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 P7825.
FM or UL approved components of the roof covering assembly shall bear the
appropriate FM or UL label.
1.4.4
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 2.2 kPa (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 P7825 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 7or applicable building code requirements].
1.4.5
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 of copies of the
inspection reports from the manufacturer's technical
representatives to roof manufacturer;
SECTION 07550
Page 12
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