Tandem Pick Share — Tandem Tower Pick Share
Load share per crane in a two-crane pick from CG position, with each share checked as a moment.
When one panel needs two towers, each crane's share follows the seesaw rule and BOTH must clear their own chart at their own radius — plus the standard tandem derate (commonly 20–25%) for load-share uncertainty. The calculator does the share; the derate discipline belongs to the lift plan.
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.
Load share per crane in a two-crane pick from CG position, with each share checked as a moment. A free crane load, wind & rigging safety tool — no sign-up, no upload, instant results in your browser.
About Tandem Pick Share — Tandem Tower Pick Share
Tandem Pick Share — Tandem Tower Pick Share computes the governing relationship W_A = W(L−x)/L; check M_A = W_A·r_A and M_B = W_B·r_B against each chart, derated 20–25% live as you type. When one panel needs two towers, each crane's share follows the seesaw rule and BOTH must clear their own chart at their own radius — plus the standard tandem derate (commonly 20–25%) for load-share uncertainty. The calculator does the share; the derate discipline belongs to the lift plan. 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 Tandem Pick Share — Tandem Tower Pick Share
- 1Enter your values — Total gross load, Hook-to-hook distance, CG from crane A hook, Crane A radius and more (sensible defaults are pre-filled).
- 2Read the live results: Crane A share, Crane B share, Crane A moment, Crane B moment.
- 3Check the "with your numbers" line to see W_A = W(L−x)/L; check M_A = W_A·r_A and M_B = W_B·r_B against each chart, derated 20–25% substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Tandem Pick Share — Tandem Tower Pick Share?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula W_A = W(L−x)/L; check M_A = W_A·r_A and M_B = W_B·r_B against each chart, derated 20–25% with authoritative sources cited on the page (EN 13001 / EN 14439 — Crane design & tower crane standards; ASME B30.5/B30.9/B30.20 — Cranes, slings and below-the-hook devices)
- ✓When one panel needs two towers, each crane's share follows the seesaw rule and BOTH must clear their own chart at their own radius — plus the standard tandem derate (commonly 20–25%) for load-share uncertainty.
- ✓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 tandem pick share — tandem tower pick share use?+
It evaluates W_A = W(L−x)/L; check M_A = W_A·r_A and M_B = W_B·r_B against each chart, derated 20–25%, exactly as published. Sources: EN 13001 / EN 14439 — Crane design & tower crane standards; 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?+
When one panel needs two towers, each crane's share follows the seesaw rule and BOTH must clear their own chart at their own radius — plus the standard tandem derate (commonly 20–25%) for load-share uncertainty. 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?+
Load share per crane in a two-crane pick from CG position, with each share checked as a moment. A free crane load, wind & rigging safety tool. The calculator does the share; the derate discipline belongs to the lift plan. 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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