AWPA | AWPA - American Wood Protection Association

The American Wood Protection Association (formerly the American Wood Preservers' Association) is a professional society which develops standards for treated wood products, wood preservatives, and other technologies which make wood last longer in the environment.

AWPA Standards,Use Category System,Book of Standards,wood treatment,wood preservative,U1,M4,treated lumber,UC2,UC4C,UC4A,UC3B,UC4B,ground contact,ANSI