510-RICR-00-00-2. RISBC-2 Rhode Island State One and Two Family Dwellings (version Amendment, 02/01/2022 to 12/01/2025)

2.1 Authority The Building Code Standards Committee, in accordance with the rulemaking authority of R.I. Gen. Laws § § 23-27.3-109.3 (a) through (c) inclusive, has formally adopted and promulgated as the Rhode Island State Building Code, the provisions of the International Residential Code (“IRC”), 2018 edition, as published by the International Code Council, Inc. (ICC), together with amendments thereto hereinafter set forth to the articles and sections of this code: 2.2 Incorporated Materials A. The provisions of R.I. Gen. Laws Chapter 23-27.3 establishing administration and enforcement are hereby incorporated by reference. § 2.3 of this Part (Chapter 1: Administration) immediately follows and is supplemental to the General Laws. Editorial Note: Code users please note: 1. When purchasing or using the IRC 2018 code, please take note of the particular printing edition. Errata to that printing edition is available online directly at no charge at www.iccsafe.org/cs/codes/pages/errata.aspx or call the office of the State Building Code Commissioner at 401-889-5550 for further information. 2. Printed copies of the administrative and enforcement provisions of R.I. Gen. Laws Chapter 23-27.3 are available at the Office of the State Building Code Commission or online at http://www.rilin.state.ri.us/Statutes/TITLE23/23-27.3/INDEX.HTM 3. The International Residential Code, 2018 edition, is protected by the copyright that has been issued to the ICC. As a result, the State Building Code is not available in complete form to the public in an electronic format. The International Residential Code 2018 edition that is referred to within is contained in a printed volume and is also in an electronic format that have been published by the ICC under an exclusive license. 2.3 Chapter 1: Administration R101.1 Delete and substitute the following: R101.1 Title. These provisions shall be known as the Rhode Island One and Two-Family Dwelling Code SBC-2-2021 and shall be cited as such and will be referred to herein as “this code.” R101.2 Delete and substitute the following: R101.2 Scope. The provisions of this code shall apply to the construction, alteration, enlargement, replacement, repair, equipment, use and occupancy and location of detached one-and two-family dwellings and multiple single-family dwellings (townhouses) not more than three stories in height with a separate means of egress, and their accessory structures. Exception: Existing one and two-family buildings undergoing a change of use shall comply with the provisions of the State Building Code SBC-1-2021( Part 1 of this Subchapter ) or State Rehabilitation Code SRC-1 ( Part 20 of this Subchapter ) as applicable. R101.3 Delete and substitute the following R101.3 Intent. The purpose of this code is to establish minimum requirements to safeguard the public safety, health and general welfare through affordability, structural strength, means of egress facilities, stability, sanitation, light and ventilation, energy conservation and safety to life and property from fire and other hazards attributed to the built environment. R102.5 Delete and substitute the following: R102.5 Appendices Appendices A, B, C, D, F, N, P, U and RP are informative only and not part of this code. Appendices E, G, H, J, K, M, O, R and S apply. Appendices I, L, and Q are deleted. New Rhode Island Appendix AA is added. R102.7 Delete and substitute the following: R102.7 Existing structures. The legal occupancy of any structure existing on the date of adoption of this code shall be permitted to continue without change, except as specifically covered in this code or as is deemed necessary by the building official for the general safety and welfare of the occupants and the public. R105.2 Delete R105.2 and substitute the following: R105.2 Work exempt from permit. Permits shall not be required for the following. Exemption from the permit requirements of this code shall not be deemed to grant authorization for any work to be done in any manner in violation of the provisions of this code or any other laws or ordinances of this jurisdiction. Building: 1. One (1) story detached accessory structures provided the floor area does not exceed two hundred (200) square feet (18.58 m 2 ). 2. Fences not over six feet (6’) (1829 mm) high. 3. Retaining walls that are not over thirty-two inches (32”) in height measured from the lower finished grade to the top of the wall, unless supporting a surcharge. Exception: 1. All cast-in-place concrete retaining walls greater than twenty-four inches (24”) in height shall require a permit. 2. All engineered masonry retaining wall systems shall be installed in accordance with manufacturer’s installation instructions 3. Water tanks supported directly upon grade if the capacity does not exceed five thousand (5,000) gallons (18,927 L) and the ratio of height to diameter or width does not exceed two to one (2 to 1). 4. Sidewalks and driveways not more than thirty inches (30”) (762 mm) above adjacent grade and not over any basement or story below. 5. Painting, papering, tiling, carpeting, cabinets, counter tops and similar finish work. 6. Prefabricated swimming pools that are less than twenty-four inches (24”) (610 mm) deep, and man-made landscape ponds of any depth. 7. Swings and other playground equipment and play structures. 8. Window awnings supported by an exterior wall. 9. Replacement window sash installations. Exception: Replacement window installations that include a frame and sash(es) require a permit. Electrical: Maintenance: A permit shall not be required for replacement of lamps, receptacles, devices, or fixtures, including the connection of portable electrical equipment to approved permanently installed receptacle. Gas: Replacement of any minor part or appliance that does not alter approval of equipment or make such equipment unsafe. Mechanical: 1. Portable heating appliance. 2. Portable ventilation appliances. 3. Portable cooling unit. 4. Steam, hot or chilled water piping within any heating or cooling equipment regulated by this code. 5. Replacement of any minor part that does not alter approval of equipment or make such equipment unsafe. 6. Portable evaporative cooler. 7. Self-contained refrigeration systems containing ten (10) pounds (4.54 kg) or less of refrigerant or that are actuated by motors of one (1) horsepower (746 W) or less. Plumbing: The stopping of leaks in drains, water, soil, waste or vent pipe; provided, however, that if any concealed trap, drainpipe, water, soil, waste or vent pipe becomes defective and it becomes necessary to remove and replace the same with new material, such work shall be considered as new work and a permit shall be obtained and inspection made as provided in this code. The clearing of stoppages or the repairing of leaks in pipes, valves or fixtures, and the removal and reinstallation of water closets, provided such repairs do not involve or require the replacement or rearrangement of valves, pipes or fixtures. R105.3.1.1 Delete and substitute the following: R105.3.1.1 Substantially improved or substantially damaged existing buildings or structures. For application for reconstruction, rehabilitation, addition, or other improvement of existing buildings or structures located in an area prone to flooding as established by Table R301.2(1) and community FIRM documents, the value of the proposed work or repair shall be provided by the owner or authorized agent and reviewed by the Building Official. If the Building Official determines that the proposed work equals or exceeds fifty percent (50%) of the market value of the building or structure, shall comply with the new code. R107 Delete section R107 in its entirety and substitute the following new section R107 Fabric Structures. Section R107 Fabric Structures R107.1 Fabric Structures: Fabric structures shall be located in accordance with applicable local zoning code provisions. Permits shall be required for any structure over two hundred (200) square feet in area and shall be installed in accordance with manufacturer’s installation instructions. Fabric structures over two hundred (200) square feet in area but less than four hundred (400) square feet in area shall have engineered wind anchors installed to withstand design wind loads and shall not remain in place for more than six (6) months in any twelve (12) consecutive month period. All structures over four hundred (400) square feet and/or intended to be in place for more than a twelve (12) month period, shall only be approved pending a satisfactory decision by the local Building Code Board of Appeals, unless full code compliance for permanent structures in all respects is demonstrated to the satisfaction of the local building official. R110.2 Delete R110.2 and substitute the following: R110.2 Change of Use. Change of use shall only be made in accordance with the provisions of the State Building Code SBC-1 ( Part 1 of this Subchapter ). Delete R110.3 #8 without substitution. Add the following section R115: R115 Other R115.1 Other Administrative issues. The Administrative provisions of R.I. Gen. Laws Chapter 23-27.3 are included herein into the balance of § 2.3 of this Part (Chapter 1 Administration). Delete the following IRC 2018 sections and refer to appropriate R.I. Gen. Laws Chapter 23-27.3: R103.1, R103.2, R103.3, R104.6, R104.7, R104.8, R105.2.2, R105.3.1, R105.3.2, R105.4, R105.5, R105.6, R105.7, R106.3.1, R106.3.2, R106.3.3, R106.5, R107.1, R107.2, R107.3, R107.4, R108.1, R108.2, R108.3, R108.4, R108.5, R108.6, R112.1, R112.2, R112.2.1, R112.2.2, R112.3, R112.4, R113.1, R113.2, R113.3, R113.4, R114.1, R114.2. Retain the following IRC 2018 Sections: R101.3, R102.1, R102.2, R102.3, R102.4, R102.6, R104.10, R102.7.1, R104.1, R104.2, R104.3, R104.4, R104.5, R104.9, R104.9.1, R104.10.1, R104.11, R104.11.1, R105.1, R105.2.1, R105.2.3, R105.3, R105.8, R106.1, R106.1.1, R106.1.2, R106.1.3, R106.2, R106.3, R106.4, R109.1, R109.1.1, R109.1.2, R109.1.3, R109.1.4, R109.1.5, R109.1.5.1, R109.1.6, R109.2, R109.3, R109.4, R110.1, R110.3, R110.4, R111.1, R111.2, R111.3. 2.4 Chapter 2 To Chapter 2 Definitions. Delete and substitute the following: “Accessory dwelling unit” shall include separate cooking & sanitary facilities, with its own legal means of egress, and is a complete, separate dwelling unit. The accessory dwelling unit shall be within, or attached to, the principal dwelling unit structure or within an existing structure, such as a garage or barn, and designed so that the appearance of the principal structure remains that of a one (1) family residence. "Accessory Structure" means in one (1) and two (2) family dwellings not more than three (3) stories high with separate means of egress, a building, the use of which is incidental to that of the main building and which is located on the same lot. "Fabric Structure" means structures utilizing wood, metal or plastic frames and covered with cloth, canvas, or plastic material, excluding tents, agricultural greenhouses, and furnishings such as umbrellas, awnings or portable shade canopies, and accessory to the residential use of the primary structure. If used for non-residential accessory use, see State Building Code SBC-1-2021 ( Part 1 of this Subchapter ). "Sleeping Unit" means a room or space in which people sleep, which can also include permanent provisions for living, eating, and either sanitation or kitchen facilities but not both. Such rooms and spaces that are also part of a dwelling unit are not sleeping units. 2.5 Chapter 3 R301.2 Delete and substitute the following: R301.2 Climatic and geographic designs criteria. Buildings shall be constructed in accordance with the provisions of this code. Additional criteria are established and set forth in Table R301.2(1) Table R301.2(1) Delete and substitute the following: Table R301.2(1) Ground Snow Load Wind Topographic Effects Seismic Design Criteria 30psf 1, 2 See figure R301.2(4) No None 4 Weathering Frost line depth 2, 3 Termite Decay Severe 40” Moderate to Heavy Slight to Moderate Winter design Temp Ice Shield Underlayment Required Flood Hazards Air Freezing Index Mean Temperature Annual 0 degrees F in Prov. County 5 degrees All Other Yes Yes (See Community FIRMS) 1,200-degree Days B.F. 50 degrees F NOTES: 1. Roof live load and roof snow load are not additive 2. New Shoreham frost depth is thirty inches (30”) and Ground Snow Load is twenty-five (25) psf. 3. Requirements for frost depth footings for accessory attached and detached structures are as follows: a. Structures and detached accessory buildings of zero (0) to one hundred ninety-nine (199) square feet do not require any frost depth foundations or footings. Two (2) ground screw anchors or other means approved by the building official shall be provided to resist overturning. b. Accessory attached structures such as decks, platforms or landings shall have footings extending to three feet and four inches (3’4”) below grade. Exterior stairs and steps off decks, balconies and platforms greater than thirty inches (30”) above grade shall have stringer supports extending to twelve inches (12”) below grade and shall be supported and secured to prevent lateral displacement or vertical collapse due to grade changes. 