1.4.2
Fire Resistance
Complete roof covering assembly shall:
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NOTE: Specify Class B option only when Class A may
not be attainable such as membrane system
application directly to wood deck. Provide
justification/rationale for Class B option with
design submission
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a.
Be Class A [or B] rated in accordance with ASTM E 108 , FM 4470,
or UL 790; and
b.
Be listed as part of Fire-Classified roof deck construction in UL
RMSD, or Class I roof deck construction in FM P7825c.
1.4.3
Wind Uplift Resistance
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NOTE: Determine the required wind uplift resistance
based on ASCE 7 wind loading calculations or
applicable building code requirements. The
specified FM rating incorporates a safety factor of
2 over the maximum calculated uplift pressure.
Therefore, a FM rating of 1-90 correlates to a
maximum uplift calculation of 2.2kPa (45 psf). When
a rated system is specified, ensure the specified
roof system is capable of meeting the wind uplift
resistance specified. Where non-rated systems may
be permissible, include the bracketed option.
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Complete roof covering assembly, including insulation, shall be rated Class
1-[60][90][____] in accordance with FM P7825c capable of withstanding an
uplift pressure of [2.85][4.30][
] kPa per square meter ([60][90][___]
psf). Non-rated systems shall not be installed[, except as approved by the
Contracting Officer. Provide wind load calculations and submit engineering
calculations and substantiating data to validate wind resistance of any
non-rated roof system. Wind uplift calculations shall be based on a design
wind speed of [
] km/h ([
] mph) in accordance with ASCE 7 or
applicable building code requirements].
1.4.4
Preroofing Conference
After approval of submittals and before performing roofing [and insulation]
system installation work, hold a preroofing conference to review the
following:
a. Drawings and specifications and submittals related to the roof
work;
b.
Roof system components installation;
c.
Procedure for the roof manufacturer's technical
representative's onsite inspection and acceptance of the roofing
substrate, the name of the manufacturer's technical
representatives, the frequency of the onsite visits, distribution
SECTION 07511
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