(1) Unless otherwise indicated, preservatives and retentions listed in Tables
4-10 are based upon the American Wood Protection Association (AWPA) Book
of Standards, 2007 Edition.
(2) The AWPA Book of Standards also lists
Ammoniacal Copper Quat-B (ACQ-B) and Ammoniacal Copper Zinc Arsenate
(ACZA) as approved waterborne treatments for Southern Pine; however, these
formulations are used almost exclusively on difficult-to-treat Western species.
(3) SBX may be used above ground where continuously protected from exposure
to liquid water in applications such as sill plates or other enclosed structural
framing at retentions (B2O3 basis) of 0.17 pcf, or 0.28 pcf where
Formosan termites are confirmed.
(4) CA-B retention of 0.08 is code
approved for residential decking and related specialties per ICC-ES Evaluation
Service Report, ESR 1721. ACQ retention of 0.15 is code approved by the
International Code Council Evaluation Service (ICC-ES) for residential decking
and related specialties per ICC-ES National Evaluation Reports, NER 628 and
643.
(5) ACQ-D not recommended.
(6) ACQ-B and Micronized Copper only.
(7) ACQ-C only.
(8) ACC and CCA are not approved for most residential and
consumer-use applications.
(9) Creosote not recommended for this application
where a clean appearance and an odor-free environment is important.
(10) CR and CR-S only.
(11) CR only.
(12) Salt Water Splash is the exposure
of any member of a marine structure which is positioned above mean high
tide, but is subject to frequent wetting from wave action or wind which supports
intermittent degradation by marine organisms.
(13) For above ground
use only, such as supports resting on footings above grade.
(14) Composites
listed in this category (Commodity Specification F) include all plywood except
that treated for Marine (Salt Water) Applications, Commodity Specification G),
and plywood treated for Permanent Wood Foundation (Commodity Specification
A).
(15) Retentions apply to PWF-marked lumber and plywood.
(16) PTI
is code approved per International Code Council Evaluation Service (ICC-ES)
ESR 1477.
(17) Micronized Copper is code approved per International Code
Council Evaluation Service Report (ICC-ES) NER 628.
(18) Glulam included in
marine commodity specification per AITC 109-2007, American Institute of
Timber Construction, Standard for Preservative Treatment of Structural Glued
Laminated Timber.
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