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Two days of heavy rain have left the planned crane set-up area soft, rutted, and holding standing water. Before the crane may be assembled or used at that location, what condition must exist?
A
Soft ground is acceptable as long as the outriggers are fully extended and the floats are attached
B
The operator may work off the wet ground provided every lift is held under half of the charted capacity
C
The ground must be firm, drained and graded to a degree that, together with supporting materials such as mats or cribbing, the manufacturer's requirements for support and levelness are met
D
Standing water matters only for crawler cranes, since wheeled cranes bear on outrigger floats