Rigging Hardware — Wire Rope (EIPS IWRC)
Wire Rope (EIPS IWRC) capacity check with the standard derating rules applied.
The 50·d² rule reproduces EIPS IWRC catalog values within a few percent across the common range — handy when the table isn't. It approximates NEW rope: broken wires, kinks, crushing and corrosion derate the real thing; ASME B30.9 lists the retirement criteria the rule can't see.
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.
Wire Rope (EIPS IWRC) 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 — Wire Rope (EIPS IWRC)
Rigging Hardware — Wire Rope (EIPS IWRC) computes the governing relationship MBS ≈ 50·d² (US tons, d in inches — EIPS IWRC rule) · WLL = MBS/SF live as you type. The 50·d² rule reproduces EIPS IWRC catalog values within a few percent across the common range — handy when the table isn't. It approximates NEW rope: broken wires, kinks, crushing and corrosion derate the real thing; ASME B30.9 lists the retirement criteria the rule can't see. 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 — Wire Rope (EIPS IWRC)
- 1Enter your values — Rope diameter, Design factor (sensible defaults are pre-filled).
- 2Read the live results: Approx. breaking strength, Working load limit.
- 3Check the "with your numbers" line to see MBS ≈ 50·d² (US tons, d in inches — EIPS IWRC rule) · WLL = MBS/SF substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Rigging Hardware — Wire Rope (EIPS IWRC)?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula MBS ≈ 50·d² (US tons, d in inches — EIPS IWRC rule) · WLL = MBS/SF 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.)
- ✓The 50·d² rule reproduces EIPS IWRC catalog values within a few percent across the common range — handy when the table isn't.
- ✓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 — wire rope (eips iwrc) use?+
It evaluates MBS ≈ 50·d² (US tons, d in inches — EIPS IWRC rule) · WLL = MBS/SF, 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?+
The 50·d² rule reproduces EIPS IWRC catalog values within a few percent across the common range — handy when the table isn't. 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?+
Wire Rope (EIPS IWRC) capacity check with the standard derating rules applied. A free crane load, wind & rigging safety tool. It approximates NEW rope: broken wires, kinks, crushing and corrosion derate the real thing; ASME B30.9 lists the retirement criteria the rule can't see. 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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