f. Recovery by Other Than a Launcher - CONT
(c) Distribute the load to protect the cable (1) and the diaphragm (2).
Be sure lifting device exceeds the lifting requirements of the task. Refer to operational data
plate of the lifting device for lifting limitations and angles. Do not exceed these specifi-
cations. It will be necessary for the lifting device to increase the boom angle during the
recovery operation. This will reduce the lifting capacity of the lifting device. Check the
lifting device performance chart to ensure the lifting device remains within its area of
operation at all times.
(d) Position the lifting device on the far-shore for recovery procedures as shown.
(e) Attach lifting sling (3) to the diaphragm (2) of bridge (4). Place protective timbers, or
wood blocks (5) between the cables and the diaphragm. Avoid metal to metal contact, if
at all possible. Inspect all lifting components for damage, evidence of stress and strain,
and breaks that would reduce their lifting strength
If a master link is used, it must be rated at a capacity greater than the weight of the bridge
PLUS allowances must be made for the increased forces present during the recovery.
(f) Position the lifting device facing, centered with the boom pointed directly toward the
bridge and pointing down the recovery path.
Stop operations any time is appears something is going wrong. Abandon any vehicle or
equipment that shows indications of turning over or slipping down a bank. Return to that
equipment and task only after the situation has been stabilized.
Consult the operational data plate and lifting capacity schedules displayed on the lifting
device or in its operation manuals. Ensure the boom angle and the cable arrangement
(single, double, or triple strand) is accurately figured into the lifting capacity of the lifting
device. The boom height when combined with the extended lifting device cables must be
able to offer lift to the end of the bridge no less than half the distance across the ravine,
The force of towing vehicle will be felt as additional weight on the boom of the lifting
device. No one piece of equipment must overpower the other. All equipment must work
together for the successful completion of this task.
(g) Take up the slack in the cable on the near bank with the towing vehicle (6). Take up the
slack on the lifting device cable (1).