4. Seismic design criteria are not required for buildings and structures regulated by this code. R301.2.1 Delete and substitute the following: R301.2.1 Wind limitations. Buildings and portions thereof shall be limited by wind speed, as defined in Table R301.2(1), and construction methods in accordance with this code. Basic wind speeds shall be determined from Table R301.2(1) and Figure R301.2(4) A & B. Where different construction methods and structural materials are used for various portions of a building, the applicable requirements of this sections for each portion shall apply. Where loads for windows, skylights and exterior doors are not otherwise specified, the loads listed in Table R301.2(2) adjusted for height and exposure per Table R301.2(3), shall be used to determine design load performance requirements for windows and doors. Exception: All accessory structures less than 200 square feet in area. R301.2.1.1 Delete and substitute the following: R301.2.1.1 Design criteria. Construction in regions where the ultimate wind speeds from Figure 301.2(4)(A) equal or exceed one hundred ten (110) miles per hour (177.1 km/h) shall be designed in accordance with one (1) of the following: 1. American Forest and Paper Association (AF&PA) Wood Frame Construction Manual for One (1) and Two (2) Family Dwellings (WFCM); or 2. Southern Building Code Congress International Standard for Hurricane Resistant Residential Construction (SSTD 10); or 3. International Code Council (ICC) Standard for Residential Construction in High Wind Regions (ICC-600); or 4. Hurricane Resistant Residential Construction (SSTD 10); or Minimum Design Loads for Buildings and Other Structures (ASCE-7); 5. Cold-formed steel construction shall be designed in accordance with the provisions of this code. 6. Concrete construction shall be designed in accordance with the provisions of this code. 7. Structural insulated panel (SIP) walls shall be designed in accordance with the provisions of this code. 8. For all communities located in the one hundred ten (110) MPH and one hundred twenty (120) MPH wind zones, the prescriptive criteria in Appendix AA may be used for buildings and structures in lieu of 1-3 above: Exceptions to item 8: 1. Buildings and structures of any size in one hundred ten (110) MPH or one hundred twenty (120) MPH wind zones located in a V zone as determined by community FIRMS. 2. Two (2) or more story buildings and structures of any size located in one hundred twenty (120) MPH wind zone with more than twenty percent (20%) exterior fenestration. 3. Two (2) or more story structures with a building height greater than thirty-three feet (33’) as measured from Grade Plane to the average height of the highest roof surface. 4. Any two (2) or more-story structure or building with opening fenestration greater than forty percent (40%) on any one (1) wall. R301.2.1.2 Delete section R301.2.1.2 and substitute the following: 301.2.1.2 Protection of openings. Windows in buildings located in Wind Zone 3 shall have glazed openings protected from windborne debris or the building shall be designed as a partially enclosed building in accordance with the International Building Code. Glazed opening protection for windborne debris shall meet the requirements of the Large Missile Test of ASTM E 1996 and of ASTM E 1886 referenced therein. Exception: Wood structural panels with a minimum of thickness of seven sixteenths of one inch (7/16”) (11.1 mm) and a maximum span of eight feet (8’) (2438 mm) shall be permitted for opening protection in one (1) and two (2) story buildings. Panels shall be precut to cover the glazed openings with attachment hardware provided. Attachments shall be provided in accordance with Table R301.2.1.2 or shall be designed to resist the components and cladding loads determined in accordance with the provisions of the International Building Code. And shutter systems approved by Building Code Standards Committee. Delete without substitution sections R301.2.1.5 thru R301.2.2.4. Delete and substitute the following: R302.1 Exterior walls. Construction, projections, openings and penetrations of exterior walls of dwellings and accessory buildings shall comply with Table R302.1(1); or dwellings equipped throughout with an automatic sprinkler system installed in guidance with Appendix RP2904 shall comply with Table R302.1(2). Delete section R302.2 exceptions. Add the following section R302.2 exception and substitute the following: Exception: A common two (2) hour fire-resistance-rated wall assembly tested in accordance with ASTME 119 or UL 263 is permitted for townhouses if such walls do not contain plumbing or mechanical equipment, ducts or vents in the cavity of the common wall. The wall shall be rated for fire exposure from both sides and shall extend to and be tight against exterior walls and the underside of the roof sheathing. Electrical installations shall be installed in accordance with Rhode Island Electrical Code SBC-5-2021 ( Part 5 of this Subchapter ). Penetrations of electrical outlet boxes shall be in accordance with section R302.4. Delete section 302.5.1 and substitute the following: R302.5.1 Opening protection. Openings from a private garage directly into a room used for sleeping purposes shall not be permitted. Other openings between the garage and residence shall be equipped with solid wood doors not less than one and three eighths inches (1 3/8”) (35 mm) in thickness, solid or honeycombed-core steel doors not less than one and three eighths inches (1 3/8”) (35 mm) thick, or twenty (20) minute fire-rated doors Add the following Exception 1 to section R303.1 Habitable rooms. Exceptions: The glazed areas need not be openable where the opening is not required by section R310 and an approved mechanical ventilation system capable of producing 0.35 air change per hour in the room is installed or a whole-house mechanical ventilation system is installed capable of supplying outdoor ventilation air of fifteen (15) cubic feet per minute (cfm) (78 L/s) per occupant computed on the basis of two (2) occupants for the first (1 st ) bedroom and one (1) occupant for each additional bedroom. Delete without substitution section R303.4 Mechanical ventilation. Delete without substitution section R303.5.2. 303.7 Delete section R303.7 and substitute the following: 303.7 Stairway illumination. All interior and exterior stairways shall be provided with a means to illuminate the stairs, including the landings and treads. Interior stairways shall be provided with an artificial light source located in the immediate vicinity of each landing of the stairway. Exterior stairways shall be provided with an artificial light source located in the immediate vicinity of the top landing of the stairway. Exterior stairways providing access to a basement from the outside grade level shall be provided with an artificial light source located in the immediate vicinity of the bottom landing of the stairway. Exception: An artificial light source is not required at the top and bottom landing, provided an artificial light source is located directly over each stairway section. Remove without substitution section R309.5. R310.1 Delete R310.1 and substitute the following: R310.1 Emergency escape and rescue required. Basements with habitable space and every sleeping room shall have at least one (1) openable emergency escape and rescue window or exterior door opening for emergency escape and rescue. Where basements contain one or more sleeping rooms, emergency egress and rescue openings shall be required in each sleeping room but shall not be required in adjoining areas of the basement. Where openings are provided as a means of escape and rescue they shall have a sill height of not more than forty-four inches (44”) (1118 mm) above the floor. Where a door opening having a threshold below the adjacent ground elevation serves as an emergency escape and rescue opening and is provided with a bulkhead enclosure, the bulkhead enclosure shall comply with Section R310.3. The net clear opening dimensions required by this section shall be obtained by the normal operation of the window or door opening from the inside. Escape and rescue window openings with a finished sill height below the adjacent ground elevation shall be provided with a window well in accordance with Section R310.2. Exception: Basements with habitable space not used for bedrooms shall not require an emergency escape under any one of the following two conditions: 1. Residential sprinkler systems conforming to NFPA 13D or RP 2904 latest edition shall be installed throughout all areas of the basement or cellar, or 2. Fuel-fired equipment shall be separated from the habitable room and means of egress with one (1) hour rated construction and twenty (20) minute rated opening protectives. R310.7 Add the following new section R310.7: R310.7 Basement or Cellar Windows: Except as may be otherwise provided for habitable or occupiable rooms, at least two (2) operable windows twelve inches (12”) by thirty-two inches (32”) nominal size shall be installed reasonably remote from each other. Security devices shall not unreasonably impede the use of these windows for light, ventilation or firefighting purposes. Delete section R311.3.1 exception: and substitute the following: R311.3.1 Floor elevations at the required egress doors. Landings of finished floors at the required egress door shall be not more than one and one half inches (1 ½”) (38 mm) lower than the top of the threshold. Exception The landing or floor of the exterior side shall be not more than eight and one quarter inches (8 ¼”) (209.55 mm) below the top of the threshold provided that the door does not swing over the landing or floor. Where exterior landings of floors serving the required egress door are not at grade, they shall be provided with access to grade by means of a ramp in accordance with Section R311.8 or a stairway in accordance with Section R#11.7 Delete IRC R311.3.2 and substitute the following: R311.3.2 Floor elevations at other exterior doors Doors other that the required egress door shall be provided with landings or floors no more than eight and one quarter inches (8 ¼”) (209.55 mm) below the top of the threshold. Exception A top landing is not required where a stairway of not more than two (2) risers is located on the exterior side of the door, provided that the door does not swing over the stairway. Delete IRC section R311.6 and substitute the following: R311.6 Hallways. The minimum width of a hallway shall be not less than three feet (3’). Baseboard, casings and other trim shall not reduce the required width to less than thirty-four and one half inches (34 1/2”). Delete IRC sections R311.7.5.1 and R311.7.5.2 and substitute the following: R311.7.5.1 Riser height. The maximum riser height shall be eight and one quarter inches (8 1/4”) (210 mm). The riser shall be measured vertically between leading edges of the adjacent treads. The greatest riser height within any flight of stairs shall not exceed the smallest by more than three eighths of one inch (3/8”) (9.5 mm). R311.7.5.2 Tread depth. The minimum tread depth shall be nine inches (9”) (229 mm). The tread depth shall be measured horizontally between the vertical planes of the foremost projection of adjacent treads and at a right angle to the tread’s leading edge. The greatest tread depth within any flight of stairs shall not exceed the smallest by more than three eighths of one inch (3/8”) (9.5 mm). Winder treads shall have a minimum tread depth of nine inches (9”) (229 mm) measured as above at a point twelve inches (12”) (305 mm) from the side where the treads are narrower. Winder treads shall have a minimum tread depth of six inches (6”) (152 mm) at any point. Within any flight of stairs, the greatest winder tread depth at the twelve inches (12”) (305 mm) walk line shall not exceed the smallest by more than three eighths of one inch (3/8”) (9.5 mm). Delete IRC section R311.7.5.3 and replace with the following: 311.7.5.3. Profile. The radius of curvature at the leading edge of the tread shall be no greater than nine sixteenths of one inch (9/16”) (14.3 mm). A nosing not less than three quarters of one inch (¾”) (19.1 mm) but not more than one and one quarter inches (1 1/4”) (32 mm) shall be provided on stairways with solid risers. The greatest nosing projection shall not exceed the smallest nosing projection by more than three eighths of one inch (3/8”) (9.5 mm) between two (2) stories, including the nosing at the level of floors and landings. Beveling of nosing shall not exceed one half of one inch (½”) (12.7 mm). Risers shall be vertical or sloped from the underside of the leading edge of the tread above at an angle not more than thirty (30) degrees from the vertical. Open risers are permitted. Exception: A nosing is not required where the tread depth is a minimum of eleven inches (11”) (279 mm). R311 Add the following new section: R311.7.10.3 Attic and other Pull-Down Types of Stairs Pull-down types of stairs shall not be required to meet the provisions of sections R311.7.5.1, R311.7.5.2 and R312. Delete IRC R311.8.1 and replace with the following: R311.8.1 Maximum Slope Ramps shall have a maximum slope of one (1) unit vertical in eight (8) units horizontal (twelve and one half percent (12.5%) slope). R312 Add new section as follows: R312.3 Seat or Bench Elements. Guardrails which incorporate seat or bench elements shall have a guardrail system complying with section R312.3 to a height of thirty-six inches (36”) measured from the seat surface. The guardrail system shall also extend to the floor surface below the bench or seat element. Exception: 1. Porches, balconies or raised floors thirty inches (30”) or less above the floor or grade below. 