RISK ASSESSMENT
QPP147 Section 2 Rev. March 07
F. HAZARDS WHEN SLEWING
RISK CONTROLS & GENERAL PRECAUTIONS
F1. Collision with people or objects
when slewing.
F1. Check that the slewing arc is free of obstructions before slewing.
F2. Damage to the boom and tip over
of the crane from centrifugal forces
caused by rapid slewing and
stopping with a suspended load.
F2. Always be aware of the centrifugal forces when slewing. Slewing at a high speed with a suspended
load increases the working radius and could cause an overload that could tip over the crane. If slewing
is stopped abruptly, the inertia on the suspended load will cause it to swing uncontrollably and impose
higher loads on the boom. Do not slew rapidly or stop abruptly as this could lead to tip over and/or
damage to the boom. This problem will get worse with longer boom lengths.
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