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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 52,500 lb
3/8"3/4"1-1/4"

General rigging and lifting

Correctly made, full bury · 100% efficiency

Safe working load

10,500lb

46.7 kN · 5 short ton

Minimum break strength
52,500 lb
÷ design factor 5:1
10,500 lb
× termination 100%
10,500 lb
× bend factor 100%
10,500 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.

Thermion-AR3/4"12-Strand Single Braid