Abbr. for American Society of Civil Engineers

Abbr. for asphalt surface course

A fire-resisting roofing shingle, composed largely of asbestos.

A fireproof insulating material generally composed of asbestos with bentonite as the binder.

Asbestos-cement board and component wall systems, directly supported by wall framing, forming a wall or wall facing.

A dense, rigid, board containing a high proportion of asbestos fibers bonded with portland cement; resistant to fire, flame, and