Rigging Hardware — Synthetic Web Sling
Synthetic Web Sling capacity check with the standard derating rules applied.
Web slings die by the edge, not the load: a sharp corner at tension is a slow-motion bandsaw, and most catastrophic web failures show a clean cut. Corner protectors aren't accessories — they're the sling's PPE. Sunlight is the slow killer: faded, stiff webbing has quietly lost real strength.
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.
Synthetic Web Sling 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 — Synthetic Web Sling
Rigging Hardware — Synthetic Web Sling computes the governing relationship capacity = tag WLL × hitch factor × edge factor live as you type. Web slings die by the edge, not the load: a sharp corner at tension is a slow-motion bandsaw, and most catastrophic web failures show a clean cut. Corner protectors aren't accessories — they're the sling's PPE. Sunlight is the slow killer: faded, stiff webbing has quietly lost real strength. 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 — Synthetic Web Sling
- 1Enter your values — Rated vertical WLL (per ply tag), Hitch factor, Edge condition factor (sensible defaults are pre-filled).
- 2Read the live results: Configuration capacity.
- 3Check the "with your numbers" line to see capacity = tag WLL × hitch factor × edge factor substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Rigging Hardware — Synthetic Web Sling?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula capacity = tag WLL × hitch factor × edge factor 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.)
- ✓Web slings die by the edge, not the load: a sharp corner at tension is a slow-motion bandsaw, and most catastrophic web failures show a clean cut.
- ✓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 — synthetic web sling use?+
It evaluates capacity = tag WLL × hitch factor × edge factor, 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?+
Web slings die by the edge, not the load: a sharp corner at tension is a slow-motion bandsaw, and most catastrophic web failures show a clean cut. 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?+
Synthetic Web Sling capacity check with the standard derating rules applied. A free crane load, wind & rigging safety tool. Corner protectors aren't accessories — they're the sling's PPE. 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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