{"id":3778,"date":"2014-05-22T08:43:02","date_gmt":"2014-05-22T12:43:02","guid":{"rendered":"http:\/\/www.constructionspecifier.com\/?p=3778"},"modified":"2017-06-26T09:12:22","modified_gmt":"2017-06-26T13:12:22","slug":"clarification-on-wall-systems-article","status":"publish","type":"post","link":"https:\/\/www.constructionspecifier.com\/clarification-on-wall-systems-article\/","title":{"rendered":"Clarification on wall systems article"},"content":{"rendered":"<p><em>The April 2013 issue of <\/em>The Construction Specifier<em> included a technical feature by J.W. Mollohan, CSI, CCPR, CEP, LEED GA, entitled, \u201c<a href=\"http:\/\/www.constructionspecifier.com\/ibc\/exterior-wall-assemblies-are-you-getting-what-you-specified\">Exterior Wall Assemblies: Are You Getting What You Specified?<\/a>\u201d\u00a0<\/em> <em>We received the following letter from Cliff Black, a CSI member and a building envelope product manager for Firestone Building Products.<\/em><\/p>\n<p>I am writing in regard to the article on exterior wall assemblies. I agree with the author the issue is certainly a challenging one for the design and specifying community. I would like to cite the bracketed statement at the top of page 57, which states, \u201cbuildings of two stories or more.\u201d This appears to be taken in the context of the design of National Fire Protection Association (NFPA) 285, <em>Standard Fire Test Method for Evaluation of Fire Propagation Characteristics of Exterior Non-load-bearing Wall Assemblies Containing Combustible Components<\/em>, addressing multi-story fire propagation.<\/p>\n<p>However, the <em>International Building Code<\/em> (<em>IBC<\/em>) 2603.5 states NFPA 285 is required for buildings of any height for Types I through IV construction incorporating combustible plastic insulation in the exterior wall assembly. <em>IBC <\/em>Chapter 14 (\u201cExterior Walls\u201d) calls for differing requirements for water-resistant barriers (WRBs) and various combustible claddings, qualified by height.<\/p>\n<p>In this case, I believe the statement should read \u201cbuildings of any height,\u201d rather than \u201cbuildings of two stories or more.\u201d<\/p>\n<p><em>Mr. Mollohan replied to Mr. Black, and has allowed us to share it with other readers of the magazine:<\/em><\/p>\n<p>Good catch, Clint! You are absolutely correct that one must be familiar with multiple chapters of the <em>IBC <\/em>to determine whether an NFPA 285 test is required. My error, and your correction, illustrates the difficulty of this provision. I am attaching an adaptation of a flow chart originally created by Barbara Horwitz-Bennett of DuPont Building Innovations for guidance to interested readers:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-3780\" src=\"http:\/\/www.constructionspecifier.com\/wp-content\/uploads\/2014\/05\/Diagram_edited-1.jpg\" alt=\"Diagram_edited-1\" width=\"459\" height=\"345\" srcset=\"https:\/\/www.constructionspecifier.com\/wp-content\/uploads\/2014\/05\/Diagram_edited-1.jpg 459w, https:\/\/www.constructionspecifier.com\/wp-content\/uploads\/2014\/05\/Diagram_edited-1-300x225.jpg 300w\" sizes=\"auto, (max-width: 459px) 100vw, 459px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The April 2013 issue of The Construction Specifier included a technical feature by J.W. Mollohan, CSI, CCPR, CEP, LEED GA, entitled, \u201cExterior Wall Assemblies: Are You Getting What You Specified?\u201d <\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2,179,187,264,265],"tags":[112,1877,81,736,908],"class_list":["post-3778","post","type-post","status-publish","format-standard","hentry","category-matter-of-spec","category-masterformat","category-07-00-00-thermal-and-moisture-protection","category-07-20-00-thermal-protection","category-07-25-00-weather-barriers","tag-eifs","tag-ibc","tag-nfpa","tag-walls","tag-wrb","entry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Clarification on wall systems article - The Construction Specifier<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.constructionspecifier.com\/clarification-on-wall-systems-article\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Clarification on wall systems article - The Construction Specifier\" \/>\n<meta property=\"og:description\" content=\"The April 2013 issue of The Construction Specifier included a technical feature by J.W. 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