D.C. Mun. Regs. tit. 12, r. 12-A2603
Current through Register Vol. 72, No. 2, January 10, 2025
Rule 12-A2603 - FOAM PLASTIC INSULATION2603.5.5Vertical and lateral fire propagation. The exterior wall assembly shall be tested in accordance with and comply with the acceptance criteria of NFPA 285.
Exceptions:
1. One-story buildings complying with Section 2603.4.1.4.
2. Wall assemblies where the foam plastic insulation is covered on each face by not less than 1- inch (25 mm) thickness of masonry or concrete and meeting one of the following:
2.1. There is no airspace between the insulation and the concrete or masonry.
2.2. The insulation has a flame spread index of not more than 25 as determined in accordance with ASTM E84 or UL 723 and the maximum airspace between the insulation and the concrete or masonry is not more than 1 inch (25 mm).
D.C. Mun. Regs. tit. 12, r. 12-A2603
Final Rulemaking published at 61 DCR 2782 (March 28, 2014 Part 2); amended by Final Rulemaking published at 65 DCR 6836 (6/22/2018)The District of Columbia Building Code (2013), referred to as the SBuilding Code, consists of the 2012 edition of the International Building Code as amended by the District of Columbia Building Code Supplement (2013)(12 DCMR A). The International Building Code is copyrighted by the International Code Council and therefore is not republished here. However, a copy of the text may be obtained at: http://publicecodes.cyberregs.com/icod/ibc/2012/index.htm?bu=IC-P-2012-000001&bu2=IC-P-2012-000019.Authority: Section 10 of the Construction Codes Approval and Amendments Act of 1986 (Act), effective March 21, 1987 (D.C. Law 6-216; D.C. Official Code § 6-1409 (2012 Repl.)) and Mayor"s Order 2009-22, dated February 25, 2009, as amended.