A recent incident at the WTP involving placement of structural steel using a luffer crane resulted in damage to the crane boom sheave. The configuration of the work area was such that the crane operator could not see the the tip of the crane boom, therefore the operator was relying on the signalman for crane movement directions. Because the signalman returned to other duties as soon as the crane boom was clear of the immediate work area, he did not see the impending situation. Lesson Learned: When the evolution of a work sequence requires specific communication steps, involved employees must not decide that any of the required steps can be eliminated. Procedures are provided for all work activities for all employees to follow and procedural compliance is expected. Deviation from a procedure can lead to unexpected and unwanted consequences.
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