Wind at Hook Height — Crane Erection/Climbing Day
Power-law wind speed at crane height for a crane erection/climbing day, with gust estimate and limit check.
Erection and climbing days have the tightest limits of a tower crane's life — typically 9–12 m/s at the work height, because half-assembled structures lack their designed bracing. The calculator converts tonight's forecast into the morning's go/no-go at the actual climbing height.
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.
Power-law wind speed at crane height for a crane erection/climbing day, with gust estimate and limit check. A free crane load, wind & rigging safety tool — no sign-up, no upload, instant results in your browser.
About Wind at Hook Height — Crane Erection/Climbing Day
Wind at Hook Height — Crane Erection/Climbing Day computes the governing relationship v(z) = v₁₀ · (z/10)^α [power-law profile] live as you type. Erection and climbing days have the tightest limits of a tower crane's life — typically 9–12 m/s at the work height, because half-assembled structures lack their designed bracing. The calculator converts tonight's forecast into the morning's go/no-go at the actual climbing height. 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 Wind at Hook Height — Crane Erection/Climbing Day
- 1Enter your values — Reference wind at 10 m, Hook/jib height, Terrain exponent α, Gust factor and more (sensible defaults are pre-filled).
- 2Read the live results: Mean wind at height, Gust at height, Amplification vs 10 m.
- 3Check the "with your numbers" line to see v(z) = v₁₀ · (z/10)^α [power-law profile] substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Wind at Hook Height — Crane Erection/Climbing Day?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula v(z) = v₁₀ · (z/10)^α [power-law profile] with authoritative sources cited on the page (ASCE 7 — Wind load provisions (power-law profiles); EN 13001 / EN 14439 — Crane design & tower crane standards)
- ✓Erection and climbing days have the tightest limits of a tower crane's life — typically 9–12 m/s at the work height, because half-assembled structures lack their designed bracing.
- ✓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 wind at hook height — crane erection/climbing day use?+
It evaluates v(z) = v₁₀ · (z/10)^α [power-law profile], exactly as published. Sources: ASCE 7 — Wind load provisions (power-law profiles); EN 13001 / EN 14439 — Crane design & tower crane standards. 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?+
Erection and climbing days have the tightest limits of a tower crane's life — typically 9–12 m/s at the work height, because half-assembled structures lack their designed bracing. 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?+
Power-law wind speed at crane height for a crane erection/climbing day, with gust estimate and limit check. A free crane load, wind & rigging safety tool. The calculator converts tonight's forecast into the morning's go/no-go at the actual climbing height. 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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