a composite deck assembly. Steel deck for
lightweight concrete roofs is specified in Section
03340 ROOF DECKING, CAST-IN-PLACE LOW DENSITY
CONCRETE. Drawings should show location and extent
of steel deck, complete structural support including
openings greater than 300 mm (12 inches), type and
location of accessories, uniformly distributed live
loads (positive and negative) in kPa (psf),
thickness, and required values for section modulus
and moment of inertia per mm (foot) of width.
Moments of inertia and section modulus values will
be designed based on procedures set forth in SDI Pub
No. 30. Steel decks used as diaphragms must meet
the requirements of TM 5-809-10, Chapter 5.
Subsystems for fire-rated construction, including
roof deck, joists, insulation, built-in roofing, and
ceiling material will be indicated. When the
finished installations will be exposed to high
humidity, seacoast atmosphere or corrosive chemical
fumes special care in specifying the finish should
be used and individual manufacturers should be
consulted for the specific application. Where
sprayed-on fireproofing is used only galvanized
decking with a G90 coating will be allowed. ASTM A
653/A 653M, G90 coating should be specified in
paragraphs Roof Deck, Composite Deck, and Form Deck.
Notes on the drawings should indicate the attachment
method to be used, and should give the size and
spacing for perimeter, side lap, intermediate
supports, and end lap attachments.
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Deck units shall conform to SDI 30. Form [cellular] [and] [non-cellular]
decking and accessories shall conform to ASTM A 653/A 653M, SQ, Grade 230,
Grade 33; ASTM A 1008/A 1008M Coated Carbon Steel Sheets, Grade C, 228 mPa,
33, 000 psi minimum yield strength; or ASTM A 792/A 792M Coated Steel
Sheets, Grade 33. Panels of maximum possible lengths shall be used to
minimize end laps. Deck units shall be fabricated in lengths to span 3 or
more supports with flush, telescoped, or nested 50 mm 2 inchlaps at ends,
and interlocking, or nested side laps, unless otherwise indicated. Deck
with cross-sectional configuration differing from the units indicated may
be used, provided that the properties of the proposed units, determined in
accordance with AISI SG-973, are equal to or greater than the properties of
the units indicated and that the material will fit the space provided
without requiring revisions to adjacent materials or systems. [Factory
apply a standard, phosphatized and painted, baked-on enamel finish to
underside of steel decking.] [[Floor] [and] [Road] deck system design is
based on shared construction.]
2.3.2
Roof Deck
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NOTE: The epoxy coating is expensive and should
only be considered for corrosive environments where
justified by a cost analysis.
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Deck used in conjunction with insulation and built-up roofing shall conform
to ASTM A 792/A 792M or ASTM A 1008/A 1008M. Roof deck units shall be
SECTION 05310
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