2. Freestanding moveable seat and bench elements R313.1 Delete sections R313.1 and 313.2 and substitute the following R313.1 General. Automatic fire sprinkler if installed at the applicant’s option will be in conformance with Appendix RP R314 Delete section R314 Smoke Alarms and substitute the following: R314 Provisions for Fire Detection Systems Provisions for Fire Detection Systems are contained within the Rhode Island Uniform Fire Safety Code. R315 Delete entirely R315 Provisions for Fire Detection Systems Provisions for Fire Detection Systems are contained within the Rhode Island Uniform Fire Safety Code. Delete section R317.1.3 and substitute the following: R317.1.3 Geographical Areas. Approved naturally durable or pressure-treated wood shall be used for those portions of wood members which form the structural supports of buildings, balconies, porches, or similar permanent building appurtenances when such members are exposed to the weather without adequate protection from a roof, eave, overhang or other covering which would prevent moisture or water accumulation on the surface or at joints between members. Depending on local experience, such members may include: 1. Horizontal members such as girders, joists and decking. 2. Vertical members such as posts, poles and columns. 3. Both horizontal and vertical members. R322.1 Add the following new section: R322.1 General. Building and structures in flood hazard areas, not designated as coastal A zones or coastal high hazard areas, shall have the lowest floors elevated to or above the base flood elevation, plus one foot (1’) (305 mm), or the design flood elevation, whichever is higher. R322.3.11 Add the following new section: The following certifications shall be submitted to the building official: 1. For construction in flood hazard areas not subject to high-velocity wave action: 1.1 As part of the lowest floor elevation requirements of section R324.2.1, certification of the elevation of the lowest floor, including basement. 1.2 For fully enclosed areas below the design flood elevation where provisions to allow for the automatic entry and exit of floodwaters do not meet the minimum requirements in section 2.6.1.1, ASCE 24-14, certification by a registered design professional that the design will provide for equalization of hydrostatic flood forces in accordance with section 2.6.1.2, ASCE 24-14. 2. For construction in flood hazard areas subject to high-velocity wave action: 2.1 As part of the lowest floor elevation requirements section R323.3.2, a certification of the elevation of the lowest horizontal structural member. 2.2 A certificate prepared by a registered design professional that the building is designed in accordance with ASCE 24-14, including that the pile or column foundation and building or structure to be attached thereto is designed to be anchored to resist flotation, collapse and lateral movement due to the effects of wind and flood loads acting simultaneously on all building components, and other load requirements of section R324.3.3. 2.3 For breakaway walls designed to resist a nominal load of less than ten (10) pounds per square foot (0.48 kN/m2) or more than twenty (20) pounds per square foot (0.96 kN/m2), a certificate prepared by a registered design professional that the breakaway wall is designed in accordance with ASCE 24-14. R322.4 Add new Section: Variances and Appeals The Board of Appeals after examining the applicant’s hardships shall approve or disapprove a variance request and shall hear and decide appeals from the requirements of these regulations, in accordance with the procedures of R.I. Gen. Laws § 23-27.3-127.0 of the Rhode Island State Building Code and the following: Board of Appeals The local (or State) Board of Appeals shall hear and decide appeals when it is alleged there is an error in any requirement, decision or determination made by the Building Official in the enforcement or administration of these Regulations. Conditions of Acceptance: (1) Variances may be issued for the reconstruction, rehabilitation or restoration of structures listed on the National Register of the State Inventory of Historic Places, without regard to the procedures set forth in this Section. (2) Variances may be issued for new construction and substantial improvements to be erected on a lot of one half (1/2) acre or less in size contiguous to and surrounded by lots with existing structures constructed below the base flood level in conformance with the procedures of paragraphs (B)(3), (4), (5), and (6) of this Section. (3) Variances shall only be issued upon a determination that the variance is the minimum necessary, considering the flood hazard, to afford relief. (4) Variances shall only be issued upon: 1. A showing of good and sufficient cause, 2. A determination that failure to grant the variance would result in exceptional hardship to the applicant, and 3. A determination that the granting of a variance will not result in increased flood heights, additional threats to public safety, extraordinary public expense, create nuisances, cause fraud on or victimization of the public or conflict with existing local laws or ordinances. (5) Any applicant to whom a variance is granted shall be given notice in the written decision from the Board of Appeals that the structure will be permitted to be built with a lowest floor elevation X foot below the base flood elevation. (6) The Board of Appeals shall notify the applicant in the written decision that: The issuance of a variance to construct a structure below the base flood level will result in increased premium rates for flood insurances up to amounts as high as twenty-five dollars ($25.00) for one hundred dollars ($100.00) of insurance coverage and Such construction below the base flood level increases risks to life and property. Such notification shall be maintained with a record of all variances actions, including justification for their issuance. All such variances issued shall be reported in the community's Annual Report to the Federal Insurance Administration. (7) Variances shall not be issued by a community within any designated regulatory floodway, if any increase in flood levels during the base discharge would result. (For communities which must meet the requirements of Section 60.3 (d) of the National Flood Insurance Program regulations). (8) Upon receipt of an application for a variance the Chairman of the Board of Appeals shall forward a copy of the application to the Rhode Island Emergency Management Office, Statewide Flood-Plain Coordinator. 2.6 Chapter 4 Table R401.4.1 Delete IRC Table R401.4.1 and substitute the following: Table R401.4.1 Presumptive Load-Bearing Values of Foundation Materials Type of Soil Load Bearing Pressure psf Crystalline Bedrock 12,000-20,000 psf Sedimentary and Foliated Rock 8,000-12,000 psf Medium Dense-to-Dense Sandy Gravel and Gravel 4,000 psf Medium Dense-to-Dense well-graded Sand, Silty Sand and Silty Gravel 3,000 psf Firm Fine Sand, Silty Sand and Silty Gravel 1,500 psf Loose Fine Sand, Silty Sand, organic soils, clay and areas suspected at being filled 1,000 psf Table R402.2 Delete IRC Table R402.2 and substitute the following: TABLE NO R-402.2 MINIMUM SPECIFIED COMPRESSIVE STRENGTH OF CONCRETE LOCATION MINIMUM f’ c OF CONCRETE AT 28 DAYS Basement and foundation walls, continuous and isolated footings, basement and garage slabs 2500 psi *Exterior slabs, walks and steps exposed to weather 3000 psi *Exterior slabs shall be air-entrained concrete Delete section R403.1.4.1 Frost Protection and substitute the following: R403.1.4.1 Frost Protection. Except where otherwise protected from frost, foundation walls, piers and other permanent supports of buildings and structures shall be protected from frost by one (1) or more of the following methods: Extending below the frost line specified in Table R301.2. (1) Constructing in accordance with section R403.3 Constructing in accordance with ASCE32-01; Erected on solid rock. Exceptions: Freestanding accessory structures with an area of two hundred (200) square feet (18.5 m 2 ) or less and an eave height of ten feet (10’) (3048 mm) or less shall not be required to be protected. Decks not supported by a dwelling need not be provided with footings that extend below the frost line. Footings shall not bear on frozen soil unless such frozen condition is of a permanent character. R403.1.6 Delete sections R403.1.6 and R403.1.6.1 and substitute the following: R403.1.6 General Foundation Anchorage. Foundation sill plates at exterior walls shall be anchored to the foundation as follows: 1 + 2 story buildings ½” @ 48” o/c or 5/8” @ 72” o/c 3 story building ½” @ 24” o/c or 5/8” @ 36” o/c Bolts shall be spaced not more than twelve inches (12”) from the corners. Bolts shall extend a minimum of fifteen inches (15”) into masonry or seven inches (7”) into concrete. Sill plates shall be protected from decay in accordance with section R323. Nuts and washers shall be tightened on each bolt to the plate and shall not be recessed or countersink into the first plate. Bolts shall be high enough to allow for full engagement of the nut and nuts shall be left exposed for inspection at the framing stage of construction. Exception: Foundation anchor straps, spaced as required to provide equivalent anchorage to one half inch (½”) diameter anchor bolts. R403.1.6.1 Braced Panel Anchorage. Shear walls shall be anchored to the foundation in accordance with Appendix AA or the reference standards in R301.2.1.1. The shear wall connections shall be in addition to general foundation anchorage requirements. TABLE R404.1.2(1) MINIMUM HORIZONTAL REINFORCEMENT FOR CONCRETE BASEMENT WALLS A, B MAXIMUM UNSUPPORTED HEIGHT OF BASEMENT WALLS (feet) LOCATION OF HORIZONTAL REINFORCEMENT > 8 One No.4 bar within 12 inches of the top of the wall story and one No.4 bar near third points in the wall story 2.7 Chapter 5 Delete section IRC R501.3 without substitution. 2.8 Chapter 6 R602.10 Delete IRC section R602.10 and substitute the following: R602.10 Wall bracing. Walls shall be braced in accordance with this section. Exception: Structures subject to the scope limitations of Appendix AA shall be permitted to be braced in accordance with Appendix AA in lieu of the provisions of this section. 2.9 Chapter 7 R703.18 Add the following: R703.18 Re-siding Exterior Walls. Materials and methods of application used for residing or replacing an existing wall covering shall comply with the requirements of section R703. New exterior side wall covering shall not be installed without first removing existing wall coverings when any of the following conditions occur: 1. When the existing wall or wall covering is water-soaked or has deteriorated to the point that the existing wall or wall covering is not acceptable as a base for additional covering. 2. When the existing wall has three (3) or more applications of any wall covering. Exception: The total number of wall coverings shall not be limited when any of the existing wall coverings consist of asbestos cement board or asbestos cement shingles or any protective encapsulating or protective siding/layer immediately over the asbestos material. Asbestos cement board or asbestos cement shingles and any protective encapsulating layer thereupon shall not be required to be removed unless the existing wall is unacceptable for use as a base for additional layers of wall covering. Any disturbance, repair or removal of existing asbestos cement board or asbestos cement shingles shall be in accordance with all State and Federal Regulations. 2.10 Chapter 8 R802.6 Bearing. The ends of each rafter or ceiling joist shall have not less than one and one half inches (1 ½”) (38 mm) of bearing on wood or metal and not less than three inches (3”) (76 mm) on masonry or concrete. R802.11.1.3 Delete and substitute the following: R802.11.1.3 Rafters: Rafters shall have ties at the wall plate and ridge bearing points in accordance with Appendix AA R807.1 Add the words “or closet” after the word “hallway” on line 3 paragraph 2. 2.11 Chapter 9 R905.2.6 Delete section R905.2.6 and substitute the following: R905.2.6 Attachment. Asphalt strip shingles shall have a minimum of six (6) fasteners per shingle. Exceptions: 1. Where the roof slope exceeds twenty (20) units vertical in twelve (12) units horizontal (20:12), special fastening details may be required by the manufacturer. 