Use Category System Set: Processing and Treatment Standard (T1-11) and User Specification for Treated Wood (U1-11)
standard by American Wood Protection Association, 01/01/2011
Use Category System Set: Processing and Treatment Standard (T1-12) and User Specification for Treated Wood (U1-12)
standard by American Wood Protection Association, 05/01/2012
2020 AWPA Book of Standards
standard by American Wood Protection Association, 2020
Use Category System Set: Processing and Treatment Standard (T1-15) and User Specification for Treated Wood (U1-15)
standard by American Wood Protection Association, 2015
Use Category System Set: Processing and Treatment Standard (T1-09) and User Specification for Treated Wood (U1-09)
standard by American Wood Protection Association, 04/01/2009