Provide lift limiting and overload limiting devices, clutch-to-stop devices
shall not be furnished with the hoist.
2.4.9
Electrification
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NOTE: Select runway electrification installation to
suit other contract requirements. Select Type 1
enclosures for an indoor crane; select Type 3
enclosures for an outdoor crane.
**************************************************************************
Runway electrification includes providing conductors between the
electrification system and the junction box indicated on the drawings.
Provide NEMA Type [1][3], as defined by NEMA 250, enclosures for control
panels, for pendent pushbutton station, and for auxiliary devices and mount
along the bridge. For runway electrification provide copper conductors
enclosed in a solid plastic cover. Provide two sets of current collectors
for each conductor.
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NOTE: Festooned type electrification is preferred
along runway for short bridge crane runway lengths
or along the crane bridge when there are hoist
trolley runs along a short crane bridge. Enclosed
safety bar electrification are recommended where
crane runway lengths are longer or hoist trolley
runs along a long crane bridge.
If festooned electricification is used on crane
runways, allow space for a parking area of the
festoon trolley.
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Runway electrification shall be of the [flat festooned type] [enclosed
safety bar type with four [continuous] copper conductors]. Provide
electrical work for the crane system in accordance with NFPA 70.
2.5
CRANE PAINTING
Blast clean all portions of the crane to be painted to the requirements of
SSPC SP 6. As soon as practical after blasting, but before any evidence of
rust, coat all surfaces with a yellow zinc phosphate primer, applied to a
minimum dry film thickness of 0.05 mm 2.0 mils but not exceeding 0.1 mm 4.0
mils. Apply finish coat of high gloss silicone alkyd copolymer enamel,
applied to a minimum dry film thickness of 0.04 mm 1.5 mils but not
exceeding 0.08 mm 3.0 mils.
Coat faying surfaces of bolted connections with a yellow zinc phosphate
primer, but do not apply finish paint. The color of the finish coat shall
be brilliant yellow. The load block shall be brilliant yellow with black
diagonal striping, 25 mm one inch wide diagonal black stripes located on 50
mm 2 inch centers. Factory paint electrical and mechanical equipment in
accordance with the manufacturer's best standard practice (for the
specified environment), except that electrical equipment doors, which
expose current-carrying electrical conductors when opened, shall be orange.
Do not paint over the hook, equipment information plates, including
nameplates, or identification plates. Do not paint over lubrication
SECTION 14637N
Page 18
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