Crane Net Capacity After Deductions
Net capacity for the hook after the OSHA 1926.1417(o) deduction stack (hook block, jib, wire rope), the total hook load, the percent of net, and the 75 / 90 / 100 percent flags. The manufacturer's load chart governs.
Formula and source
net = gross_chart - hook_block - jib - wire_rope; total_hook = load + below_hook; pct_of_net = total_hook / net x 100; flags at 75 / 90 / 100%.
OSHA 29 CFR 1926.1417(o) deduction stack and ASME B30.5 (Mobile and Locomotive Cranes) by name; arithmetic on chart numbers.
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