Also in: Disaster Response and Recovery

Sling Angle Load Multiplier

Tension per leg from load, configuration, and included angle.

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Example

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Checked against published worked examples from: OSHA 1926.251 + ASME B30.9 sling-angle practice.

Details, formula, and sources

Formula or tablePer-leg tension L = W / (n × cos(θ/2)) for basket / bridle slings at included (apex) angle θ (tension is W/n with legs vertical and diverges as the legs open toward horizontal); vertical L = W / n; choker reduction factor 0.75 applied per ASME B30.9.

Source and editionASME B30.9 (Slings) by name and section.

Free accessASME B30.9 licensed; principles free at OSHA 29 CFR 1910.184 (free at ecfr.gov) and at major manufacturer (Crosby, Lift-It) technical pages.

What governsEstimate. AHJ and licensed fire protection engineer govern.

API field namesload_lb, sling_config, n_legs, tension_per_leg_lb, choker_factor

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