Organization and Use of Standards
AWPA Standards are generally organized by treatment method, type
of finished product, and preservatives.
Use Category System Standards
Category System (UCS) Standards:
U1 and T1 are the primary Standards for specifying
treated wood products. The UCS was developed as a format revision
of the Commodity (C) Standards and was not intended to make
substantive technical changes to those Standards. The UCS contains
definitions of the various Use Categories, a Service Conditions
section, a Treated Wood Use Selection Guide, a list of AWPA accepted
preservative systems, a Guide to Use Categories and various
Commodity Specifications relating to specific product types such as
sawn products, utility poles, piling or fire retardant applications.
Preservative/Protectant (P) Standards contain specifications for all AWPA
accepted wood preservatives and fire retardants.
Hydrocarbon Solvent Standards
Standards for Hydrocarbon Solvents (HS) contain the
specifications for preservative/protectant carriers for oilborne
or solvent borne systems.
Analysis Method Standards
Analytical (A) Standards specify the acceptable procedures for
testing preservatives and wood treated with preservatives. These
tests encompass physical properties, chemical composition, purity of
preservatives, and the results of treatment; i.e., preservative
retention and penetration in the treated product.
Standards include general guidelines and procedures, as
well as other supplementary information.
Evaluation (E) Standards describe standardized laboratory and field test methods
evaluation of preservative treatments and treated wood. These
methods can be used to develop data packages in support of the
acceptance of a preservative or treated commodity into the AWPA Book