SC Structural Framing Practice Questions - South Carolina Structural Framing Contractor Examination Exam

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A hydraulic crane's chart lists 16,000 pounds at a 55-foot radius. The pick is a 12,400-pound girder plus 400 pounds of rigging. Is this a critical lift under the Subpart R definition, and why?

No. 12,800 / 16,000 = 80 percent, and critical lifts begin at 90 percent Yes. 12,800 / 16,000 = 80 percent, which exceeds 75 percent of the crane's rated capacity at that radius No. Only tandem (two-crane) picks are critical lifts Yes, because every steel-erection pick is defined as a critical lift

Correct Answer:

Yes. 12,800 / 16,000 = 80 percent, which exceeds 75 percent of the crane's rated capacity at that radius

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