BCAB #1683 - Protection of Foamed Plastic on the Exposing Building Face,
December 16, 2010
Re:Protection of Foamed Plastic on the Exposing Building Face,
The project in question is a sprinklered building with office and medium hazard industrial occupancies. The limiting distances from all four exposing building faces are such as to permit 100% unprotected openings.
Reason for Appeal
Article 188.8.131.52. requires, in addition to the construction requirements of Sentences 184.108.40.206.(2), (3), (5) and (6), that foamed plastic insulation be protected on its exterior side by concrete or masonry or a noncombustible material that provides 15 minutes of protection in conformance with Sentence 220.127.116.11.(2).
The appellant contends that Article 18.104.22.168. does not apply to an exposing building face permitted to have 100% unprotected openings. By virtue of the phrase “in addition to” Article 22.214.171.124. is linked to Sentences 126.96.36.199.(2), (3), (5) and (6) which all deal with exposing building faces with less than 100% unprotected openings. None of these Sentences apply to the building in question so neither does Article 188.8.131.52.
Building Official's Position
The building official maintains Article 184.108.40.206. does apply to an exposing building face permitted to have 100% unprotected openings. The phrase “in addition to the requirements of Sentences 220.127.116.11.(2), (3), (5) and (6)” does not imply that one only has to comply with Article 18.104.22.168. if any of the requirements of the preceding Sentences also apply. Filling permitted unprotected openings with fuel in the form of foamed plastic insulation changes the dynamic of the Code methodology and Article 22.214.171.124. accounts for this.
Appeal Board Decision #1683
It is the determination of the Board that even where an exposing building face is permitted to have 100% unprotected openings the provisions of Article 126.96.36.199. still apply.
George Humphrey, Chair