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Crane lift calculator.
Total lifted load including hook block and rigging, and percentage of the crane's chart capacity at radius.
How it's calculated.
The crane lifts more than the load. The total lifted load includes everything below the boom tip:
Total = load × (1 + contingency) + hook block + rigging + lifting beam
Utilisation = total ÷ chart capacity at the working radius × 100%
Check whether the manufacturer's chart already deducts the hook block, jib or other items, and use the radius at the worst point of the lift. Above the site's critical-lift threshold, a detailed lift plan and approval are normally required.
Related reading: crane lift planning and critical lifts. See also the sling load calculator and ground bearing calculator.
Estimates for planning and education only. Verify against the applicable code edition, manufacturer data and a competent engineer.
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Need it fabricated or installed?
Drawings, a bill of quantities or a description of the problem. An engineer reviews every enquiry and comes back to you directly.