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Texasoperating inSouth Carolina
Standard Federal — 80,000 lbs GVW, federal rules only

South Carolina

Interstate GVW
80,000 lbs
Height Limit
13 ft 6 in
Width Limit
8 ft 6 in
Permits Honored
No

Weight Limits

South Carolina interstate GVW limit: 80,000 lbs. Per-axle limits: Single axle 20,000 lbs, Tandem axle 34,000 lbs, Tridem axle 42,000 lbs. Federal bridge formula applies. Enforcement tolerance: Limited tolerance on axle weights.

Size Limits

Height: 13 ft 6 in. Width: 8 ft 6 in. Trailer length: 53 ft (semitrailer). Overall combination length: No overall limit for tractor-semitrailer.

Oversize/Overweight Permits

Oversize/overweight permits through SCDOT online system Fees: Single-trip: $15; Annual: $50+. Texas oversize permits are not directly honored in South Carolina. You will need to obtain a South Carolina-specific permit for oversize/overweight loads. Apply online: https://www.scdot.org/business/permits-osow.html Enforcement: SCDPS and SCDOT enforcement; weigh stations on major corridors.

Exemptions

Agricultural: Agricultural vehicles exempt on state highways. Timber/Forestry: Timber vehicles allowed higher weights on state roads with permit.

Official Source

For the most current weight and size regulations, permit applications, and seasonal restriction updates, visit the official South Carolina DOT page at https://www.scdot.org/business/permits-osow.html. Contact the South Carolina Department of Transportation for specific routing questions.

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Law last updated: 2025Row last reviewed: Apr 27, 2026

Weight and size limits are subject to change. Always verify current limits on the official state DOT website before travel. Seasonal restrictions, bridge postings, and local ordinances may further reduce allowable weights. Data reflects 2025-2026 regulations where available.