Transcription of USE CATEGORY SYSTEM USER SPECIFICATION FOR …
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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 major Use Categories are further broken down into sub-categories to define the associated degree of biodegradation hazard and product service life expectations for specific products and exposure conditions. In addition to the five Use Categories for biodeterioration, there is a sixth and separate Use Category for fire retardant applications.
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