Rigging Hardware — Padeye Quick Check
Padeye Quick Check capacity check with the standard derating rules applied.
A padeye fails five ways — bearing, tear-out, tension across the hole, shear, weld — and this quick check covers only the first as a screening number. The geometry rule that prevents most field failures: hole diameter no more than pin + 6%, and edge distance ≥ 0.75× hole diameter all round.
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.
Padeye Quick Check capacity check with the standard derating rules applied. A free crane load, wind & rigging safety tool — no sign-up, no upload, instant results in your browser.
About Rigging Hardware — Padeye Quick Check
Rigging Hardware — Padeye Quick Check computes the governing relationship σ_bearing = F/(t·d) vs 0.9·Fy — one check of several a padeye needs live as you type. A padeye fails five ways — bearing, tear-out, tension across the hole, shear, weld — and this quick check covers only the first as a screening number. The geometry rule that prevents most field failures: hole diameter no more than pin + 6%, and edge distance ≥ 0.75× hole diameter all round. 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 Rigging Hardware — Padeye Quick Check
- 1Enter your values — Design sling tension, Plate thickness, Pin hole diameter, Plate yield strength (sensible defaults are pre-filled).
- 2Read the live results: Bearing stress at pin, Bearing allowable (0.9·Fy).
- 3Check the "with your numbers" line to see σ_bearing = F/(t·d) vs 0.9·Fy — one check of several a padeye needs substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Rigging Hardware — Padeye Quick Check?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula σ_bearing = F/(t·d) vs 0.9·Fy — one check of several a padeye needs with authoritative sources cited on the page (ASME B30.5/B30.9/B30.20 — Cranes, slings and below-the-hook devices; Wire Rope Technical Board — Wire Rope Users Manual, 4th ed.)
- ✓A padeye fails five ways — bearing, tear-out, tension across the hole, shear, weld — and this quick check covers only the first as a screening number.
- ✓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 rigging hardware — padeye quick check use?+
It evaluates σ_bearing = F/(t·d) vs 0.9·Fy — one check of several a padeye needs, exactly as published. Sources: ASME B30.5/B30.9/B30.20 — Cranes, slings and below-the-hook devices; Wire Rope Technical Board — Wire Rope Users Manual, 4th ed.. 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?+
A padeye fails five ways — bearing, tear-out, tension across the hole, shear, weld — and this quick check covers only the first as a screening number. 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?+
Padeye Quick Check capacity check with the standard derating rules applied. A free crane load, wind & rigging safety tool. The geometry rule that prevents most field failures: hole diameter no more than pin + 6%, and edge distance ≥ 0.75× hole diameter all round. 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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