This fire-test-response standard describes a procedure for
measuring the critical radiant flux of exposed attic floor
insulation subjected to a flaming ignition source in a graded
radiant heat energy environment in a test chamber. The specimen is
any attic floor insulation. This test method is not applicable to
those insulations that melt or shrink away when exposed to the
radiant heat energy environment or the pilot burner.
This fire-test-response standard measures the critical radiant
flux at the point at which the flame advances the farthest. It
provides a basis for estimating one aspect of fire exposure
behavior for exposed attic floor insulation. The imposed radiant
flux simulates the thermal radiation levels likely to impinge on
the floors of attics whose upper surfaces are heated by the sun
through the roof or by flames from an incidental fire in the attic.
This fire-test-response standard was developed to simulate an
important fire exposure component of fires that develop in attics,
but is not intended for use in estimating flame spread behavior of
insulation installed other than on the attic floor.
The values stated in SI units are to be regarded as standard.
The values given in parentheses are for information only.
The text of this standard references notes and footnotes that
provide explanatory information. These notes and footnotes,
excluding those in tables and figures, shall not be considered as
requirements of this standard.
This standard is used to measure and describe the response
of materials, products, or assemblies to heat and flame under
controlled conditions, but does not by itself incorporate all
factors required for fire hazard or fire risk assessment of the
materials, products, or assemblies under actual fire
This standard does not purport to address all of the safety
concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use.
The text of this standard references notes and footnotes which
provide explanatory material. These notes and footnotes (excluding
those in tables and figures) shall not be considered as
requirements of the standard.