Rigging Hitch Capacity Calculator

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The sling tag's vertical-hitch working load limit. 19.6 kN ≈ a 2-tonne sling.
N
How the sling connects to the load.
Card values run 75–80%. Choke angles under ~120° reduce capacity further — use the tag/maker chart value.
% of vertical

Results

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Rated capacity in this hitch
14,720N
Pass

Vertical WLL × hitch factor × angle factor — the tag and ASME B30.9 govern.

Also computed

Effective multiplier0.75

Versus the vertical rating, angle included.

Angle factor(sin θ)1

Method notes 4 notes
  • Hitch factors are the standard rigging-card values (vertical 100%, choker ≈75–80%, basket ≈200% with vertical legs) kept user-adjustable — the sling's tag and the maker's chart per ASME B30.9 govern, and this screen never overrides them.
  • Basket and choker hitches bend the sling: the tag's minimum D/d ratio must be met at the bend or the chart's reduced capacity applies — enter that reduced factor here.
  • Choke angles under ~120° (load cinched hard against itself) cut capacity below the nominal choker factor — the maker's chart carries those reductions.
  • Multi-leg bridle tension and per-leg loads live in the sling angle load calculator; load weight itself in the metal weight calculator.

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