This specification covers sheet lath, expanded metal lath, diamond mesh, flat and self-furring, and rib metal lath, all with or without backing and designed to be used as a base for gypsum or Portland cement plaster. Metal lath shall be fabricated from cold-rolled carbon steel sheet of commercial quality as specified and galvanized metal lath shall have a G60 coating. Physical properties such as thickness, width, length, and weight shall be specified. Metal lath shall be fabricated from hot-dipped galvanized steel.