NOTE: Section 05090 WELDING, STRUCTURAL must be
used for all buildings in Seismic Design Categories
D, E and F and buildings in category C when designed
in accordance with the 1997 AISC Seismic Provisions
for Structural Steel Buildings.
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AWS D1.1/D1.1M[, except use only shielded metal arc welding and low
hydrogen electrodes for ASTM A 514/A 514M steel. Do not stress relieve
ASTM A 514/A 514M steel by heat treatment]. [Grind exposed welds smooth as
indicated.] Provide AWS D1.1/D1.1M qualified welders, welding operators,
and tackers.
The contractor shall develop and submit the Welding Procedure
Specifications (WPS) for all welding, including welding done using
prequalified procedures. Prequalified procedures may be submitted for
information only; however, procedures that are not prequalified shall be
submitted for approval.
3.5.1
Removal of Temporary Welds, Run-Off Plates, and Backing Strips
[Removal is not required] [Remove only from finished areas].
3.6
SHOP PRIMER REPAIR
Repair shop primer in accordance with the paint manufacturer's
recommendation for surfaces damaged by handling, transporting, cutting,
welding, or bolting.
3.6.1
Field Priming
Field priming of steel exposed to the weather, or located in building areas
without HVAC for control of relative humidity. After erection, the field
bolt heads and nuts, field welds, and any abrasions in the shop coat shall
be cleaned and primed with paint of the same quality as that used for the
shop coat.
[3.7
GALVANIZING REPAIR
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NOTE: Most structural steel is painted. If
galvanized items are required, they must be
indicated or specified. The galvanizing specified
is by the hot-dip process. This process requires
large amounts of energy and unevenly heats steel
sections that are either large or thick,
occasionally warping the steel sections. Using zinc
coating by thermal spraying (metallizing) as an
alternative to hot-dip galvanizing should be
considered for certain steel sections. The
following American Welding Society (AWS)
publications should be consulted for further
information:
TS-85 - Thermal Spraying - Practice, Theories, and
Application
C2.2-67 - Recommended Practices for Metallizing with
Aluminum and Zinc for Protection of Iron and Steel.
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SECTION 05120
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