Hoisting — Winch Pull & Anchor Load
Winch Pull & Anchor Load calculation for hoisting and winching work.
Skidding pull is friction arithmetic until the slope term joins — at 10% grade a µ=0.4 drag needs a third more pull. The anchor is the part that bites: a winch only pulls as hard as its anchorage resists, and 'that column looks strong' has dragged more than one column out of plumb.
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.
Winch Pull & Anchor Load 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 — Winch Pull & Anchor Load
Hoisting — Winch Pull & Anchor Load computes the governing relationship P = W(µ·cosθ + sinθ) · anchor = P × 1.25 live as you type. Skidding pull is friction arithmetic until the slope term joins — at 10% grade a µ=0.4 drag needs a third more pull. The anchor is the part that bites: a winch only pulls as hard as its anchorage resists, and 'that column looks strong' has dragged more than one column out of plumb. 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 — Winch Pull & Anchor Load
- 1Enter your values — Skidded load weight, Skidding friction µ, Slope (sensible defaults are pre-filled).
- 2Read the live results: Required pull, Anchor design load (×1.25).
- 3Check the "with your numbers" line to see P = W(µ·cosθ + sinθ) · anchor = P × 1.25 substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Hoisting — Winch Pull & Anchor Load?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula P = W(µ·cosθ + sinθ) · anchor = P × 1.25 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)
- ✓Skidding pull is friction arithmetic until the slope term joins — at 10% grade a µ=0.4 drag needs a third more pull.
- ✓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 — winch pull & anchor load use?+
It evaluates P = W(µ·cosθ + sinθ) · anchor = P × 1.25, 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?+
Skidding pull is friction arithmetic until the slope term joins — at 10% grade a µ=0.4 drag needs a third more pull. 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?+
Winch Pull & Anchor Load calculation for hoisting and winching work. A free crane load, wind & rigging safety tool. The anchor is the part that bites: a winch only pulls as hard as its anchorage resists, and 'that column looks strong' has dragged more than one column out of plumb. 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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