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American Wood Council

Update on flame spread performance of wood products used for interior finish

Oct 13, 2015

dca1LEESBURG, VA. – The American Wood Council (AWC) has released a revised Design for Code Acceptance 1 (DCA 1): Flame Spread Performance of Wood Products Used for Interior Finish.

Most code requirements for wood interior finish materials are expressed in terms of flame spread index numbers. Revisions to DCA 1 incorporate new testing in accordance with ASTM E84 – Standard Test Method for Surface Burning Characteristics of Building Materials. Flame spread values reported within DCA 1 have been updated based on testing and analysis performed in accordance with the current version of ASTM E84 – replacing many of the flame spread classification values derived from tests conducted in the 1970s. For some species, the flame spread index values derived in accordance with the current test standard result in a change in classification from Class C to Class B.

“Wood and wood-based products are widely used as interior wall, ceiling and floor surfaces in all types of buildings.” said AWC Vice President of Engineering Brad Douglas. “Recent test results, as provided in the revised DCA 1, offer designers the latest code-compliant information when specifying wood finishes.”

The free report can be downloaded at: http://www.awc.org/codes-standards/publications


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