BCAB #1704 - Minor Combustible Components, Article 188.8.131.52.
December 15, 2011
Re: Minor Combustible Components, Article 184.108.40.206.
The project is an unsprinklered highrise building of residential occupancy. The building and the exterior wall assembly are of noncombustible construction.
Reason for Appeal
Within the exterior noncombustible wall assembly, it is proposed to use combustible fiberglass spacers.
The appellant contends that the fiberglass spacers can be considered similar minor combustible components per clause 220.127.116.11.(1)(h) as the combustibility and exposure would be similar or less than is permitted by Article 18.104.22.168. for wood blocking or foamed plastic air sealants. Further, Article 22.214.171.124. is not applicable because the cladding is noncombustible.
Building Official's Position
The building official maintains that the thermal spacers are not minor combustible components per Article 126.96.36.199. as they support a significant envelope component.
Further, sentence 188.8.131.52 requires non-loadbearing exterior wall assemblies incorporating combustible components to be tested to CAN/CSA S134. The thermal spacer is a combustible component in such a wall assembly. No such test has been provided.
Appeal Board Decision #1704
It is the determination of the Board that the fiberglass spacers are similar minor components per clause 184.108.40.206.(1)(h). Further, the Board determines that it is the intent of the code that the requirements of Article 220.127.116.11. do not apply to similar minor components permitted by Article 18.104.22.168.
George Humphrey, Chair