BCAB #1682 - Combustible Components in Noncombustible Construction, Articles 220.127.116.11. and 18.104.22.168.
December 16, 2010
Re: Combustible Components in Noncombustible Construction, Articles 22.214.171.124. and 126.96.36.199.
The project is a sprinklered office building containing business and personal service occupancies as well as medium hazard industrial occupancies. The building is required to be noncombustible.
Reason for Appeal
Article 188.8.131.52. provides for the limited use of combustible components in a non-loadbearing exterior wall assembly in a building required to be of noncombustible construction. Article 184.108.40.206. provides conditions for the use of combustible insulation in a building required to be of noncombustible construction.
The appellant contends that combustible insulation is permitted by 220.127.116.11. and therefore the requirements of 18.104.22.168. are not applicable. The requirements of 22.214.171.124. are intended to apply only to combustible elements not specifically listed in 3.1.5. The scope of 126.96.36.199. is limited to combustible cladding as indicated by title of the supporting appendix note.
Building Official's Position
The building official maintains that the requirements of 188.8.131.52. and 184.108.40.206. are separate and that the requirements of both articles must be met in the use of combustible insulation in an exterior wall assembly.
Appeal Board Decision #1682
It is the determination of the Board that both Articles 220.127.116.11. and 18.104.22.168. apply to combustible insulation in non-loadbearing exterior wall assemblies and the insulation must conform to the provisions of both Articles.
George Humphrey, Chair