[2.5
GALVANIZING
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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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ASTM A 123/A 123M or ASTM A 153/A 153M, as applicable, unless specified
otherwise galvanize after fabrication where practicable.
][2.6
OVERHEAD, TOP RUNNING CRANE RAIL
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NOTE: Crane rail shape and size shall be based on
the crane capacity and maximum wheel loads. Consult
the crane manufacturer for their recommended rail.
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[AISC 316 and AISC 317] [AISC 325] [AREMA Manual], [_____] kg pound crane
rail section and [bolted] [welded] joints. Provide rail fasteners and a
minimum rail length of 3000 mm 10 feet.
]2.7
FABRICATION
2.7.1
Markings
Prior to erection, members shall be identified by a painted erection mark.
Connecting parts assembled in the shop for reaming holes in field
connections shall be match marked with scratch and notch marks. Do not
locate erection markings on areas to be welded [or on surfaces of
weathering steels that will be exposed in the completed structure]. Do not
locate match markings in areas that will decrease member strength or cause
stress concentrations. [Affix embossed tags to hot-dipped galvanized
members.]
2.7.2
Shop Primer
Shop prime structural steel, except as modified herein, in accordance with
SSPC PA 1. Do not prime steel surfaces embedded in concrete, galvanized
surfaces, [surfaces to receive sprayed-on fireproofing,] [surfaces to
receive epoxy coatings,] [surfaces designed as part of a composite steel
concrete section,] or surfaces within 13 mm 0.5 inch of the toe of the
SECTION 05120
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