Organization and Use of Standards
AWPA Standards are generally organized by treatment method, type
of finished product, and preservatives.
Use Category System Standards
Use
Category System (UCS) Standards:
U1 and T1 are the new basic 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.
Preservatives Standards
The
Preservative (P) Standards contain specifications for all AWPA
accepted wood preservatives and fire retardants.
Commodities Standards
AWPA Commodity (C) Standards
have been replaced by the Use Category System Standards U1 and T1.
Final revisions to the C Standards occurred in early 2003. No
further technical changes have been made to these Standards. The
final versions of the C Standards were printed in the 2004 edition
of the Book of Standards, and have not been printed since then.
Nonpressure Standards
Nonpressure
(N) Standards address the application of preservatives by brush,
spray, dip, soak or other nonpressure methods.
Analysis Method Standards
The
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.
Miscellaneous Standards
These "M"
Standards include general guidelines and procedures, as
well as other supplementary information.
Evaluation Standards
The
Evaluation (E) Standards describe standardized laboratory and field test methods
for the
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
of Standards.
Conversion Factors and
Correction Tables
These
factors and tables are primarily for the producers' use during
everyday plant operations. |
