NFPA 253: Standard Method of Test for Critical Radiant Flux of Floor Covering Systems Using a Radiant Heat Energy Source
Current Edition: 2015 Next Edition: 2019

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What is NFPA 253?
NFPA 253: Document Scope

1.1 Scope. 1.1.1 This fire test response standard describes a procedure for measuring critical radiant flux behavior of horizontally mounted floor covering systems exposed to a flaming ignition source in a graded, radiant heat energy environment within a test chamber. 1.1.2* This fire test response standard measures the critical radiant flux at flameout and provides a basis for estimating one aspect of fire exposure behavior for floor covering systems. A.1.1.2 The imposed radiant flux simulates the thermal radiation levels likely to impinge on the floors of a building whose upper surfaces are heated by flames, hot gases, or both from a fully developed fire in an adjacent room or compartment.

This standard presents a method for evaluating critical radiant flux of floor coverings in corridors or exitways, thus providing a basis for estimating one aspect of the fire exposure behavior of floor covering systems.

Official document scope
What does NFPA 253 address?

This fire test response standard describes a procedure for measuring the critical radiant flux of horizontally mounted floor covering systems exposed to a flaming ignition source in a graded, radiant heat energy environment within a test chamber. Annexes discuss how to calibrate an apparatus, mounting methods, sample data logs, application and interpretation of results, safety precautions, and more.



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