WAC 296-52-70025. Construction for Type 2 magazines

(1) Exterior, doors, and top openings. (a) The exterior and doors must be constructed of at least 1/4-inch steel and lined with a minimum of three-inch hardwood. (b) Magazines with top openings must have lids with water resistant seals or lids that overlap the sides by a minimum of one inch when closed. (2) Hinges and hasps. Hinges and hasps must be installed so they cannot be removed when the doors are closed and locked by: (a) Welding; (b) Riveting; or (c) Bolting nuts on the inside of the door. (3) Locks. (a) Each door must be equipped with: (i) Two mortise locks; (ii) Two padlocks fastened in separate hasps and staples; (iii) A combination of mortise lock and a padlock; (iv) A mortise lock that requires two keys to open; or (v) A three-point lock. (b) Padlocks must have: (i) A minimum of five tumblers and a case hardened shackle with a minimum of 3/8-inch diameter; (ii) A minimum of 1/4-inch steel hoods constructed to prevent sawing or lever action on the locks, hasps, and staples. Note: These requirements do not apply to magazine doors that are adequately secured on the inside by means of a bolt, lock, or bar that cannot be operated from the outside. (4) Ventilation. (a) A two-inch air space must be left around ceilings and the perimeter of floors, except at doorways; (b) Foundation ventilators must be at least four inches by six inches; (c) Vents in the foundation, roof, or gables must be screened and offset. (5) Exposed metal. (a) Sparking metal cannot be exposed below the top of walls in the storage facilities; (b) All nails must be blind nailed, countersunk, or nonsparking. Note: The following are nonmandatory construction alternatives for magazine exteriors: 1. All steel and wood dimensions shown are actual thickness; 2. The manufacturer's represented thickness may be used to meet the concrete block and brick dimensions. 3/16 (c) 3/16-inch steel lined with an interior of 4-inch hardwood. (d) 3/16-inch steel lined with: (i) An interior of 7 inches of softwood; or (ii) 6 3/4 inches of plywood. (e) 3/16-inch steel lined with: (i) An intermediate layer of 3-inch hardwood; and (ii) An interior lining of 3/4-inch plywood. 1/8 (f) 1/8-inch steel lined with an interior of 5-inch hardwood. (g) 1/8-inch steel lined with an interior of 9-inch softwood. (h) 1/8-inch steel lined with: (i) An intermediate layer of 4-inch hardwood; and (ii) An interior lining of 3/4-inch plywood. (i) Reserved. (j) 1/8-inch steel lined with: (i) A first intermediate layer of 3/4-inch plywood; (ii) A second intermediate layer of 3 5/8 inches well-tamped dry sand; or (iii) Sand/cement mixture. (6) An interior lining of 3/4-inch plywood. (a) 5/8-inch steel lined with an interior of any type of nonsparking material. (b) 1/2-inch steel lined with an interior of at least 3/8-inch plywood. (c) 3/8-inch steel lined with an interior of 2-inch hardwood. (d) 3/8-inch steel lined with an interior of: (i) 3 inches softwood; or (ii) 2 1/4 inches of plywood. (e) 1/4-inch steel lined with: (i) An interior of 5 inches of softwood; or (ii) 5 1/4 inches of plywood. (f) Any type of structurally sound fire resistant material lined with: (i) An intermediate layer of 4-inch solid concrete block; or (ii) 4-inch solid brick or concrete; and (iii) An interior lining of 1/2-inch plywood placed securely against the masonry lining. (g) Standard 8-inch concrete block with voids filled with well tamped sand/cement mixture. (h) Standard 8-inch solid brick. (i) Reserved. (j) Any type of structurally sound fire resistant material lined with an intermediate 6-inch space filled with: (i) Well tamped dry sand; or (ii) Well tamped sand/cement mixture. (k) Any type of fire resistant material lined with: (i) A first intermediate layer of 3/4-inch plywood; (ii) A second intermediate layer of 3 5/8-inch well tamped dry sand; or (iii) Sand/cement mixture; (iv) A third intermediate layer of 3/4-inch plywood; (v) A fourth intermediate layer of 2-inch hardwood; or (vi) 14 gauge steel and an interior lining of 3/4-inch plywood; (vii) 8-inch thick solid concrete.