UNLIMITED FREE ACCESS TO THE WORLD'S BEST IDEAS

close
Already an Engineering360 user? Log in.

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

Customize Your Engineering360 Experience

close
Privacy Policy

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

AWPA - U1

USE CATEGORY SYSTEM: USER SPECIFICATION FOR TREATED WOOD

inactive
Organization: AWPA
Publication Date: 1 January 2015
Status: inactive
Page Count: 66
scope:

INTRODUCTION TO THE USE CATEGORY SYSTEM

The Use Category System (UCS) of the American Wood Protection Association (AWPA) designates what preservative systems and retentions have been determined to be effective in protecting wood products under specified exposure conditions. The strength of the UCS and its focus is that all wood uses can be placed into one of five major Use Categories that clearly describe the exposure conditions that specific wood products can be subjected to in service. The major Use Categories are further broken down into subcategories 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. The Use Category designations are described in detail in Section 2 below. The Use Category system is designed to help specifiers and product users locate the appropriate AWPA Standards that provide listing of preservatives deemed acceptable for specific products and end-use environments. The user of the AWPA Standard U1 should first become familiar with the major differences between the Use Categories and the expected service conditions as described in Section 2. This information is then used in conjunction with Section 3: Guide to Treated Wood End Uses to determine the specific Commodity Specification of the Standard that lists the appropriate preservative requirements for that use. When purchasing under the Use Category System, material orders should include the specific commodity, Use Category designation, Standard U1 Commodity Specification, wood species, preservative and any special requirements such as preor post-treatment preparations (including conditioning and drying). Wherever practicable, material should be manufactured in its final form prior to treatment to eliminate the necessity for subsequent cutting or boring of the treated wood. Risk assessment documents and models (e.g., Best Management Practices) have been developed by the Western Wood Preservers Institute (www.wwpinstitute.org) for the use of CCA, ACZA, Creosote, Pentachlorophenol and ACQ treated wood in aquatic environments. Projects calling for large volumes of treated wood immersed in (i.e., below the splash zone) poorly circulating bodies of water should be evaluated on an individual basis using risk assessment procedures. There are a number of other AWPA Standards that complement Standard U1 for wood treated with preservative systems. These include:

Document History

January 1, 2020
USE CATEGORY SYSTEM: USER SPECIFICATION FOR TREATED WOOD
A description is not available for this item.
U1
January 1, 2019
USE CATEGORY SYSTEM: USER SPECIFICATION FOR TREATED WOOD
A description is not available for this item.
U1
January 1, 2018
USE CATEGORY SYSTEM: USER SPECIFICATION FOR TREATED WOOD
A description is not available for this item.
U1
January 1, 2017
USE CATEGORY SYSTEM: USER SPECIFICATION FOR TREATED WOOD
A description is not available for this item.
U1
January 1, 2016
USE CATEGORY SYSTEM: USER SPECIFICATION FOR TREATED WOOD
A description is not available for this item.
U1
January 1, 2015
USE CATEGORY SYSTEM: USER SPECIFICATION FOR TREATED WOOD
INTRODUCTION TO THE USE CATEGORY SYSTEM The Use Category System (UCS) of the American Wood Protection Association (AWPA) designates what preservative systems and retentions have been determined to...
U1
January 1, 2014
USE CATEGORY SYSTEM: USER SPECIFICATION FOR TREATED WOOD
A description is not available for this item.
U1
January 1, 2013
USE CATEGORY SYSTEM: USER SPECIFICATION FOR TREATED WOOD
INTRDUCTION The Use Category System (UCS) of the American Wood Protection Association (AWPA) designates what preservative systems and retentions have been determined to be effective in protecting...
U1
January 1, 2012
USE CATEGORY SYSTEM: USER SPECIFICATION FOR TREATED WOOD
INTRODUCTION TO THE USE CATEGORY SYSTEM The Use Category System (UCS) of the American Wood Protection Association (AWPA) designates what preservative systems and retentions have been determined to...
U1
January 1, 2011
USE CATEGORY SYSTEM: USER SPECIFICATION FOR TREATED WOOD
INTRODUCTION TO THE USE CATEGORY SYSTEM The Use Category System (UCS) of the American Wood Protection Association (AWPA) designates what preservative systems and retentions have been determined to...
U1
January 1, 2010
USE CATEGORY SYSTEM: USER SPECIFICATION FOR TREATED WOOD
INTRODUCTION TO THE USE CATEGORY SYSTEM The Use Category System (UCS) of the American Wood Protection Association (AWPA) designates what preservative systems and retentions have been determined to...

References

Advertisement