Sling Angle Load Calculator

Inputs

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Known lifted load, including below-the-hook rigging that is carried by the sling set.
lbf
Count only sling legs that actually share the load. Unequal four-leg lifts often need a conservative lower loaded-leg count.
legs
Use the angle you can measure reliably. Included angle mode assumes a symmetric bridle.
Angle measured from the horizontal plane to the sling leg. A vertical leg is 90 deg.
°
Rated working load limit per sling leg for the sling type and hitch before this simple angle-utilization screen.
lbf

Results

Default result
Edit inputs
Leg tension(T)
577.4lbf
Pass

2.568 kN · 577.4 lbf · 0.262 t

Also computed

Angle factor(1/sin(theta))Pass1.155x

Effective horizontal angle(theta)60°

Vertical share per leg(W/n)500lbf

2.224 kN · 500 lbf

Horizontal component per leg(H)288.7lbf

1.284 kN · 288.7 lbf

Required per-leg WLL(WLLmin)577.4lbf

2.568 kN · 577.4 lbf

Total capacity at angle(C)5,196lbf

23.11 kN · 5,196 lbf

Method notes 3 notes
  • Leg tension uses T = W / (n x sin(theta)), where theta is the angle from horizontal and n is the loaded-leg count.
  • Included angle mode assumes symmetric opposite legs and converts to theta = 90 - A/2.
  • This is a geometry and WLL utilization screen only. Final lifting decisions need actual sling tags/tables, hitch factors, D/d, hardware, center of gravity, dynamic effects, inspection condition and qualified rigging review.

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