Crane - TM-5-5420-279-230057

TM 5-5420-279-23

1-12-1 Crane

The crane stabilizer legs provide a stable platform for crane operations during bridge construction

and also assist in maintaining a level platform for bridge construction.

1-12-2 Slide Frame

A relax mechanism connects the slide frame to the launcher vehicle to allow for torsional

movement between the vehicle chassis and the launching platform during bridge construction.

The slide frame also provides the framework of the launch platform.

1-12-3 A-Frame

The A-Frame provides the pivot point for the launch beam. It houses the launch frame, stabilizer

legs and two emergency stop mechanisms. One electrical and one mechanical.

1-12-4 Launch Frame

Launch beam construction is carried out at the rear end of the launch frame. The drive motor,

upper winch and lower winch are mounted on the launch frame.

1-12-5 Drive Motor

The drive motor propels the launch beam forward under control.

1-12-6 Winches

Upper and lower winches mounted to the launch frame control the forward and rear carriages.

The carriages are used to suspend the constructed bridge from the launch beam and allow the

bridge to be pulled through the A-Frame.

1-12-7 Forward Launch Beam

The forward launch beam is housed in the launch frame until the launch beam is constructed and

deployed. The far bank support is attached permanently to the forward launch beam by a pivot

pin.

1-12-8 Far Bank Support

Stability of the launch beam when deployed is maintained by the far bank support. The far bank

support is self-leveling.

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