ASTM C442
Full Name
ASTM C442 – Standard Specification for Gypsum Backing Board, Gypsum Coreboard, and Gypsum Shaftliner Board
Scope
This specification covers gypsum board designed to be used as a base in multilayer systems, as a gypsum stud or core in semi-solid or solid gypsum board partitions, or in shaftwall assemblies.
Keywords
backing board; coreboard; gypsum; shaftliner; type X