USE CATEGORY SYSTEM USER SPECIFICATION FOR …

U1-21 AMERICAN WOOD PROTEC TION ASSOCIATION STANDARD. 2021 All Rights Reserved U. USE CATEGORY SYSTEM : user SPECIFICATION FOR TREATED WOOD. Adopted: 1999. U1. Revised: 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021. This Standard was developed by AWPA's Technical Committees in an open, consensus-based process. Any modifications, deviations, or exceptions to this Standard invalidate any references to this Standard and nullifies any statements of compliance with this Standard. IMPORTANT: Various Federal, State, and Local regulations may govern the use of products or processes standardized by AWPA. The existence of an AWPA Standard for a product or process does not imply that it is lawfully permitted for use in all potential applications. AWPA Standards are not to rv PA d be regarded as legal or other professional advice.

Commodity Specification A only) -- Wood and wood-based materials (1) used in contact w ith the ground, fresh water, or other situations favorable to deterioration; (2) used above ground but are difficult to maintain, repair or replace and are critical to …

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