F103. PASSIVE RADON-RESISTANT SYSTEM REQUIREMENTS

AF103 PASSIVE RADON-RESISTANT SYSTEM REQUIREMENTS Strike Section AF103.3.2 in Appendix F of the International Residential Code in its entirety and insert new Section AF103.3.2 in Appendix F of the Residential Code in its place to read as follows: AF103.3.2 “T” fitting and vent pipe. A 3 or 4-inch “T” fitting shall be inserted beneath the soil-gas-retarder and be connected to a vent pipe. The vent pipe shall extend through the conditioned space of the dwelling and terminate not less than 12 inches (305 mm) above the roof in a location not less than 10 feet (3048 mm) away from any window or other opening into the conditioned spaces of the building that is less than 2 feet (610 mm) below the exhaust point. Install at least one vertical pipe every 4,000 square feet (186 to 371 square meters) of footprint area. Strike Section AF 103.4.3 in Appendix F of the International Residential Code in its entirety and insert new Section AF103.4.3 in Appendix F of the Residential Code in its place to read as follows: AF103.4.3 “T” fitting and vent pipe. Before a slab is cast or other floor system is installed, a 3- or 4-inch “T” fitting shall be inserted below the slab or other floor system and the soil-gas-retarder. The “T” fitting shall be connected to a 3- or 4-inch vent pipe. The vent pipe shall extend through the conditioned space of the dwelling and terminate not less than 12 inches (305 mm) above the roof in a location not less than 10 feet (3048 mm) away from any window or other opening into the conditioned spaces of the building that is less than 2 feet (610 mm) below the exhaust point. Install at least one vertical pipe every 4,000 square feet (186 to 371 square meters) of slab area. Strike Section AF103.10 in Appendix F of the International Residential Code in its entirety and insert new Section AF103.10 in Appendix F of the Residential Code in its place to read as follows: AF103.10 Power source and access for future radon fan. To provide for future installation of an in-line radon fan, an electrical circuit terminated in an approved box shall be installed on the top floor of the building or the attic, whichever is taller, during construction in the anticipated location of the radon fan. The location shall be an accessible clear space 24 inches (610 mm) in diameter by 3 feet (914 mm) in height adjacent to the vent pipe. SOURCE: Final Rulemaking published at 67 DCR 6033 (May 29, 2020 – Part 2). The District of Columbia Residential Code (2017), referred to as the “Residential Code,” consists of the 2015 edition of the International Residential Code (International Residential Code), published by the International Code Council (ICC), as amended by the Residential Code Supplement of 2017 (12-B DCMR). The International Residential Code is copyrighted by the ICC and therefore is not republished here. However, a copy of the text may be obtained at https://codes.iccsafe.org/public/document/IRC2015. District of Columbia Municipal Regulations Residential Code Supplement of 2017 12-B DCMR § AF103