NFPA 253-2019 PDF Download

NFPA 253 is a standard method of testing the critical radiant flux of floor covering systems using a radiant heat energy source. This standard provides a critical basis for estimating one aspect of the fire exposure behavior of a floor covering system installed in a building corridor or exitway. The test procedure outlined in NFPA 253 is used to determine the critical radiant flux of floor covering materials, which is a measure of their fire resistance.

The 2019 edition of NFPA 253 has been updated and revised to address the use of modern materials, specifically simulated concrete flooring. This edition includes annexes that provide guidance on calibrating the testing apparatus, mounting methods, sample data logs, and the proper application and interpretation of test results. It also includes specific safety precautions to be followed during testing.

NFPA 253 is referenced by other standards, such as NFPA 101 (Life Safety Code) and building codes, making it an important tool for architects, engineers, and other professionals involved in the selection and installation of floor coverings. It helps ensure that materials used in buildings meet the necessary fire safety requirements.