Methodology guide
Limits, first-wrap caveat, and when to stop shopping this ladder.
Calculator
Winch size calculator
Enter GVWR and terrain code. Get minimum rated line pull and a 4,500 / 6,000 / 12,000 lb class or NO_MATCH.
Result
Required ≈ GVWR × 1.5 × terrain (1.0 / 1.1 / 1.25). Worked check: 5,600 × 1.5 = 8,400 → 12,000 lb class.
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