Hoisting — Hoist Speed vs Reeving
Hoist Speed vs Reeving calculation for hoisting and winching work.
Tower cranes re-reeve between 2 and 4 falls for exactly this equation: double capacity, half speed. On a 40-storey pour the difference between 2-fall concrete buckets and 4-fall is hours per day of hook time — the reeving decision is a production decision wearing a rigging hat.
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.
Hoist Speed vs Reeving 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 — Hoist Speed vs Reeving
Hoisting — Hoist Speed vs Reeving computes the governing relationship v_hook = v_drum / n · t = h / v_hook live as you type. Tower cranes re-reeve between 2 and 4 falls for exactly this equation: double capacity, half speed. On a 40-storey pour the difference between 2-fall concrete buckets and 4-fall is hours per day of hook time — the reeving decision is a production decision wearing a rigging hat. 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 — Hoist Speed vs Reeving
- 1Enter your values — Rope speed at drum, Parts of line, Lift height (sensible defaults are pre-filled).
- 2Read the live results: Hook speed, Time for the lift.
- 3Check the "with your numbers" line to see v_hook = v_drum / n · t = h / v_hook substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Hoisting — Hoist Speed vs Reeving?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula v_hook = v_drum / n · t = h / v_hook 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)
- ✓Tower cranes re-reeve between 2 and 4 falls for exactly this equation: double capacity, half speed.
- ✓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 — hoist speed vs reeving use?+
It evaluates v_hook = v_drum / n · t = h / v_hook, 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?+
Tower cranes re-reeve between 2 and 4 falls for exactly this equation: double capacity, half speed. 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?+
Hoist Speed vs Reeving calculation for hoisting and winching work. A free crane load, wind & rigging safety tool. On a 40-storey pour the difference between 2-fall concrete buckets and 4-fall is hours per day of hook time — the reeving decision is a production decision wearing a rigging hat. 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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