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BRIDGE
GIRDERS |
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Double Girder
Crane |
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Two bridge girders consisting of welded,
or machine bolted structures. The girder towards the long travel machinery is known as drive side girder and the second girder as idle side girder. |
| Single Girder
Crane |
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Only one girder consisting of a welded,
or machine bolted structure. In this case the hoist machinery is suspended and runs on the bottom of the girder. |
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CARRIAGES |
These house the long travel wheels, driving as well as idle, and the girders are supported on them.
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ELEVATION |
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PLAN |
The figures
indicate the general layout of the crane, however the actual
layout is as per the assembly drawings.
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CRAB |
This consists of the hoist and the cross traverse machineries. (Aux. hoist
if required)
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Hoist Machinery consists of the following
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1) Motor |
4) Rope Drum |
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2) Brake |
5)
Wire Rope |
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3) Gear Box |
6)
Snatch Blocks |
Cross traverse machinery consists of the following
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7) Motor |
9) Gear Box |
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8) Brake |
10) Wheels |
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PLATFORM |
This is a walkway along the length of the crane for maintenance purpose. It also provides support for the long travel machinery.
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LONG TRAVEL
MACHINERY |
This machinery moves the crane along the length of the building and consists of the following
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11)
One motor at the centre of span or two motors connected directly to two wheels. |
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12)
Brake |
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13)
Gear Box |
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14)
Wheels |
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15)
Shaft along the full length. |
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CABIN |
The cabin, if provided is suspended from one end, so positioned to give the operator an
unobstructed view of the load to be handled. All the controls are housed inside the cabin.
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