fittings, stainless steel or aluminum, or mating surfaces of structural
bolted connections.
2.6
CRANE IDENTIFICATION PLATES
Provide identification plate on the crane and hoist. The identification
plates shall be of noncorrosive metal with clearly legible permanent
lettering giving the manufacturer's name, model number, capacity in both
kilogram and pound units printed in different colors, and other essential
information or identification.
2.7
MARKINGS ON CRANE
Markings shall include: bridge motion direction arrows on both sides of the
bridge; and trolley motion direction arrows on both sides of trolley.
Markings shall be visible from push button station and from the loading
point and shall correspond to the push button labeling on the pendant
pushbutton station. Mark the hook rated capacity on both sides of the
hoist or hoist load block.
2.8
PATENTED TRACK
Provide specially designed beam, i.e., patented track beam, constructed
from welded steel components. Provide patented track fabricated by a
manufacturer regularly engaged in the production of this type of beam. The
lower flange (T-rail) of the beam section shall have a flat wheel tread
surface. Minimum lower flange width shall be 81 mm 3.25 inches and shall
have a chemical composition of 0.45 to 0.60 percent carbon content, 0.60 to
1.1 percent manganese content. The lower flange wheel tread surface shall
be hardened to a minimum hardness of 225 BHN.
The upper flange and web of the beam section shall be structural steel,
provided as one monolithic piece rolled to shape or fabricated from two
pieces with the flange and web continuously fillet welded on both sides.
The joint between the web and the T-rail shall be continuously welded from
both sides.
Size beam, as a minimum, to withstand all expected forces and
the load combinations specified herein.
2.9
CRANE RUNWAY TRACK SYSTEM
Provide patented track runway track beams designed and constructed in
compliance with MMA MH27.1, Class C (Moderate Service), except as modified
and supplemented in the section.
It shall be the Contractor's responsibility to provide the complete runway
track suspension system that is required to hang the crane runway track at
its indicated location from the structural supports indicated on the
drawings. For the track suspension system, provide all the standard
commercial cataloged products possible. Custom runway track suspension
devices that are not standard commercial cataloged products, designed and
constructed for this particular application, are acceptable if their design
documentation is approved by the Contracting Officer.
Provide flexible suspension type runway system including runway track
beams, hanger rods, suspension fittings, lateral and longitudinal sway
bracing, and necessary hardware.
Select runway suspension hanger rods fabricated from alloy steel with
rolled threads. Provide threads of sufficient length to permit at least
SECTION 14637N
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