Regulations, Standards, and Operator Responsibilities
The regulatory frame
Construction crane work falls under OSHA 29 CFR 1926 Subpart CC (1926.1400–1442); general industry uses 1910.180. ASME B30.5 covers mobile and locomotive cranes, B30.9 slings, B30.10 hooks, B30.20 below-the-hook devices, and B30.23 personnel lifting. The manufacturer's manual and load chart are part of the operating requirements. Operators must be trained and evaluated, signal persons qualified, and riggers qualified under 1926.1427–1429. A competent person can identify hazards and authorize corrective action; a qualified person has the recognized knowledge to design or evaluate.
Operator duties
Verify the load weight, select the right chart, know the rigging, inspect the crane, obey signals, stop when conditions change, and refuse an unsafe lift. The operator must not disable safety devices or operate a crane with a known safety defect. Records of inspections, repairs, and certifications must be available.
Worked example
A load is marked 18,000 lb. At the planned radius the gross chart capacity is 19,000 lb, but the block and slings weigh 1,200 lb. Usable capacity is 17,800 lb, so the lift is over by 200 lb. The operator stops and asks for a shorter radius or a larger crane. The fact that the chart number exceeds the marked load is not enough.
Traps
Treating certification as a license; assuming the rigger owns the capacity decision; mixing general-industry and construction rules; ignoring state or local requirements; and failing to document are frequent failures. 'Should' and 'shall' are not interchangeable.