The building official reviewing my permit application/plans has held up my permit and stated "Draft stopping required section 302.12 of the 2009 IRC please show how this will be completed...Draft stopping includes attic and floor truss areas. "
After reading 302.12 I agreed the floor trusses should be draft stopped. However, I do not agree that the attic is required to be draft stopped. Now, I am not saying it isn't a prudent thing to do. I may want to draft stop the attic anyway, but does the code really require it in this case.
I am building a single story ranch home with a walkout basement. 16" floor trusses are used between the basement and main floor. I plan to drywall the basement ceiling. Roof trusses are used above the main area. 302.12 reads ...In combustible construction where there is usable space both above and below the concealed space of a floor/ceiling assembly...". There is no usable space above the roof trusses so I do not think 302.12 applies to the roof trusses.
I am building in central PA, Bethel Township. He is quoting only the IRC, no local codes.
I was not sure if I should post this here or in the residential fire code forum. Sorry if I guessed wrong.