Gross Combination Weight Check
Whether a tractor-trailer is within its weight limits: the combined power-unit plus trailer weight checked against both the manufacturer's rated GCWR and the federal 80,000 lb gross cap (editable), reporting each margin and the binding limit. Axle and bridge-formula limits are separate checks; a permit or the AHJ governs an over-limit move.
Formula and source
combined = tractor + trailer; the binding limit is min(GCWR, federal_max); ok if combined <= binding, else over by combined - binding. GCWR margin and federal margin are reported separately.
23 CFR 658.17 (80,000 lb federal gross) and 49 CFR 393.75 by section, with the manufacturer's GCWR rating plate; limits not reproduced.
Audience
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Posture
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