2. Fastening systems tested by the manufacturer to ASTM D3161 modified to use a wind speed of one hundred ten (110) MPH shall be permitted to be installed in any wind zone. R905.2.8.2 #3 Delete and substitute the following: R905.2.8.2 #3 3. For closed valleys (valley covered with shingles), valley lining of one ply of smooth roll roofing complying with ASTM D224 Type II or Type III and at least thirty-six inches (36”) (914 mm) wide or valley lining as described in Items 1 and 2 above shall be permitted. Specialty underlayment complying with ASTM D 1970 may be used in lieu of the lining material. Other valley lining systems and techniques acceptable to the shingle manufacturer shall be approved by the Building Official. 2.12 Chapter 10 Add the following new section R1007 Room Heater R1007.0 Room Heaters (Wood/Coal/Pellet Stoves) R1007.1 General: Solid-fuel-burning room heaters shall be tested in accordance with UL 1482 listed in Appendix A of this Code. Multiple fuel-flue installations A solid-fuel-burning room heater shall not connect to a chimney passageway venting another appliance. R1007.3 Used or antique stoves and room heaters: The Building Official shall permit the installation and use of non-listed or tested stoves and heaters when installed in accordance with the provisions of Table R1007.3 as follows: Table R1007.3 CLEARANCE REDUCTION METHODS TYPE OF PROTECTIVE ASSEMBLY a REDUCED CLEARANCE WITH PROTECTION (inches) a Horizontal combustible assemblies located above the heat source Horizontal combustible assemblies located beneath the heat source and all vertical combustible assemblies Required clearance to combustibles without protection (inches) a Required clearance to combustibles without protection (inches) a 36 18 9 6 36 18 9 6 Galvanized sheet metal, minimum nominal thickness of 0.024 inch (No. 24 Gage), mounted on 1 inch glass fiber or mineral wool batt reinforced with wire on the back, 1 inch off the combustible assembly 18 9 5 3 12 6 3 3 Galvanized sheet metal, minimum nominal thickness of 0.024 inch (No. 24 Gage), spaced 1 inch off the combustible assembly. 18 9 5 3 12 6 3 2 Two layers of galvanized sheet metal, minimum nominal thickness of 0.024 inch (No. 24 Gage), having a 1 inch airspace between layers, spaced 1 inch off the combustible assembly 18 9 5 3 12 6 3 3 Two layers of galvanized sheet metal, minimum nominal thickness of 0.024 inch (No. 24 Gage), having 1 inch of fiberglass insulation between layers, spaced 1 inch off the combustible assembly. 18 9 5 3 12 6 3 3 0.5-inch inorganic insulating board, over 1 inch of fiberglass or mineral wool batt, against the combustible assembly. 24 12 6 4 18 9 5 3 3.5-inch brick wall, spaced 1 inch off the combustible wall 12 6 6 6 3.5-inch brick wall, against the combustible wall 24 2 6 5 For SI: 1 inch = 25.4 mm, oC = [(oF)-32]/1.8, 1 pound per cubic foot = 16.02 kg/m 3 , 1.0 Btu x in/ft 2 . h. oF=0.144 W/m 2 . oK. a Mineral wool and glass fiber batts (blanket or board) shall have a minimum density of 8 pounds per cubic foot and a minimum melting point of 1,500o F. Insulation material utilized as part of a clearance reduction system shall have a thermal conductivity of 1.0 Btu x in/ft 2 .h. oF) or less. Insulation board shall be formed of noncombustible material. 2.13 Chapter 11 N1101.1 Delete section N1101.2 and substitute the following: N1101.1.1 Compliance Methods Compliance shall be demonstrated by either: 1. Meeting the requirements of the Rhode Island Energy Conservation Code SBC-8-2021 ( Part 8 of this Subchapter ). 2. Meeting the requirements of this Chapter using the criteria for climate zone 5 from Figure N 1102A or Table 1102.1.2. 3. Compliance submission of Res-Check for Zone 5 & Chapter 11 Delete Table N1101.8 without substitution N 1101. 7 (R301.1) Climate Zones : Rhode Island shall be considered as climate zone 5 with the following design conditions. Table N1101.7 (R301.1) Delete and substitute the following: Table N1101.7 (R301.1) Exterior Design Conditions. Value Value Climate zone Providence County All others Winter, design dry-bulb (degree F) 0 5 Summer, design dry-bulb 87 89 Summer design wet-bulb 71 73 Degree days heating 6831 5950 Degree days cooling 371 811 Delete without substitute sections N1101.7, N1101.7.2, N1101.7.3 R301.2 and R301.3, R301.4. Delete Table N1101.7.2 (1) (R301.3(1)) without substitute. Delete Table N1101.7.2 (2) (R301.3(2)) without substitute. Delete Figure N1101.7 (R301.1) and substitute the following: Figure N1101.7 (R301.1) Figure N1101.7 (R 301.1) Delete Table N1101.14 (R401.3) and substitute the following: Add the following to N1101.14 (R401.3), Certificate: Figure N1101.14 (R401.3) A certificate similar to this shall be attached to or near the electrical panel board ENERGY CERTIFICATE Street Address City/Town Predominant Values R-Value Ceiling/Roof R- Value Walls R- Value Ducts (outside conditioned space) U Factor Fenestration SHGC Fenestration Gas Fired Un-Vented Room Heater Baseboard Electric Heater Electric Furnace U Factor Skylight/SHGC AFUE Value Boiler/Furnace Efficiency and type of heating equipment Efficiency and type of cooling equipment Efficiency and type of service water heater Contractor or Design Professional Address Registration Signature Delete and substitute table N1102.1.2 (R402.1.2) TABLE N1102.1.2 (R402.1.2) INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENT a CLIMATE ZONE FENESTRATION U-FACTOR b SKYLIGHT b U-FACTOR GLAZED FENESTRATION SHGC b CEILING R-VALUE i WOOD FRAME WALL R-VALUE g MASS WALL R-VALUE FLOOR R-VALUE BASEMENT C WALL R-VALUE SLAB d R-VALUE & DEPTTH CRAWL SPACE c WALL 5 0.35 0.60 NR 38 20 or 13+5 f 13/17 30 e 10/13 R-10 for 2 ft 10/13 For SI: 1 foot = 304.8 mm. R-values are minimums U-factors and SHGC are maximums. R-19 batts compressed into a nominal two (2) by six (6) framing cavity such that the R-value is reduced by R-1 or more shall be marked with the compressed batt R-value in addition to the full thickness R-value. The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed fenestration. “10/13” means R-10 continuous insulated sheathing on the interior or exterior of the home or R-13 cavity insulation at the interior of the basement wall. R-5 shall be added to the entire slab and the required slab edge R-values for heated slabs or insulation sufficient to fill the framing cavity, R-19 minimum. “13+5” means R-13 cavity insulation plus R-5 insulated sheathing. If structural sheathing covers twenty-five percent (25%) or less of the exterior, insulating sheathing is not required where structural sheathing is used. If structural sheathing covers more than twenty-five percent (25%) of exterior, structural sheathing shall be supplemented with insulated sheathing of at least R-2. The second R-value applies when more than half the insulation is on the interior of the mass wall. TABLE N1102.1.4(R402.1.4) EQUIVALENT U-FACTORS a CLIMATE ZONE FENESTRATION U-FACTOR SKYLIGHT U-FACTOR CEILING U-FACTOR FRAME WALL U-FACTOR MASS WALL U-FACTOR b FLOOR U-FACTOR BASEMENT WALL U-FACTOR CRAWL SPACE U-FACTOR 5 0.32 0.55 0.026 0.057 0.082 0.033 0.050 0.055 Delete N1102.1.5 (R402.1.5) Total UA alternative and substitute the following: N1102.1.5 (R402.1.5) Total UA alternative. If the total building thermal envelope UA (sum of U-factor times assembly area) is less than or equal to the total UA resulting from using the U-factors in Table R402.1.3 (multiplied by the same assembly area as in the proposed building), the building shall be considered in compliance with Table R402.1.1. The UA calculation shall include the thermal bridge effects of framing materials. The UA calculation shall include the thermal bridging effects of framing materials. The SHGC requirements shall be met in addition to UA compliance. Delete section N1102.4.1.2 (R402.4.1.2) and substitute the following: N1102.4.1.2 Testing. The building or dwelling unit shall be tested, and Testing shall be conducted with a blower door at a pressure of two tenths of one inch (0.2”) w.g. (fifty (50) Pascals). Maximum air change rates per hour: In 2019 = 8, 2020 = 7, 2021 = 6, and 2022 and subsequent years = 5. Testing shall be conducted by an approved third party, where required by the building official. A written report of the results of the test shall be signed by the party conducting the test and provided to the building official. Testing shall be performed at any time after creation of all penetrations of the building thermal envelope. During testing: Exterior windows and doors, fireplace and stove doors shall be closed, but not sealed, beyond the intended weather-stripping or other infiltration control measures; Dampers including exhaust, intake, makeup air, backdraft and flue dampers shall be closed, but not sealed beyond intended infiltration control measures; Interior doors, if installed at the time of the test, shall be open. Exterior doors for continuous ventilation systems and heat recovery ventilators shall be closed and sealed; Heating and cooling systems, if installed at the time of the test, shall be turned off; and Supply and return registers, if installed at the time of the test, shall be fully open. N1103.3.3 (R403.3.3) Duct Testing (Mandatory) Delete section N1103.3.3 (R403.3.3) and substitute the following: N1103.2.2 (R403.2.2) Sealing (Mandatory). Ducts, air handlers, and filter boxes shall be sealed. Joints and seams shall comply with section M1601.4.1 of this code. Exceptions: Air-impermeable spray foam products shall be permitted to be applied without additional joint seals. Where a duct connection is made that is partially inaccessible, three (3) screws or rivets shall be equally spaced on the exposed portion of the joint so as to prevent a hinge effect. Continuously welded and locking –type longitudinal joints and seams in ducts operating at a static pressures less than two inches (2”) of water column (five hundred (500) Pascals) pressure classification shall not require additional closure systems. Duct tightness shall be verified by either of the following: Postconstruction test: Total leakage shall be less than or equal to eight (8) cfm (113.3 L/min) per one hundred (100) square feet (9.29 m 2 ) of conditioned floor area. Rough-in test: Total leakage shall be less than or equal to six (6) cfm (113.3 L/min) per one hundred (100 ft 2 ) (9.29 m 2 ) of conditioned floor area when tested at a pressure differential of one tenth of one inch (0.1”) w.g. (25 Pa) across the system, including the manufacturer’s air handler enclosure. All registers shall be taped or otherwise sealed during the test. If the air handler is not installed at the time of the test. Total leakage shall be less than or equal to four (4) cfm (85 L/min) per one hundred (100) square feet (9.29 m 2 ) of conditioned floor area. Exception: The total leakage test is not required for ducts and air handlers located entirely within the building envelope. Delete section N1103.3.5 (R403.3.5) and substitute the following: N1103.3.5 (R403.3.5) Building cavities (Mandatory). Interior building framing cavities shall be permitted to be used as return ducts or plenums. (BP) Delete Table N1103.6.1 without substitutions Reference Standards Delete without substitute ASHRAE – 2013 ASHRAE Handbook of Fundamentals. 2.14 Chapter 14 M 1401.3 Delete section M1401.3 and substitute the following: M 1401.3 Sizing. Heating and cooling equipment shall be sized based on building loads calculated in accordance with ACCA Manual J or other approved heating and cooling methodologies. To recognize equipment sizing availability and to provide for future additions, equipment shall be sized so as not to exceed one hundred fifty percent (150%) of the submitted building load calculations. 2.15 Chapter 15 M 1502.4.5 Delete and substitute the following: M 1502.4.5 Length identification. The maximum length of dryer duct may exceed thirty-five feet (35’) when a permanent placard, measuring a minimum five inches (5”) wide, three inches (3”) high, and one eighth of one inch (1/8”) thick, and constructed of either wood, metal, or rigid plastic, and bearing raised or embossed lettering stating the following: “WARNING: THE EFFECTIVE LENGTH OF THIS DRYER DUCT IS xxx FEET. ANY DRYER CONNECTED TO THIS EXHAUST DUCT MUST BE RATED TO USE AN EXHAUST DUCT OF THIS LENGTH, PER THE MANUFACTURERS SPECIFICATIONS; SEVERE RISK OF FIRE MAY RESULT FOR NONCOMPLIANCE WITH THIS NOTICE.” The provisions of section M102.4 shall be used in establishing the effective length of the ductwork installed and noted on the placard. The placard shall be permanently attached to the wall or floor within six inches (6”) of the terminus of the duct. M1506.2 Delete without substitution. 2.16 Chapter 16 M1601.4.1 Add the following exceptions to section M1601.4.1 Exceptions: 4. Flexible air ducts shall be permitted to be joined with or without tapes using approved mechanically fastened tension straps or flex-ties installed with a tensioning gun or other similar technologies. M1602.2 Add the following to exception #4 M1602.2.4 Exception #4 continued Return air shall be permitted to be taken from locations such as a kitchen which is provided its own separate and individual system providing one hundred percent (100%) of the supply air for that space. 