Standards-compliant calculators for crane inspectors in NZ & Australia. Free, no signup required. Works on mobile.
Check IRD for your bracket.
10–20% is typical for a sole trader.
Dedicated calculators for crane inspectors. Bookmark the ones you use most.
Load utilisation % and safety margin from rated capacity and actual load. 80% utilisation best practice.
Reduction factor and effective lift WLL for 2, 3 and 4-leg slings. Warning above 120° per AS 4991.