D.C. Mun. Regs. tit. 12, app 12-B-F r. 12-B-F101
Current through Register Vol. 71, No. 44, November 1, 2024
Strike Section AF101.1 in Appendix F of the International Residential Code in its entirety and insert new Section AF101.1 in Appendix F of the Residential Code in its place to read as follows:
AF101.1 General. Radon-resistant construction built in accordance with Section AF103 is required for new construction. These requirements are intended to provide a passive means of resisting radon gas entry and prepare the dwelling for post-construction radon mitigation, if necessary (see Figure AF102). Additions and Level 3 alterations should test their homes for radon and make radon testing results available upon request by the code official at permitting. If the testing results show 4 or more picocuries per liter (pCi/L) of radon, a radon system compliant with AF103 shall be installed for the work area. Exception: Additions less than 100 square feet.
FIGURE AF101 RADON-RESISTANT CONSTRUCTION DETAILS FOR FOUR
FOUNDATION TYPES
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D.C. Mun. Regs. tit. 12, app 12-B-F r. 12-B-F101
Final Rulemaking published at 67 DCR 5679 (5/29/2020)