Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Fire Endurance Tests of Unprotected Wood-Floor Constructions for Single-Family Residences. Final Report. Revision of NBS 10 320.

Published

Author(s)

B C. Son

Abstract

Fire endurance tests were performed on two full-scale and twelve small scale wood floor constructions. The fire endurance ratings on unfinished wood joist and plywood subfloor constructions varied from 10 to 13 minutes and were mainly determined by the time to "flame through." In small-scale tests, the addition of carpeting with a hair pad delayed the time of "flame through" approximately 8 minutes. Time to "flame through" may be estimated from the thermal resistance of the construction, and may be modified by the effects of applied load or construction details such as gaps, joints, and penetrations.
Citation
NIST Interagency/Internal Report (NISTIR) -

Keywords

fire endurance, fire tests, flame through, large scale fire tests, Operation Breakthrough, single family dwellings, small scale fire tests, thermal resistance, joists, floors

Citation

Son, B. (1973), Fire Endurance Tests of Unprotected Wood-Floor Constructions for Single-Family Residences. Final Report. Revision of NBS 10 320., NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD (Accessed February 25, 2024)
Created July 1, 1973, Updated February 19, 2017