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Ropebraiders
Engineering tools

Working loadcalculator

Break strength is not working load. Design factor, termination, bend radius and sling angle all sit between the two — this shows each one's contribution rather than hiding them behind a single number.
MBS 372,000 lb
3/4"1-3/4"3"

General rigging and lifting

Correctly made, full bury · 100% efficiency

Safe working load

74,400lb

330.9 kN · 37 short ton

Minimum break strength
372,000 lb
÷ design factor 5:1
74,400 lb
× termination 100%
74,400 lb
× bend factor 100%
74,400 lb

Indicative only. Not a substitute for a rigging plan signed by a competent person, and it does not account for shock loading, dynamic amplification, temperature, chemical exposure or rope condition in service.

Apex-12 MAX1-3/4"12-Strand Single Braid