2.17 Chapter 18 To section M1801.3.1 Size add the following exception: Exception: Installation of replacement appliances below an eighty-five percent (85%) AFUE rating shall be exempt from the requirement of installing a new chimney liner and must meet the manufacturer’s recommendations for installation in an unlined chimney. 2.18 Chapter 19 Delete section M1901.3 without substitution. 2.19 Chapter 22 Add the following exception to section M2201.1 Materials. Exception: Non-metallic storage tanks shall meet the requirements of UL subject 2258 and shall be installed in accordance with manufacturer’s instructions. Delete section M2201.2 and substitute the following. M2201.2 Above ground tanks. The maximum amount of fuel oil stored any above ground or inside of a building shall be one thousand three hundred twenty (1,320) gallons (2,498 L) and the maximum amount of oil connected to any one (1) appliance shall be six hundred sixty (660) gallons. When capacity exceeds six hundred sixty (660) gallons the tanks shall be double walled and sized so that they can be removed from the building without dismantling of the tank. M2203.8 Add the following code section: M2203.8 Emergency Disconnect Switch. When an oil-fired heating, appliance is located inside a structure, a remote means of shutting off power to the oil pump and firing circuit in addition to the serviceman’s switch shall be provided as follows: 1. When the appliance is located in an unfinished basement or cellar, an additional shutdown switch shall be installed at the entrance to the basement at the top of the stairs. 2. When the appliance is located in a separately dedicated utility room, the switch shall be located outside the room immediately adjacent to its entrance. 3. When the appliance is located in a crawl space or attic, the switch shall be located immediately outside the entrance to the crawl space or attic area. The switch shall be located on a wall mounted between sixty inches (60”) and eighty inches (80”) above the floor surface and be identified with a red cover plate suitably identified as to its purpose. 2.20 Chapter 24 G2406.2 (303.3) Add the following new exception: (6) Gas fired appliances may be installed in loft or open efficiency type apartments when there is a sleeping area not a sleeping room. The installation of appliances must comply with section 304.5 for combustion air required volume and the manufacturers’ installation instructions. G2411.1.1 Delete and substitute the following: G2411.1.1 310.1.1 CSST CSST gas piping systems shall be bonded to the electrical service grounding electrode system. The bonding jumper shall connect to a metallic pipe or fitting between the point of delivery and the first downstream CSST fitting. The bonding jumper shall be copper and not smaller than 6AWG. The bonding jumper shall not exceed forty feet (40’) in length. CSST system with a conductive jacket deemed to be equivalent to a direct bonded CSST system by an approved listing agency shall only be required to be bonded in accordance with section Residential Code 2411.1 or Fuel Gas Code 310.1. The installation of the bonding jumper shall be by an electrician with an electrical permit and inspected by the electrical inspector. G2415.3 Delete G2415.3 and substitute the following: G2415.3 (401.1) Prohibited locations. Piping shall not be installed in or through a ducted supply, return or exhaust, or a clothes chute, chimney or gas vent, dumbwaiter or elevator shaft. Piping installed downstream of the point of entry may extend through any townhouse unit other than the unit served by such piping. G2415.6 Delete and substitute the following: G2415.6 (404.4) Piping through foundation wall. Underground piping, where installed below grade through the outer foundation or basement wall of a building, shall be encased in a protective pipe sleeve. The annular space between the gas piping and the sleeve shall be sealed. G2425.15 Add the following exception to G2425.15.1: Exception: Installation of replacement appliances below an eighty-five percent (85%) AFUE rating shall be exempt from the requirement of installing a new chimney liner and must meet the manufacturer’s recommendations for installation in an unlined chimney. 2.21 Chapter 25 P-2501.1 Delete 2501.1 and substitute the following: P2501.1 Scope. The provisions of this chapter shall govern the installation of plumbing not specifically covered in other chapters applicable to plumbing systems P2503.4 Delete section P2503.4 Building Sewer Testing without substitution. Delete section 2503.5.1 and substitute the following P2503.5.1 Rough plumbing. DWV systems shall be tested on completion of the rough piping installation by water or air with no evidence of leakage. Either test shall be applied to the drainage system in its entirety or in sections after rough piping has been installed, as follows: Water test. Each section shall be filled with water to a point not less than ten feet (10’) (3048 mm) above the highest fitting connection in that section, or to the highest point in the completed system. Water shall be held in the section under test for a period of fifteen (15) minutes. The system shall prove leak free by visual inspection. Air test. The portion under test shall be maintained at a gauge pressure of five (5) pounds per square inch (psi) (34 kPa) or ten inches (10”) of mercury column (34kPa). This pressure shall be held without introduction of additional air for a period of fifteen (15) minutes. P2503.5.2 Delete section P2503.5.2 Finished Plumbing and substitute the following: P2503.5.2 Finished Plumbing. After the plumbing fixtures have been set and the in traps filled with water, their connections shall be tested and proved watertight by filling and then draining each fixture and their traps and fixture connections proven tight by visual inspection. 2.22 Chapter 26 P2603.4 Add the following exception to section P2603.4 Pipes through footings or foundation walls: Exception: PVC schedule forty (40) minimum pipe shall not be required to be sleeved or be provided with a relieving arch. P2603.5 Add the following exception to section P2603.5 Freezing: Exception: Soil and vent stacks located within exterior walls and vent pipes in attics shall not be required to be insulated. P2603.5.1 Delete section P2603.5.1 and substitute the following P2603.5.1 Sewer Depth. Building sewers that connect to private sewage disposal systems shall meet the requirements of the Department of Environmental Management’s Regulations for onsite wastewater treatment systems, 250-RICR-150-05-4 and 250-RICR-150-10 Parts1 through 8. Building sewers connecting to a public sewer shall be a minimum of thirty-six inches (36”) below grade. 2.23 Chapter 29 P2902.7 Protection of individual water supplies. An individual water supply shall be located and constructed so as be safeguarded against contamination in accordance with sections P2902.7.1 through P2902.7.8. P2902.7.1 Well locations. A potable ground water source or pump suction line shall not be located closer to potential sources of contamination than the distances shown in Table P2902.7.1. In the event the underlying rock structure is limestone or fragmented shale, the local or State Health Department shall be consulted on well site location. The distances in Table P2902.1 constitute minimum separation and shall be increased in areas of creviced rock or limestone, or where the direction of movement of ground water is from sources of contamination toward the well. TABLE P2902.7.1 DISTANCE FROM SOURCES OF CONTAMINATION TO PRIVATE WATER SUPPLIES AND PUMP SUCTION LINES Source of Contamination Distance (feet) (1 foot=304.8mm) Sewer 50 Septic Tank 50 Pasture 100 Sewer (leaded or mechanical joints or approved plastic) 10 Subsurface pits 100c Seepage pits 100 Cesspools 100 Barnyard 100 Farm silo 25 Pump house floor drain of cast iron draining to ground surface 2 P2902.7.2 Elevation. Well sites shall be positively drained and shall be at higher elevations than potential sources of contamination. P2902.7.3 Depth. Private potable well supplies shall not be developed from a water table less than ten feet (10’) (3048 mm) below the ground surface P2902.7.4 Water-tight casings. Each well shall be provided with a water-tight casing extending to not less than ten feet (10’) (3048 mm) below the ground surface. Casings shall extend not less than six inches (6”) (152 mm) above the well platform. Casings shall be large enough to permit installation of a separate drop pipe. Casings shall be sealed at the bottom in an impermeable stratum or extend several feet into the water-bearing stratum. P2902.7.5 Drilled or driven well casings. Drilled or driven well casings shall be of steel or other approved material. Where drilled wells extend into a rock formation, the well casing shall extend to and set firmly in the formation. The annular space between the earth and the outside of the casing shall be filled with cement grout to a depth of not less than ten feet (10’) (3048 mm) below the ground surface. In an instance of casing to rock installation, the grout shall extend to the rock surface. P2902.7.6 Dug or bored well casings. Dug or bored well casings shall be of water-tight concrete, tile, galvanized or corrugated metal pipe extending to not less than ten feet (10’) (3048 mm) below the ground surface. Where the water table is more than ten feet (10’) (3048 mm) below the ground surface, the water-tight casing shall extend below the table surface. Well casings for dug wells or bored wells constructed with sections of concrete, tile, or galvanized or corrugated metal pipe shall be surrounded by six inches (6”) (152 mm) of grout poured into the hole between the outside of the sassing and the ground and extending not less than ten feet (10’) (3048 mm) below the ground surface. P2902.7.7 Cover. Potable water wells shall be equipped with an overlapping water-tight cover at the top of the well casing or pipe sleeve such that contaminated water or other substances are prevented from entering the well through the annular opening at the top of the well casing, wall or pipe sleeve. Covers shall extend downward not less than two inches (2”) (51 mm) over the outside of the well casing or wall. A dug well cover shall be provided with a pipe sleeve permitting the withdrawal of the pump suction pipe, cylinder or jet body without disturbing the cover. Where pump sections or discharge pipes enter or leave a well through the side of the casing, the circle of contact shall be watertight. P2902.7.8 Drainage. Potable water wells and springs shall be constructed such that surface drainage will be diverted away from the well or spring P2903.3 Delete section P2903.3 Minimum Pressure and substitute the following: P2903.3 Minimum Pressure. Minimum static pressure shall be forty (40) psi measured before any meter, or a booster pump shall be installed after the meter providing forty (40) psi minimum static pressure. For private wells, forty (40) psi minimum shall be provided at the outlet of any storage tank or pump. Delete section P2904 and substitute the following: R2904.1 General. Automatic fire sprinkler if installed at the applicant’s option will be in conformance with Appendix RP. 2.24 Chapter 30 P3003.9.2 Solvent Cementing- Delete Exception P3008.1 Delete section P3008.1 and substitute the following P3008.1 Mandatory installation of check valves. All new residential construction that will connect to a sanitary sewer system and any residential construction where the existing sewer connection will be substantially altered shall have a check valve installed that is automatically activated, on the main building sewer line for purposes of protecting residents from the possible backflow of, and exposure to, untreated sewage. 2.25 Chapter 31 Vents P3103.1 Roof extension: insert the following: Twelve inches (12”) (304.8 mm) Delete IRC P3103.2 Frost Closure and substitute the following: Frost Closure: Each vent extension through a roof shall have a minimum size of three inches (3”) in Providence County and two inches (2”) in all others. Where this results in an increase in size of the vent extension, the change in diameter shall be made inside the building a minimum of six inches (6") below the roof with an approved fitting. 2.26 Chapter 32 Traps P3201.2 Delete and substitute the following: P3201.2 Trap seals and trap seal protection. Traps shall have a liquid seal not less than two inches (2”) (51 mm) and not more than four inches (4”) (102 mm). Traps for floor drains shall be fitted with a trap primer or shall be of the deep seal design. Alternative seals that are in conformance with ASSE 1018 or ASSE 1044 are acceptable. 2.27 Chapter 34 Delete without substitution Part VIII Electrical Chapters 34 through 43 and reference Rhode Island Electrical Code RI-SBC-5 2021 ( Part 5 of this Subchapter ) most recent edition. 