Sling Tension — Basket Hitch
Per-leg tension for a basket hitch from load, sling angle and hitch efficiency.
A true vertical basket doubles capacity — two legs of the same sling share the load. The catch is 'true vertical': spread the legs to clear a wide load and the angle penalty claws the bonus back. D/d ratio at the bend governs too; see the hardware tools in this category.
Formula
Note: Rigging and crane decisions are life-safety critical. This calculator is a planning aid — the load chart, sling tags, site lift plan and a qualified lift director govern every real lift.
Per-leg tension for a basket hitch from load, sling angle and hitch efficiency. A free crane load, wind & rigging safety tool — no sign-up, no upload, instant results in your browser.
About Sling Tension — Basket Hitch
Sling Tension — Basket Hitch computes the governing relationship T = W / (n · sinθ) · required WLL = T ÷ hitch efficiency live as you type. A true vertical basket doubles capacity — two legs of the same sling share the load. The catch is 'true vertical': spread the legs to clear a wide load and the angle penalty claws the bonus back. D/d ratio at the bend governs too; see the hardware tools in this category. Defaults are pre-filled with realistic values for this exact scenario, and the worked example substitutes your numbers step by step so the math is never a black box.
How to use Sling Tension — Basket Hitch
- 1Enter your values — Load weight, Sling angle from horizontal, Load-bearing legs, Hitch efficiency (sensible defaults are pre-filled).
- 2Read the live results: Tension per leg, Min sling WLL per leg, Angle multiplier.
- 3Check the "with your numbers" line to see T = W / (n · sinθ) · required WLL = T ÷ hitch efficiency substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Sling Tension — Basket Hitch?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula T = W / (n · sinθ) · required WLL = T ÷ hitch efficiency with authoritative sources cited on the page (ASME B30.5/B30.9/B30.20 — Cranes, slings and below-the-hook devices; Wire Rope Technical Board — Wire Rope Users Manual, 4th ed.)
- ✓A true vertical basket doubles capacity — two legs of the same sling share the load.
- ✓SI ⇄ Imperial toggle converts your inputs in place, so you can work in the units your drawings use
Frequently asked questions
What formula does the sling tension — basket hitch use?+
It evaluates T = W / (n · sinθ) · required WLL = T ÷ hitch efficiency, exactly as published. Sources: ASME B30.5/B30.9/B30.20 — Cranes, slings and below-the-hook devices; Wire Rope Technical Board — Wire Rope Users Manual, 4th ed.. The substituted worked example on the page lets you verify every step against the textbook.
How should I read the result — and how far can I trust it?+
A true vertical basket doubles capacity — two legs of the same sling share the load. Rigging and crane decisions are life-safety critical. This calculator is a planning aid — the load chart, sling tags, site lift plan and a qualified lift director govern every real lift.
When is this calculator the right tool for the job?+
Per-leg tension for a basket hitch from load, sling angle and hitch efficiency. A free crane load, wind & rigging safety tool. The catch is 'true vertical': spread the legs to clear a wide load and the angle penalty claws the bonus back. For neighbouring scenarios, the related tools below cover the same engine with different presets.
Does it support both metric and imperial units?+
Yes — the SI ⇄ Imperial toggle converts the values already in the fields, preserving the physical quantity, so you can flip mid-calculation without re-entering anything.
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