Rigging runs a stricter safety factor than cargo securement, and using the wrong one is how people get hurt. Enter break strength for the working load limit under standard rigging practice, plus where tie-down hardware must never be used.
Calculate Break Strength and Safe Working Load for Any Rigging Setup
WLL is not break strength. Confusing the two is how equipment fails and people get hurt. Know the actual numbers for your rigging.
Enter your strap or chain type, grade, and dimensions. The calculator outputs the break strength, WLL (at the applicable safety factor), and the maximum legal working load.
OSHA and FMCSA both require rigging to operate within its rated WLL. Breaking load is typically 3–7x the WLL — using break strength as a working load is a violation.
Riggers, flatbed operators, fleet managers, and off-road recovery teams.
- ASME B30.9 rigging standards
- OSHA 1910.184
- FMCSA 49 CFR §393.106
- SAE J270
Disclaimer: This tool is provided for educational and informational purposes only and does not constitute legal, safety, or professional advice. Sunferno Automotive Accessories cannot verify how products are installed, used, or attached in your specific vehicle or situation — proper installation, use, and securement are solely the responsibility of the user. Laws and regulations vary by jurisdiction and change over time; always confirm current requirements with your local authorities or a qualified professional. Sunferno products must be used strictly in accordance with manufacturer instructions and applicable regulations.