Operators of most cranes above 2,000 lb. capacity when used in construction will need to be either certified by an accredited crane operator testing organization, such as the National Commission for the Certification of Crane Operators (NCCCO), or qualified through an audited employer program [§ 1926.1427(a)].
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2. Leverage Cranes use the principle of leverage to lift loads. Rotation of the upperworks (cab, boom, counterweight, load) changes the location of the crane's center of gravity, its' leverage point or fulcrum. As the upperworks rotates, the leverage of a mobile crane fluctuates.
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monitor nominal and peak stresses in the various critical crane components. API references a test procedure that can be used to measure acceptability of the component stresses in the crane. The 200% overload is an option for some cranes where this high load would not cause damage to the crane. one must make
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