2.28 Appendices Add the Following APPENDIX RP – RESIDENTIAL SPRINKLERS Appendix RP is Informative only and is not part of this code SECTION R-P2904 DWELLING UNIT FIRE SPRINKLER SYSTEMS R-P2904.1 General. Where installed, residential fire sprinkler systems, or portions thereof, shall be in accordance with NFPA 13D or Section P2904, which shall be considered equivalent to NFPA 13D. Section P2904 shall apply to stand-alone and multipurpose wet-pipe sprinkler systems that do not include the use of antifreeze. A multipurpose fire sprinkler system shall supply domestic water to both fire sprinklers and plumbing fixtures. A stand-alone sprinkler system shall be separate and independent from the water distribution system. A backflow flow preventer shall not be required to separate a stand-alone sprinkler system from the water distribution system. R-P2904.1.1 Required sprinkler locations. Sprinklers when installed shall protect all areas of a dwelling unit. Exceptions: 1. Attics, crawl spaces and normally unoccupied concealed spaces that do not contain fuel- fired appliances do not require sprinklers. In attics, crawl spaces and normally unoccupied concealed spaces that contain fuel-fired equipment, a sprinkler shall be installed above the equipment; however, sprinklers shall not be required in the remainder of the space. 2. Clothes closets, linen closets and pantries not exceeding twenty-four (24) square feet (2.2 m 2 ) in area, with the smallest dimension not greater than three feet (3’) (915 mm) and having wall and ceiling surfaces of gypsum board. 3. Bathrooms not more than fifty-five (55) square feet (5.1 m 2 ) in area. 4. Garages; carports; exterior porches; unheated entry areas, such as mud rooms, that are adjacent to an exterior door; and similar areas. R-P2904.2 Sprinklers. Sprinklers shall be new listed residential sprinklers and shall be installed in accordance with the sprinkler manufacturer’s installation instructions. R-P2904.2.1 Temperature rating and separation from heat sources. Except as provided for in section P2904.2.2, sprinklers shall have a temperature rating of not less than one hundred thirty-five degrees Fahrenheit (135° F) (fifty-seven degrees Celsius (57° C)) and not more than one hundred seventy degrees Fahrenheit (170° F) (seventy-seven degrees Celsius (77° C)). Sprinklers shall be separated from heat sources as required by the sprinkler manufacturer’s installation instructions. R-P2904.2.2 Intermediate temperature sprinklers. Sprinklers shall have an intermediate temperature rating not less than one hundred seventy-five degrees Fahrenheit (175° F) (seventy-nine degrees Celsius (79° C)) and not more than two hundred twenty-five degrees Fahrenheit (225° F) (one hundred seven degrees Celsius (107° C)) where installed in the following locations: 1. Directly under skylights, where the sprinkler is exposed to direct sunlight. 2. In attics. 3. In concealed spaces located directly beneath a roof. 4. Within the distance to a heat source as specified in Table P2904.2.2 R-P2904.2.3 Freezing areas. Piping shall be protected from freezing as required by section P2603.6. Where sprinklers are required in areas that are subject to freezing, dry-sidewall or dry-pendent sprinklers extending from a nonfreezing area into a freezing area shall be installed. R-P2904.2.4 Sprinkler coverage. Sprinkler coverage requirements and sprinkler obstruction requirements shall be in accordance with sections P2904.2.4.1 and P2904.2.4.2. Table P2904.2.2 – Locations Where Intermediate Temperature Sprinklers are Required Heat Source Range of Distance from Heat Source within which Intermediate Temperature Sprinklers are Required a, b (inches) Fireplace, side of open or recessed fireplace 12 to 36 Fireplace, front of recessed fireplace 36 to 60 Coal and wood burning stove 12 to 42 Kitchen range top 9 to 18 Oven 9 to 18 Vent connector or chimney connector 9 to 18 Heating duct, not insulated 9 to 18 Hot water pipe, not insulated 6 to 12 Side of ceiling or wall warm air register 12 to 24 Front of wall mounted warm air register 18 to 36 Water heater, furnace or boiler 3 to 6 Luminaire up to 250 watts 3 to 6 Luminaire 250 watts up to 499 watts 6 to 12 For SI: 1 inch = 25.4 mm a Sprinklers shall not be located at distances less than the minimum table distance unless the sprinkler listing allows a lesser distance. b Distances shall be measured in a straight line from the nearest edge of the heat source to the nearest edge of the sprinkler R-P2904.2.4.1 Coverage area limit. The area of coverage of a single sprinkler shall not exceed four hundred (400) square feet (37 m 2 ) and shall be based on the sprinkler listing and the sprinkler manufacturer’s installation instructions. R-P2904.2.4.2 Obstructions to coverage. Sprinkler discharge shall not be blocked by obstructions unless additional sprinklers are installed to protect the obstructed area. Sprinkler separation from obstructions shall comply with the minimum distances specified in the sprinkler manufacturer’s instructions. R-P2904.2.4.2.1 Additional requirements for pendent sprinklers. Pendent sprinklers within three feet (3’) (915 mm) of the center of a ceiling fan, surface-mounted ceiling luminaire or similar object shall be considered to be obstructed, and additional sprinklers shall be installed. R-P2904.2.4.2.2 Additional requirements for sidewall sprinklers. Sidewall sprinklers within five feet (5’) (1524 mm) of the center of a ceiling fan, surface-mounted ceiling luminaire or similar object shall be considered to be obstructed, and additional sprinklers shall be installed. R-P2904.2.5 Sprinkler installation on systems assembled with solvent cement. The solvent cementing of threaded adapter fittings shall be completed and threaded adapters for sprinklers shall be verified as being clear of excess cement prior to the installation of sprinklers on systems assembled with solvent cement. R-P2904.2.6 Sprinkler modifications prohibited. Painting, caulking or modifying of sprinklers shall be prohibited. Sprinklers that have been painted, caulked, modified or damaged shall be replaced with new sprinklers. R-P2904.3 Sprinkler piping system. Sprinkler piping shall be supported in accordance with the requirements for cold water distribution piping. Sprinkler piping shall comply with all requirements for cold water distribution piping. For multipurpose piping systems, the sprinkler piping shall connect to and be a part of the cold-water distribution piping system. R-P2904.3.1 Nonmetallic pipe and tubing. Nonmetallic pipe and tubing, such as CPVC and PEX, shall be listed for use in residential fire sprinkler systems. R-P2904.3.1.1 Nonmetallic pipe protection. Nonmetallic pipe and tubing systems shall be protected from exposure to the living space by a layer of not less than three eighths of one inch (3/8”) (9.5 mm) thick gypsum wallboard, one half of one inch (1/2”) inch-thick plywood (13 mm), or other material having a fifteen (15) minute fire rating. Exceptions: 1. Pipe protection shall not be required in areas that do not require protection with sprinklers as specified in section P2904.1.1. 2. Pipe protection shall not be required where exposed piping is permitted by the pipe listing. R-P2904.3.2 Shutoff valves prohibited. With the exception of shutoff valves for the entire water distribution system, valves shall not be installed in any location where the valve would isolate piping serving one or more sprinklers. R-P2904.3.3 Single dwelling limit. Piping beyond the service valve located at the beginning of the water distribution system shall not serve more than one (1) dwelling. R-P2904.3.4 Drain. A means to drain the sprinkler system shall be provided on the system side of the water distribution shutoff valve. R-P2904.4 Determining system design flow. The flow for sizing the sprinkler piping system shall be based on the flow rating of each sprinkler in accordance with section P2904.4.1 and the calculation in accordance with section P2904.4.2. R-P2904.4.1 Determining required flow rate for each sprinkler. The minimum required flow for each sprinkler shall be determined using the sprinkler manufacturer’s published data for the specific sprinkler model based on all of the following: 1. The area of coverage. 2. The ceiling configuration. 3. The temperature rating. 4. Any additional conditions specified by the sprinkler manufacturer. R-P2904.4.2 System design flow rate. The design flow rate for the system shall be based on the following: 1. The design flow rate for a room having only one (1) sprinkler shall be the flow rate required for that sprinkler, as determined by section P2904.4.1. 2. The design flow rate for a room having two (2) or more sprinklers a shall be determined by identifying the sprinkler in that room with the highest required flow rate, based on section P2904.4.1, and multiplying that flow rate by two (2). 3. Where the sprinkler manufacturer specifies different criteria for ceiling configurations that are not smooth, flat and horizontal, the required flow rate for that room shall comply with the sprinkler manufacturer’s instructions. 4. The design flow rate for the sprinkler system shall be the flow required by the room with the largest flow rate, based on Items 1, 2 and 3. 5. For the purpose of this section, it shall be permissible to reduce the design flow rate for a room by subdividing the space into two (2) or more rooms, where each room is evaluated separately with respect to the required design flow rate. Each room shall be bounded by walls and a ceiling. Openings in walls shall have a lintel not less than eight inches (8”) (203 mm) in depth and each lintel shall form a solid barrier between the ceiling and the top of the opening. R-P2904.5 Water supply. The water supply shall provide not less than the required design flow rate for sprinklers in accordance with section P2904.4.2 at a pressure not less than that used to comply with section P2904.6. R-P2904.5.1 Water supply from individual sources. Where a dwelling unit water supply is from a tank system, a private well system or a combination of these, the available water supply shall be based on the minimum pressure control setting for the pump. R-P2904.5.2 Required capacity. The water supply shall have the capacity to provide the required design flow rate for sprinklers for a period of time as follows: 1. Seven (7) minutes for dwelling units one (1) story in height and less than two thousand (2,000) square feet (186 m 2 ) in area. 2. Ten (10) minutes for dwelling units two (2) or more stories in height or equal to or greater than two thousand (2,000) square feet (186 m 2 ) in area. Where a well system, a water supply tank system or a combination thereof is used, any combination of well capacity and tank storage shall be permitted to meet the capacity requirement. R-P2904.6 Pipe sizing. The piping to sprinklers shall be sized for the flow required by section P2904.4.2. The flow required to supply the plumbing fixtures shall not be required to be added to the sprinkler design flow. R-P2904.6.1 Method of sizing pipe. 1. Piping supplying sprinklers shall be sized using the prescriptive method in section P2904.6.2 or by hydraulic calculation in accordance with NFPA 13D. The minimum pipe size from the water supply source to any sprinkler shall be three quarters of one inch (3/4”) (19 mm) nominal. 2. Threaded adapter fittings at the point where sprinklers are attached to the piping shall be a minimum of one half of one inch (1/2”) (13 mm) nominal. R-P2904.6.2 Prescriptive pipe sizing method. Pipe shall be sized by determining the available pressure to offset friction loss in piping and identifying a piping material, diameter and length using the equation in section P2904.6.2.1 and the procedure in section P2904.6.2.2. R-P2904.6.2.1 Available pressure equation. The pressure available to offset friction loss in the interior piping system (Pt) shall be determined in accordance with the Equation 29-1. Pt = Psup–PLsvc–PLm–PLd–PLe–Psp (Equation 29-1) where: Pt = Pressure used in applying Tables P2904.6.2(4) through P2904.6.2(9). Psup = Pressure available from the water supply source. PLsvc = Pressure loss in the water-service pipe. PLm = Pressure loss in the water meter. PLd = Pressure loss from devices other than the water meter. PLe = Pressure loss associated with changes in elevation. Psp = Maximum pressure required by a sprinkler. R-P2904.6.2.2 Calculation procedure. Determination of the required size for water distribution piping shall be in accordance with the following procedure: Step 1 – Determine Psu Obtain the static supply pressure that will be available from the water main from the water purveyor, or for an individual source, the available supply pressure shall be in accordance with section P2904.5.1. Step 2 – Determine PLsvc Use Table P2904.6.2(1) to determine the pressure loss in the water service pipe based on the selected size of the water service. Step 3 – Determine PLm Use Table P2904.6.2(2) to determine the pressure loss from the water meter, based on the selected water meter size. Step 4 – Determine PLd Determine the pressure loss from devices other than the water meter installed in the piping system supplying sprinklers, such as pressure-reducing valves, backflow preventers, water softeners or water filters. Device pressure losses