1.1 This specification covers gypsum wallboard which is designed to be used for walls, ceilings, or partitions and affords a surface suitable to receive decoration.

Note 1—Specification C 840 contains application procedures for gypsum wallboard.

1.2 The values are stated in SI (metric) units only and are to be regarded as standard. For gypsum wallboard produced to inch-pound units see Specification C 36/C 36 M.

1.3 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.