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.
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.
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
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.