shall be based on the device manufacturer's specifications. The flow rate used to determine pressure loss shall be the rate from section P2904.4.2, except that five (5) gpm (0.3 L/S) shall be added where the device is installed in a water-service pipe that supplies more than one (1) dwelling. As alternative to deducting pressure loss for a device, an automatic bypass valve shall be installed to divert flow around the device when a sprinkler activates. Step 5 – Determine PLe Use Table P2904.6.2(3) to determine the pressure loss associated with changes in elevation. The elevation used in applying the table shall be the difference between the elevation where the water source pressure was measured and the elevation of the highest sprinkler. Step 6 – Determine Psp Determine the maximum pressure required by any individual sprinkler based on the flow rate from section P2904.4.1. The required pressure is provided in the sprinkler manufacturer's published data for the specific sprinkler model based on the selected flow rate. Step 7 – Calculate Pt Using Equation 29-1, calculate the pressure available to offset friction loss in water-distribution piping between the service valve and the sprinklers. Step 8 – Determine the maximum allowable pipe length Use Tables P2904.6.2(4) through P2904.6.2(9) to select a material and size for water distribution piping. The piping material and size shall be acceptable if the developed length of pipe between the service valve and the most remote sprinkler does not exceed the maximum allowable length specified by the applicable table. Interpolation of Pt between the tabular values shall be permitted. The maximum allowable length of piping in Tables P2904.6.2(4) through P2904.6.2(9) incorporates an adjustment for pipe fittings, and no additional consideration of friction losses associated with pipe fittings shall be required. R-P2904.7 Instructions and signs. An owner’s manual for the fire sprinkler system shall be provided to the owner. A sign or valve tag shall be installed at the main shutoff valve to the water distribution system stating the following: “Warning, the water system for this home supplies fire sprinklers that require certain flows and pressures to fight a fire. Devices that restrict the flow or decrease the pressure or automatically shut off the water to the fire sprinkler system, such as water softeners, filtration systems and automatic shutoff valves, shall not be added to this system without a review of the fire sprinkler system by a fire protection specialist. Do not remove this sign.” R-P2904.8 Inspections. The water distribution system shall be inspected in accordance with sections P2904.8.1 and P2904.8.2. R-P2904.8.1 Pre-concealment inspection. The following items shall be verified prior to the concealment of any sprinkler system piping: 1. Sprinklers are installed in all areas as required by section P2904.1.1. 2. Where sprinkler water spray patterns are obstructed by construction features, luminaries or ceiling fans, additional sprinklers are installed as required by section P2904.2.4.2. 3. Sprinklers are the correct temperature rating and are installed at or beyond the required separation distances from heat sources as required by sections P2904.2.1 and P2904.2.2. 4. The pipe size equals or exceeds the size used in applying Tables P2904.6.2(4) through P2904.6.2(9) or, if the piping system was hydraulically calculated in accordance with section P2904.6.1, the size used in the hydraulic calculation. 5. The pipe length does not exceed the length permitted by Tables P2904.6.2(4) through P2904.6.2(9) or, if the piping system was hydraulically calculated in accordance with section P2904.6.1, pipe lengths and fittings do not exceed those used in the hydraulic calculation. 6. Nonmetallic piping that conveys water to sprinklers is listed for use with fire sprinklers. 7. Piping is supported in accordance with the pipe manufacturer’s and sprinkler manufacturer’s installation instructions. 8. The piping system is tested in accordance with section P2503.7. R-P2904.8.2 Final inspection. The following items shall be verified upon completion of the system: 1. Sprinkler are not painted, damaged or otherwise hindered from operation. 2. Where a pump is required to provide water to the system, the pump starts automatically upon system water demand. 3. Pressure-reducing valves, water softeners, water filters or other impairments to water flow that were not part of the original design have not been installed. 4. The sign or valve tag required by section P2904.7 is installed and the owner’s manual for the system is present. Table P2904.6.2(1) – Water Service Pressure Loss (PL svc ) a,b Flow Rate c (gpm) ¾ INCH WATER SERVICE PRESSURE LOSS (psi) 1 INCH WATER SERVICE PRESSURE LOSS (psi) 1 ¼ INCH WATER SERVICE PRESSURE LOSS (psi) Length of water service pipe (feet) Length of water service pipe (feet) Length of water service pipe (feet) 40 or less 41 to 75 76 to 100 101 to 150 40 or less 41 to 75 76 to 100 101 to 150 40 or less 41 to 75 76 to 100 101 to 150 8 5.1 8.7 11.8 17.4 1.5 2.5 3.4 5.1 0.6 1.0 1.3 1.9 10 7.7 13.1 17.8 26.3 2.3 3.8 5.2 7.7 0.8 1.4 2.0 2.9 12 10.8 18.4 24.9 NP 3.2 5.4 7.3 10.7 1.2 2.0 2.7 4.0 14 14.4 24.5 NP NP 4.2 7.1 9.6 14.3 1.6 2.7 3.6 5.4 16 18.4 NP NP NP 5.4 9.1 12.4 18.3 2.0 3.4 4.7 6.9 18 22.9 NP NP NP 6.7 11.4 15.4 22.7 2.5 4.3 5.8 8.6 20 27.8 NP NP NP 8.1 13.8 18.7 27.6 3.1 5.2 7.0 10.4 22 NP NP NP NP 9.7 16.5 22.3 NP 3.7 6.2 8.4 12.4 24 NP NP NP NP 11.4 19.3 26.2 NP 4.3 7.3 9.9 14.6 26 NP NP NP NP 13.2 22.4 NP NP 5.0 8.5 11.4 16.9 28 NP NP NP NP 15.1 25.7 NP NP 5.7 9.7 13.1 19.4 30 NP NP NP NP 17.2 NP NP NP 6.5 11.0 14.9 22.0 32 NP NP NP NP 19.4 NP NP NP 7.3 12.4 16.8 24.8 34 NP NP NP NP 21.7 NP NP NP 8.2 13.9 18.8 NP 36 NP NP NP NP 24.1 NP NP NP 9.1 15.4 20.9 NP For SI: one inch (1”) = 25.4 mm, one foot (1’) = 304.8 mm, one (1) gallon per minute = 0.053 L/s, one (1) pound per square inch = 6.895 kPa. NP – Not permitted. Pressure loss exceeds reasonable limits. a. Values are applicable for underground piping materials listed in Table P2905.4 and are based on an SDR of 11 and a Hazen Williams C Factor of one hundred fifty (150). b. Values include the following length allowances for fittings: twenty-five percent (25%) length increase for actual lengths up to one hundred feet (100’) and fifteen percent (15%) length increase for actual lengths over one hundred feet (100’). c. Flow rate from section P2904.4.2. Add five (5) gpm to the flow rate required by section P2904.4.2 where the water-service pipe supplies more than one (1) dwelling. Table P2904.6.2(2) – Minimum Water Meter Pressure Loss (PL m ) a FLOW RATE (gallons per minute, gpm) b 5/8-INCH METER PRESSURE LOSS (pounds per square inch, psi) ¾-INCH METER PRESSURE LESS (pounds per square inch, psi) 1-INCH METER PRESSURE LOSS (pounds per square inch, psi) 8 2 1 1 10 3 1 1 12 4 1 1 14 5 2 1 16 7 3 1 18 9 4 1 20 11 4 2 22 NP 5 2 24 NP 5 2 26 NP 6 2 28 NP 6 2 30 NP 7 2 32 NP 7 3 34 NP 8 3 36 NP 8 3 For SI: one inch (1”) = 25.4 mm, one (1) pound per square inch = 6.896 kPa, one (1) gallon per minute = 0.063 L/s. NP – Not permitted unless the actual water meter pressure loss is known. a. Table 2904.6.2(2) establishes conservative values for water meter pressure loss or installations where the water meter loss is unknown. Where the actual water meter pressure loss is known, P m shall be the actual loss. b. Flow rate from section P2904.4.2. Add five (5) gpm to the flow rate required by section P2904.4.2 where the water-service pipe supplies more than one (1) dwelling. Table P2904.6.2(3) – Elevation Loss (PL e ) ELEVATION (feet) PRESSURE LOSS (psi) 5 2.2 10 4.4 15 6.5 20 8.7 25 10.9 30 13 35 15.2 40 17.4 For SI: one foot (1’) = 304.8 mm, one (1) pound per square inch = 6.895 kPa. Table P2904.6.2(4) – Allowable Pipe Length for three quarter (3/4) Inch Type M Copper Water Tubing SPRINKLER FLOW RATE a (gpm) WATER DISTRIBUTION SIZE (inch) Available Pressure – P t (psi) 15 20 25 30 35 40 45 50 55 60 Allowable length of pipe from service valve to farthest sprinkler (feet) 8 ¾ 217 289 361 434 506 578 650 723 795 867 9 ¾ 174 232 291 349 407 465 523 581 639 697 10 ¾ 143 191 239 287 335 383 430 478 526 574 11 ¾ 120 160 220 241 281 321 361 401 441 481 12 ¾ 102 137 171 205 239 273 307 241 375 410 13 ¾ 88 118 147 177 206 235 265 294 324 353 14 ¾ 77 103 128 154 180 205 231 257 282 308 15 ¾ 68 90 113 136 158 181 203 226 248 271 16 ¾ 60 80 100 120 140 160 180 200 220 241 17 ¾ 54 72 90 108 125 143 161 179 197 215 18 ¾ 48 64 81 97 113 129 145 161 177 193 19 ¾ 44 58 73 88 102 117 131 146 160 175 20 ¾ 40 53 66 80 93 106 119 133 146 159 21 ¾ 36 48 61 73 85 97 109 121 133 145 22 ¾ 33 44 56 67 78 89 100 111 122 133 23 ¾ 31 41 51 61 72 82 92 102 113 123 24 ¾ 28 38 47 57 66 76 85 95 104 114 25 ¾ 26 35 44 53 61 70 79 88 97 105 26 ¾ 24 33 41 49 57 65 73 82 90 98 27 ¾ 23 30 38 46 53 61 69 76 84 91 28 ¾ 21 28 36 43 50 57 64 71 78 85 29 ¾ 20 27 33 40 47 53 60 67 73 80 30 ¾ 19 25 31 38 44 50 56 63 69 75 31 ¾ 18 24 29 35 41 47 53 59 65 71 32 ¾ 17 22 28 33 39 44 50 56 61 67 33 ¾ 16 21 26 32 37 42 47 53 58 63 34 ¾ NP 20 25 30 35 40 45 50 55 60 35 ¾ NP 19 24 28 33 38 42 47 52 57 36 ¾ NP 18 22 27 31 36 40 45 49 54 37 ¾ NP 17 21 26 30 34 38 43 47 51 38 ¾ NP 16 20 24 28 32 36 40 45 49 39 ¾ NP 15 19 23 27 31 35 39 42 46 40 ¾ NP NP 18 22 26 29 33 37 40 44 For SI: one inch (1”) = 25.4 mm, one foot (1’) = 304.8 mm, one (1) pound per square inch = 6.895 kPa, one (1) gallon per minute – 0.963 L/s. NP – Not permitted a. Flow rate from section P2904.4.2. Table P2904.6.2(5) – Allowable Pipe Length for 1-inch Type M Copper Water TubingSPRINKLER FLOW RATEa (gpm) WATER DISTRIBUTION SIZE (inch) Available Pressure – P t (psi) 15 20 25 30 35 40 45 50 55 60 Allowable length of pipe from service valve to farthest sprinkler (feet) 8 1 806 1075 1343 1612 1881 2149 2418 2687 2955 3224 9 1 648 864 1080 1296 1512 1728 1945 2161 2377 2593 10 1 533 711 889 1067 1245 1422 1600 1778 1956 2134 11 1 447 586 745 894 1043 1192 1341 1491 1640 1789 12 1 381 508 634 761 888 1015 1142 1269 1396 1523 13 1 328 438 547 657 766 875 985 1094 1204 1313 14 1 286 382 477 572 668 763 859 954 1049 1145 15 1 252 336 420 504 588 672 756 840 924 1008 16 1 224 298 373 447 522 596 671 745 820 894 17 1 200 266 333 400 466 533 600 666 733 799 18 1 180 240 300 360 420 479 539 599 659 719 19 1 163 217 271 325 380 434 488 542 597 651 20 1 148 197 247 296 345 395 444 493 543 592 21 1 135 180 225 270 315 360 406 451 496 541 22 1 124 165 207 248 289 331 372 413 455 496 23 1 114 152 190 228 267 305 343 381 419 457 24 1 106 141 176 211 246 282 317 352 387 422 25 1 98 131 163 196 228 261 294 326 359 392 26 1 91 121 152 182 212 243 273 304 334 364 27 1 85 113 142 170 198 226 255 283 311 340 28 1 79 106 132 159 185 212 238 265 291 318 29 1 74 99 124 149 174 198 223 248 273 298 30 1 70 92 116 140 163 186 210 233 256 280 31 1 66 88 110 132 153 175 197 219 241 263 32 1 62 83 103 124 145 165 186 207 227 248 33 1 59 78 98 117 137 156 176 195 215 234 34 1 55 74 92 111 129 148 166 185 203 222 35 1 53 70 88 105 123 140 158 175 193 210 36 1 50 66 83 100 116 133 150 166 183 199 37 1 47 63 79 95 111 126 142 158 174 190 38 1 45 60 75 90 105 120 135 150 165 181 39 1 43 57 72 86 100 115 129 143 158 172 40 1 41 55 68 82 96 109 123 137 150 164 For SI: one inch (1”) = 25.4 mm, one foot (1’) = 304.8 mm, one (1) pound per square inch = 6.895 kPa, one (1) gallon per minute – 0.963 L/s. a. Flow rate from Section P2904.4.2. Table P2904.6.2(6) – Allowable Pipe Length for ¾-inch CPVC Pipe SPRINKLER FLOW RATE a (gpm) WATER DISTRIBUTION SIZE (inch) Available Pressure – P t (psi) 15 20 25 30 35 40 45 50 55 60 Allowable length of pipe from service valve to farthest sprinkler (feet) 8 ¾ 348 465 581 697 813 929 1045 1161 1278 1394 9 ¾ 280 374 467 560 654 747 841 934 1027 1121 10 ¾ 231 307 384 461 538 615 692 769 845 922 11 ¾ 193 258 322 387 451 515 580 644 709 773 12 ¾ 165 219 274 329 384 439 494 549 603 658 13 ¾ 142 189 237 284 331 378 426 473 520 568 14 ¾ 124 165 206 247 289 330 371 412 454 495 15 ¾ 109 145 182 218 254 290 327 363 399 436 16 ¾ 97 129 161 193 226 258 290 322 354 387 17 ¾ 86 115 144 173 202 230 259 288 317 346 18 ¾ 78 104 130 155 181 207 233 259 285 311 19 ¾ 70 94 117 141 164 188 211 234 258 281 20 ¾ 64 85 107 128 149 171 192 213 235 256 21 ¾ 58 78 97 117 136 156 175 195 214 234 22 ¾ 54 71 89 107 125 143 161 179 197 214 23 ¾ 49 66 82 99 115 132 148 165 181 198 24 ¾ 46 61 76 91 107 122 137 152 167 183 25 ¾ 42 56 71 85 99 113 127 141 155 169 26 ¾ 39 52 66 79 92 105 118 131 144 157 27 ¾ 37 49 61 73 86 98 110 122 135 147 28 ¾ 34 46 57 69 80 92 103 114 126 137 29 ¾ 32 43 54 64 75 86 96 107 118 129 30 ¾ 30 40 50 60 70 81 91 101 111 121 31 ¾ 28 38 47 57 66 76 85 95 104 114 32 ¾ 27 36 45 54 63 71 80 89 98 107 33 ¾ 25 34 42 51 59 68 76 84 93 101 34 ¾ 24 32 40 48 56 64 72 80 88 96 35 ¾ 23 30 38 45 53 61 68 76 83 91 36 ¾ 22 29 36 43 50 57 65 72 79 86 37 ¾ 20 27 34 41 48 55 61 68 75 82 38 ¾ 20 26 33 39 46 52 59 65 72 78 39 ¾ 19 25 31 37 43 50 56 62 68 74 40 ¾ 18 24 30 35 41 47 53 59 65 71 For SI: one inch (1”) = 25.4 mm, one foot (1’) – 304.8 mm, one (1) pound per square inch – 6.895 