Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (278 KB bytes)

Title: Modelling the charring behaviour of structural lumber

Author: Lau, Peter W.C.; White, Robert; Van Zealand, Ineke;

Date: 1999

Source: Fire and materials. Vol. 23 (1999): Pages 209-216

Publication Series: Miscellaneous Publication

Description: Charring rates for large-section timber based on experimental data have been generally established. The established rates may not be appropriately used for the prediction of failure times of lumber members which are small by comparison. It is questionable whether a constant rate can be safely assumed for lumber members since the rate is likely to increase once the centre-point temperature of the members stats to rise. This paper presents an empirically based model of charring rates for Spruce-Pine-Fir (SPF) Machine-Stress-Rated (MSR) 2 × 4 lumber subject to a constant-temperature exposure of 500°C, on the basis of test results on 55 specimens. In order that the model can be used with reliability analysis, on of the two model parameters was treated as a Logmormal random variable to explain variations observed in the charring rates. Furthermore, the model has been extended to permit evaluations for other lumber sizes and under exposures such as ASTM E119 fire conditions. The model was compared with existing models and used to predict char data found in the literature.

Keywords: Structural lumber, charring rate, fire effects

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

XML: View XML

Citation:


Lau, Peter W.C.; White, Robert; Van Zealand, Ineke 1999. Modelling the charring behaviour of structural lumber. Fire and materials. Vol. 23 (1999): Pages 209-216

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.