1.1 This specification covers asbestos-cement siding, including accessories, designed to provide the weather-exposed sidewall surfaces of buildings. Siding in the following forms is covered:

1.1.1 Siding Shingles—Uniform thickness, generally rectangular in shape and having wavy, random, thatched, straight, or irregular butts.

1.1.2 Clapboards—Uniform thickness, generally longer and narrower in shape than siding shingles, and usually with the exposed edge straight.

1.1.3 Sheets—Uniform thickness, rectangular in shape, larger in unit sizes than shingles or clapboards.

Note 1—For additional information, see Specification C 725 for Semidense Mineral Fiber Siding.

1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.