South Carolina Oversize & Heavy Haul Transport Guide
Important: We are not a permit service and we do not arrange permits for carriers. All information provided below is for informational purposes only. Always read permits and provisions carefully as we cannot guarantee the accuracy of information provided below.
Transporting oversized loads in South Carolina requires careful planning to comply with statewide load regulations and safety requirements. Whether you’re managing heavy equipment transport or coordinating oversize freight solutions, understanding these rules ensures smooth, legal moves.
Permit Details & Operating Hours
- Single-Trip Permits: Valid for 7 days and must be secured before entering SC.
- Operating Times:
- Monday–Saturday: ½ hour after sunrise to ½ hour before sunset.
- No Sunday travel (except for overweight-only loads ≤130,000 lbs that can maintain traffic speed).
- Loads >130,000 lbs restricted to weekdays only.
Restricted Travel & Urban Curfews
- Peak-Hour Bans for Loads 12′–15′ Wide Near Major Cities:
- School days: 7–9 AM & 3–6 PM.
- Non-school days: 4:30–6 PM.
- Loads >15′ Wide: Must move 9 AM–3 PM (school days) or 9 AM–4 PM (other days).
- Summer Restrictions: No oversize travel on I-95 to Myrtle Beach routes Fridays/Saturdays (Memorial Day–Labor Day).
- No holiday/weekend travel for oversized loads.
Legal Dimensions & Weight Limits
- Standard Limits:
- Length: 53′ semitrailer (≤41′ kingpin to rear axle).
- Overhang: 5′ rear max (48′ trailers only; none allowed on 53′ trailers).
- Width: 8’6″ (Interstate & designated highways).
- Height: 13’6″.
- Weight: 80,000 lbs gross, Single axle: 20,000 lbs, Tandem axle: 34,000 lbs.
- Routine Permit Limits:
- Width: Up to 16′ (route-dependent).
- Height: Must clear structures by ≥6″.
- Weight: 5 axles: 90,000 lbs, 7 axles: 130,000 lbs, Tandem axle: 40,000 lbs.
Superloads (Extra Approval Required)
- Superloads exceed routine limits and require extra approval.
Escort & Safety Requirements
Pilot Vehicles:
- Width >12′ (2-lane roads): 1 escort.
- Width >14′ (all roads): 2 escorts.
- Width >16′: 3+ escorts (may need police).
- Rear overhang >10′: 1 escort.
Signage & Lighting:
- “Oversize Load” signs required (front/rear) for loads >12′ wide.
- Flags on all corners + amber beacons/strobes for:
- 12′–14′ wide: 1 rear beacon.
- >14′ wide: Beacons on both rear corners.
- Rear overhang ≥4′: Red flag + amber light in low visibility.
Exemptions & Special Cases
- Farm/forestry equipment (≤12′ wide, ≤13’6″ high, ≤90,000 lbs) exempt from permits.
- No multi-piece overhangs permitted—only non-divisible loads qualify.
Key Takeaways for Heavy Haul Logistics
- Plan routes to avoid urban curfews and summer restrictions.
- Verify escort needs based on load size.
- Superloads require extra time for approvals.
- Follow lighting/signage rules to avoid fines.
Conclusion
By understanding South Carolina’s oversize permit requirements, weight compliance, and pilot vehicle rules, you can streamline heavy haul project management and keep shipments on schedule. For up-to-date permit information, always check with the South Carolina Department of Transportation.