Hoisting — Lever Hoist (Come-Along) Check
Lever Hoist (Come-Along) Check calculation for hoisting and winching work.
Lever hoists are the most abused tool in rigging: the cheater pipe on the handle defeats the designed human-force limit and overloads the brake invisibly. The off-axis entry matters in skidding work — pulling 20° off the load path adds 6%, 40° adds 30%, and side-loaded hooks lose rating fast.
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.
Lever Hoist (Come-Along) Check calculation for hoisting and winching work. A free crane load, wind & rigging safety tool — no sign-up, no upload, instant results in your browser.
About Hoisting — Lever Hoist (Come-Along) Check
Hoisting — Lever Hoist (Come-Along) Check computes the governing relationship F = W / cos(θ_offaxis) vs WLL live as you type. Lever hoists are the most abused tool in rigging: the cheater pipe on the handle defeats the designed human-force limit and overloads the brake invisibly. The off-axis entry matters in skidding work — pulling 20° off the load path adds 6%, 40° adds 30%, and side-loaded hooks lose rating fast. 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 Hoisting — Lever Hoist (Come-Along) Check
- 1Enter your values — Load to pull/tension, Pull direction vs load path, Hoist WLL (sensible defaults are pre-filled).
- 2Read the live results: Effective load on hoist, Utilization.
- 3Check the "with your numbers" line to see F = W / cos(θ_offaxis) vs WLL substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Hoisting — Lever Hoist (Come-Along) Check?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula F = W / cos(θ_offaxis) vs WLL with authoritative sources cited on the page (Wire Rope Technical Board — Wire Rope Users Manual, 4th ed.; ASME B30.5/B30.9/B30.20 — Cranes, slings and below-the-hook devices)
- ✓Lever hoists are the most abused tool in rigging: the cheater pipe on the handle defeats the designed human-force limit and overloads the brake invisibly.
- ✓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 hoisting — lever hoist (come-along) check use?+
It evaluates F = W / cos(θ_offaxis) vs WLL, exactly as published. Sources: Wire Rope Technical Board — Wire Rope Users Manual, 4th ed.; ASME B30.5/B30.9/B30.20 — Cranes, slings and below-the-hook devices. 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?+
Lever hoists are the most abused tool in rigging: the cheater pipe on the handle defeats the designed human-force limit and overloads the brake invisibly. 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?+
Lever Hoist (Come-Along) Check calculation for hoisting and winching work. A free crane load, wind & rigging safety tool. The off-axis entry matters in skidding work — pulling 20° off the load path adds 6%, 40° adds 30%, and side-loaded hooks lose rating fast. 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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