Accession Number : AD0767576

Title :   How Fourteen Coating Systems Affected Smoke Yield from Douglas-Fir Plywood.

Descriptive Note : Forest Service research paper,

Corporate Author : FOREST PRODUCTS LAB MADISON WIS

Personal Author(s) : Brenden,John J.

Report Date : 1973

Pagination or Media Count : 29

Abstract : To measure the effect of coating materials on smoke yield of wood, Douglas-fir plywood of exterior grade A-C quality finished with 14 coating systems was subjected to fire exposure in a chamber similar to that used in a method proposed by the National Bureau of standards. Noncoated specimens and specimens coated with each of the 14 systems were exposed to both flaming conditions at three irradiation energy levels: 2.0, 2.5, and 3.0 watts per square centimeter. The purpose was to determine the smoke yield from uncoated wood under fire exposure and if the amount of smoke given off by wood could be reduced by the coatings. Smoke development was measured as a 'specific optical density' parameter based on light transmission, length of light path, area of specimen, and volume of the chamber. Comparisons were based on a maximum specific optical density parameter and on other parameters developed from specific optical density-time curves.

Descriptors :   (*FIRE RESISTANT COATINGS, *PLYWOOD), (*SMOKE, FIRE RESISTANT COATINGS), LIGHT TRANSMISSION, OPTICAL ANALYSIS

Subject Categories : Coatings, Colorants and Finishes
      Wood, Paper and Related Forestry Products
      Safety Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE