Lift Planning — Up-Ending Load Shift
Up-Ending Load Shift for engineered lift planning.
Up-ending a column or vessel migrates load from the tailing crane to the main hook continuously — the main crane's WORST case is the vertical moment, not the start. Run this at several angles and check the main crane's chart at each: many two-crane upend plans fail at 80°, not at 0°.
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.
Up-Ending Load Shift for engineered lift planning. A free crane load, wind & rigging safety tool — no sign-up, no upload, instant results in your browser.
About Lift Planning — Up-Ending Load Shift
Lift Planning — Up-Ending Load Shift computes the governing relationship crane share = W·x_CG/x_top, both projected on the horizontal — shares migrate as θ grows live as you type. Up-ending a column or vessel migrates load from the tailing crane to the main hook continuously — the main crane's WORST case is the vertical moment, not the start. Run this at several angles and check the main crane's chart at each: many two-crane upend plans fail at 80°, not at 0°. 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 Lift Planning — Up-Ending Load Shift
- 1Enter your values — Item weight, CG from base end, Item length, Current angle from horizontal (sensible defaults are pre-filled).
- 2Read the live results: Crane (top) share, Tail/base share.
- 3Check the "with your numbers" line to see crane share = W·x_CG/x_top, both projected on the horizontal — shares migrate as θ grows substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Lift Planning — Up-Ending Load Shift?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula crane share = W·x_CG/x_top, both projected on the horizontal — shares migrate as θ grows with authoritative sources cited on the page (ASME B30.5/B30.9/B30.20 — Cranes, slings and below-the-hook devices; OSHA 29 CFR 1926 Subpart CC — Cranes & derricks in construction; DNV-ST-N001 — Marine operations (DAF methodology))
- ✓Up-ending a column or vessel migrates load from the tailing crane to the main hook continuously — the main crane's WORST case is the vertical moment, not the start.
- ✓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 lift planning — up-ending load shift use?+
It evaluates crane share = W·x_CG/x_top, both projected on the horizontal — shares migrate as θ grows, exactly as published. Sources: ASME B30.5/B30.9/B30.20 — Cranes, slings and below-the-hook devices; OSHA 29 CFR 1926 Subpart CC — Cranes & derricks in construction; DNV-ST-N001 — Marine operations (DAF methodology). 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?+
Up-ending a column or vessel migrates load from the tailing crane to the main hook continuously — the main crane's WORST case is the vertical moment, not the start. 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?+
Up-Ending Load Shift for engineered lift planning. A free crane load, wind & rigging safety tool. Run this at several angles and check the main crane's chart at each: many two-crane upend plans fail at 80°, not at 0°. 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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