bracketed phrases and include the last bracketed
phrase.
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Immediately after placement and alignment, and after correcting
inaccuracies, permanently fasten steel deck units to structural supports
and to adjacent deck units by welding with normal 16mm 5/8 inch diameter
puddle welds [or fastened with screws, powder-actuated fasteners, or
pneumatically driven fasteners] as indicated on the design drawings and in
accordance with manufacturer's recommended procedure[ and SDI 30]. Clamp
or weight deck units to provide firm contact between deck units and
structural supports while performing welding [or fastening]. [Anchoring
the deck to structural supports with powder-actuated fasteners or
pneumatically driven fasteners is prohibited.] Attachment of adjacent deck
units by button-punching is prohibited.
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The fasteners shall provide minimum required
pull-out, pull-over and shear resistance based upon
test results of the specific steel deck and fastener
as listed in the current edition of the Factory
Mutual Approval Guide and Factory Mutual Data Sheet
1-28 or manufacturer's data sheets. If studs are
being welded to the top flanges of beams, the deck
ends should be butted. If not, deck ends should be
lapped. Welding washers shall be used at welded
connections when deck thickness is less than 0.711
mm (0.028 inch). Fasteners for roof insulations are
specified in Section 07220, ROOF INSULATION.
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3.2.1.1
Welding
**************************************************************************
NOTE: Show location, size, and spacing of
attachments on the drawings for composite and
diaphragm-acting decks. If they are not shown,
delete the first phrase and include the second.
Coordinate finish repair with finish requirements.
**************************************************************************
Perform welding in accordance with AWS D1.3 using methods and electrodes
recommended by the manufacturers of the base metal alloys being used.
Ensure only operators previously qualified by tests prescribed in AWS
D1.1/D1.1M and AWS D1.3 make welds. Immediately recertify, or replace with
qualified welders, welders that have passed qualification tests but are
producing unsatisfactory welding. Location, size, and spacing of fastening
shall [be as indicated] [conform to the recommendations of the Steel Deck
Institute and the steel deck manufacturer]. Welding washers [shall] [shall
not] be used at the connections of the deck to supports. Welding washers
shall not be used at sidelaps. Holes and similar defects will not be
acceptable. Deck ends shall be [lapped 50 mm 2 inches] [butted]. All
partial or segments of deck units shall be attached to structural supports
in accordance with Section 2.5 of SDI DDM02. [Shear connectors shall be
attached as shown and shall be welded as per AWS D1.1/D1.1M [through the
steel deck to the steel member] [directly to the steel member]].
Immediately clean welds by chipping and wire brushing. Heavily coat welds,
cut edges and damaged portions of [coated finish with zinc-dust paint
conforming to ASTM A 780] [shop [primed] [painted] finish with the
SECTION 05310
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