How strap WLL sizing works
50% AWLL, length counts, indirect vs direct.
FMCSA-style strap WLL sizing
Ratchet strap WLL calculator
Enter cargo weight, article length, and tie mode. Get aggregate WLL need, minimum tiedown count, and a 3,333 / 4,000 lb strap class — or NO_MATCH. Not legal advice; confirm labeled WLL.
FMCSA-style strap WLL sizing
Result
Aggregate WLL ≥ 50% of cargo. Mode 1 = indirect (100% WLL each); mode 2 = direct (50% WLL each). Plus length-based minimum count. Classes: 3,333 · 4,000 lb WLL. Not legal advice.
From measurement to decision
Open the full calculator
Same tool with room for examples.
3,333 vs 4,000 lb classes
When each class fits — and when none do.
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