kPa, one (1) gallon per minute = 0.0963 L/s. a. Flow rate from Section P2904.4.2. Table P2904.6.2(7) – Allowable Pipe Length for 1-inch CPVC Pipe SPRINKLER FLOW RATEa (gpm) WATER DISTRIBUTION SIZE (inch) Available Pressure – P t (psi) 15 20 25 30 35 40 45 50 55 60 Allowable length of pipe from service valve to farthest sprinkler (feet) 8 1 1049 1398 1748 2098 2447 2797 3146 3496 3845 4195 9 1 843 1125 1406 1687 1968 2249 2530 2811 3093 3374 10 1 694 925 1157 1388 1619 1851 2082 2314 2545 2776 11 1 582 776 970 1164 1358 1552 1746 1940 2133 2327 12 1 495 660 826 991 1156 1321 1486 1651 1816 1981 13 1 427 570 712 854 997 1139 1281 1424 1566 1709 14 1 372 497 621 745 869 993 1117 1241 1366 1490 15 1 328 437 546 656 765 874 983 1093 1202 1311 16 1 291 388 485 582 679 776 873 970 1067 1164 17 1 260 347 433 520 607 693 780 867 954 1040 18 1 234 312 390 468 546 624 702 780 858 936 19 1 212 282 353 423 494 565 635 706 776 847 20 1 193 247 321 385 449 513 578 642 706 770 21 1 176 235 293 352 410 469 528 586 645 704 22 1 1161 215 269 323 377 430 484 538 592 646 23 1 1149 198 248 297 347 396 446 496 545 595 24 1 137 183 229 275 321 366 412 458 504 550 25 1 1127 170 212 255 297 340 382 425 467 510 26 1 118 158 197 237 276 316 355 395 434 474 27 1 111 147 184 221 258 295 332 368 405 442 28 1 103 138 172 207 241 275 310 344 379 413 29 1 97 129 161 194 226 258 290 323 355 387 30 1 91 121 152 182 212 242 273 303 333 364 31 1 86 114 143 171 200 228 257 285 314 342 32 1 81 108 134 161 188 215 242 269 296 323 33 1 176 102 127 152 178 203 229 254 280 305 34 1 72 96 120 144 168 192 216 240 265 289 35 1 68 91 114 137 160 182 205 228 251 273 36 1 165 87 108 130 151 173 195 216 238 260 37 1 62 82 103 123 144 165 185 206 226 247 38 1 59 78 98 117 137 157 176 196 215 235 39 1 56 75 93 112 131 149 168 187 205 224 40 1 53 71 89 107 125 142 160 178 196 214 For SI: one inch (1”) = 25.4 mm, one foot (1’) = 304.8 mm, one (1) pound per square inch = 6.895 kPa, one (1) gallon per minute = 0.963 L/s. a. Flow rate from Section P2904.4.2. Table P2904.6.2(8) – Allowable Pipe Length for ¾-inch PEX Tubing SPRINKLER FLOW RATE a (gpm) WATER DISTRIBUTION SIZE (inch) Available Pressure – P t (psi) 15 20 25 30 35 40 45 50 55 60 Allowable length of pipe from service valve to farthest sprinkler (feet) 8 ¾ 93 123 154 185 216 247 278 309 339 370 9 ¾ 74 99 124 149 174 199 223 248 273 298 10 ¾ 61 82 102 123 143 163 184 204 225 245 11 ¾ 51 68 86 103 120 137 154 171 188 205 12 ¾ 44 58 73 87 102 117 131 146 160 175 13 ¾ 38 50 63 75 88 101 113 126 138 151 14 ¾ 33 44 55 66 77 88 99 110 121 132 15 ¾ 29 39 48 58 68 77 87 96 106 116 16 ¾ 26 34 43 51 60 68 77 86 94 103 17 ¾ 23 31 38 46 54 61 69 77 84 92 18 ¾ 21 28 34 41 48 55 62 69 76 83 19 ¾ 19 25 31 37 44 50 56 62 69 75 20 ¾ 17 23 28 34 40 45 51 57 62 68 21 ¾ 16 21 26 31 36 41 47 52 57 62 22 ¾ NP 19 24 28 33 38 43 47 52 57 23 ¾ NP 17 22 26 31 35 39 44 48 52 24 ¾ NP 16 20 24 28 32 36 40 44 49 25 ¾ NP NP 19 22 26 30 34 37 41 45 26 ¾ NP NP 17 21 24 28 31 35 38 42 27 ¾ NP NP 16 20 23 26 29 33 36 39 28 ¾ NP NP 15 18 21 24 27 30 33 36 29 ¾ NP NP NP 17 20 23 26 28 31 34 30 ¾ NP NP NP 16 19 21 24 27 29 32 31 ¾ NP NP NP 15 18 20 23 25 28 30 32 ¾ NP NP NP NP 17 19 21 24 26 28 33 ¾ NP NP NP NP 16 18 20 22 25 27 34 ¾ NP NP NP NP NP 17 19 21 23 25 35 ¾ NP NP NP NP NP 16 18 20 22 24 36 ¾ NP NP NP NP NP 15 17 19 21 23 37 ¾ NP NP NP NP NP NP 16 18 20 22 38 ¾ NP NP NP NP NP NP 16 17 19 21 39 ¾ NP NP NP NP NP NP NP 16 18 20 40 ¾ NP NP NP NP NP NP NP 16 17 19 For SI: one inch (1”) = 25.4 mm, one foot (1’) = 304.8 mm, one (1) pound per square inch = 6.895 kPa, one (1) gallon per minute = 0.963 L/s. NP – Not permitted. a. Flow rate from Section P2904.4.2. Table P2904.6.2(9) – Allowable Pipe Length for 1-inch PEX Tubing SPRINKLER FLOW RATEa (gpm) WATER DISTRIBUTION SIZE (inch) Available Pressure – P t (psi) 15 20 25 30 35 40 45 50 55 60 Allowable length of pipe from service valve to farthest sprinkler (feet) 8 1 314 418 523 628 732 837 941 1046 1151 1255 9 1 252 336 421 505 589 673 757 841 925 1009 10 1 208 277 346 415 485 554 623 692 761 831 11 1 174 232 290 348 406 464 522 580 638 696 12 1 148 198 247 296 346 395 445 494 543 593 13 1 128 170 213 256 298 341 383 426 469 511 14 1 111 149 186 223 260 297 334 371 409 446 15 1 98 131 163 196 229 262 294 327 360 392 16 1 87 116 145 174 203 232 261 290 319 348 17 1 78 104 130 156 182 208 233 259 285 311 18 1 70 93 117 140 163 187 210 233 257 280 19 1 63 84 106 127 148 169 190 211 232 253 20 1 58 77 96 115 134 154 173 192 211 230 21 1 53 70 88 105 123 140 158 175 193 211 22 1 48 64 80 97 113 129 145 161 177 193 23 1 44 59 74 89 104 119 133 148 163 178 24 1 41 55 69 82 96 110 123 137 151 164 25 1 38 51 64 76 89 102 114 127 140 152 26 1 35 47 59 71 83 95 106 118 130 142 27 1 33 44 55 66 77 88 99 110 121 132 28 1 31 41 52 62 72 82 93 103 113 124 29 1 29 39 48 58 68 77 87 97 106 116 30 1 27 36 45 54 63 73 82 91 100 109 31 1 26 34 43 51 60 68 77 85 94 102 32 1 24 32 40 48 56 64 72 80 89 97 33 1 23 30 38 46 53 61 68 76 84 91 34 1 22 29 36 43 50 58 65 72 79 86 35 1 20 27 34 41 48 55 61 68 75 82 36 1 19 26 32 39 45 52 58 65 71 78 37 1 18 25 31 37 43 49 55 62 68 74 38 1 18 23 29 35 41 47 53 59 64 70 39 1 17 22 28 33 39 45 50 56 61 67 40 1 16 21 27 32 37 43 48 53 59 64 For SI: one inch (1”) = 25.4 mm, one foot (1’) = 304.8 mm, one (1) pound per square inch = 6.895 kPa, one (1) gallon per minute = 0.963 L/s. a. Flow rate from Section P2904.4.2. 2.29 Appendix AA Add the following new Appendix AA: AA 100 HIGH WIND PRESCRIPTIVE DESIGN AA 101.1 General. This appendix contains prescriptive solutions for compliance on wind path load transfer requirements and shall be used only within the limitations of section AA101.2. AA 101.2 Conditions of use. The prescriptive solutions specified in the following sections shall not be permitted to be used in the following conditions: (1) Buildings and structures of any size in one hundred ten (110) MPH or one hundred twenty (120) MPH wind zones located in a V zone as determined by community FIRMS. (2) Two (2) or more story buildings and structures of any size located in one hundred twenty (120) MPH wind zone with more than twenty percent (20%) exterior fenestration. (3) Two (2) or more story structures with a building height greater than thirty-three feet (33’) as measured from Grade Plane to the average height of the highest roof surface. (4) Any two (2) or more-story structure or building with opening fenestration greater than forty percent (40%) on any one (1) wall. AA 202 Roofs AA 202.1 Scope. The following applies to structures conventionally framed or to truss-type roofs. AA 202.2 Roof Sheathing. Roof sheathing shall be not less than seven sixteenths of one inch (7/16”) finished thickness. AA 202.3 Roof nailing. Roof attachment shall be accomplished with minimum 8d ring shank nails as follows: (1) In the four foot (4’) foot perimeter edge zone along the edges: six inches (6”) o/c (2) To the intermediate supports within the four foot (4’) foot perimeter edge zone: six inches (6”) o/c (3) Along the gable end wall or rake: four inches (4”) o/c (4) All other areas: six inches (6”) o/c edge; twelve inches (12”) o/c intermediate. All sheathing edges within the four foot (4’) perimeter edge zone shall be blocked with two (2) by three (3) minimum including the ridge line and soffit/fascia area. Provisions for ventilation air shall be maintained. Exception: Two (2) by three (3) intermediate blocking can be eliminated provided all sheathing is five eighths of one inch (5/8”) nominal tongue and groove structural panels. AA 202.4 Ridge Straps. Ridge straps one and one quarter inch (1 1/4”) x twenty (20) gage shall be attached to each pair of opposing rafters with 5-8d nails at each end into the framing member. Exceptions: 1. Ridge straps are not required when collar ties of nominal one (1) by six (6) or two (2) by four (4) lumber are located within the upper third of the attic space and attached to each rafter with 3-10 d nails 2. Trusses without a framed ridge connection. 3. Plywood gussets of equivalent cross section. 4. Other engineered connections. 5. At hips, straps shall be installed so each hip jack is connected across the hip line with at least 1-8d into an opposite framing member. AA 202.5 Rake and eave overhangs. Overhangs shall be limited to twenty-four inches (24”). Ladder style rake overhangs attached to the gable end walls shall be limited to twelve inches (12”). Cantilevered rake overhangs at gable end walls shall be limited to twenty-four inches (24”). AA 202.6 Roof assembly to wall assembly. See section R802.11. Exception: Roof truss to wall connection shall be designed to withstand either the load requirements of Table R802.11 or the connection loads indicated on the truss design shop drawings, whichever is greater. AA 203 Walls AA 203.1 Wall sheathing. Wall sheathing shall be a minimum seven sixteenths of one inch (7/16”) structural panel. Nailing shall be in accordance with Table R602.3 (1) and the following: At the top plate or plates, the sheathing shall extend from the top of the top plate to a minimum of sixteen inches (16”) beyond the stud-to-bottom of the top plate connection. A minimum of four (4) nails shall be used at each stud fastening, and edge-nailed to each plate at six inches (6”) o/c. Alternate: prefabricated and pre-engineered connection straps approved by the Building Official. If the studs are not continuous to the foundation plate such as at an intermediate floor, the wall sheathing shall be continuous and uninterrupted for a distance of sixteen inches (16”) beyond from top of bottom wall plate to sixteen inches (16”) beyond bottom of bottom wall top plate below, with a minimum of four (4) nails at each stud, and field-nailed at six inches (6”) o/c to floor joist header framing. Alternate: Prefabricated and pre-engineered connection anchors or fasteners approved by the Building Official. At the bottom of the wall assembly to the foundation sill plate, the wall sheathing shall be continuous from a point sixteen inches (16”) above the top of the bottom wall plate to the bottom of the foundation sill, with a minimum of four (4) nails at each stud, six inches (6”) field nailed, and edge nailed to the foundation sill plate at six inches (6”) o/c. Alternate: Prefabricated pre-engineered connection anchors or fasteners approved by the Building Official. AA 203.2 Shear Walls. A four foot (4’) segment of wall sheathing shall be designated as a shear wall at each corner of the structure at each floor, and no more than twenty-four feet (24’) apart along a wall length. The following additional requirements apply: 1. No openings are permitted within this four foot (4’) section. Exception: Window openings are allowed no closer than two feet (2’) to corner providing the length of that shear panel is increased to eight feet (8’). 2. All edges shall be blocked and nailed at six inches (6”) o/c, and field-nailed at six inches (6”) o/c. 3. Studs shall be doubled at each end of the shear wall panel. AA 203.2.1 Shear wall hold-downs. First (1 st ) story shear walls shall be connected to the foundation below with connection anchoring capable of three thousand five hundred (3,500) lb. hold-down capacity, in addition to conventional foundation anchor bolt requirements in the remainder of the panel. The hold downs shall be fastened to each end of the shear wall at the double stud. Exceptions 1. Shear wall hold-downs shall not be required in wind zones I or II (one hundred (100) mph or one hundred ten (110) mph). 2. Shear wall anchors shall not be required provided one half inch (½”) anchor bolts at forty-eight inches (48”) o/c max are installed with the top of the bolts anchored through the floor system to the bottom plate of the exterior wall frame for the entire foundation perimeter. AA 203.3 Foundation anchor bolts. Anchor bolts shall be installed in accordance with section R403.1.6 and the following: 1 + 2 story buildings ½” @ 48” o/c or 5/8” @ 72” o/c 3 story building ½” @ 24” o/c or 5/8” @ 36” o/c Alternate Prefabricated and pre-engineered connections in design and quantity sufficient to equal strength of anchor bolt specification above. Exception. See Exception #2 to AA 203.2.1 above. 203.4 Wall Framing. AA203.4.1. Wind Zone For wind zone 2 (one hundred ten (110) mph) and zone 3 (one hundred twenty (120) mph) the following conditions apply: Exterior bearing and non-bearing walls greater than ten feet (10’) in height shall be two (2) by six (6) at sixteen inches (16”) o/c min. Walls with a total height greater than ten feet (10’) shall be permitted to use two (2) by four (4) at sixteen inches (16”) o/c providing the wall is limited to ten feet (10’) in length and the individual studs are not greater than nine feet (9’) in length. AA203.4.2 Garage doors. In wind zone 3 (one hundred twenty (120) mph) garage doors shall be limited to nine feet (9’) by eight feet (8’) nominal. AA204 Deviations. AA204.1 Deviations. Deviations from the above prescriptive requirements shall only be permitted if stamped calculations and drawings are provided by a Rhode Island registered professional engineer for alternative connections.