In Ontario building code 2012 part 9, table 9.10.8.1. sets out floor assembly and roof assembly fire resistance rating, while in part 3, from 3.2.2.20. to 3.2.2.83., there are some articles which spell out roof assembly fire resistance rating, but most of these articles do not have a requirement for roof assembly fire resistance rating, is there some where in part 3 which covers all the articles from 3.2.2.20. to 3.2.2.83. for requirement of roof assembly fire resistance rating?