South Carolina Frost Laws & Spring Thaw Limits

How South Carolina handles spring thaw

South Carolina posts no spring thaw restrictions. The ground doesn't freeze deep enough to soften the sub-base, so there's no seasonal axle cut and no SCDOT frost order to pull. Legal weight holds all year (S.C. Code § 56-5-4130): 20,000 lb single axle on low-pressure tires. Still read posted bridge and local-road weight-limit signs. Those caps run year-round, and overweight is fined 4 to 10 cents per pound over (§ 56-5-4160).

Window, reduction, and where to check

• Season: No seasonal restrictions. South Carolina declares no spring thaw / frost order; the same weight limits apply in March as in August.
• Reduction: None. No seasonal percentage reduction and no posted spring tonnage caps. Year-round limits stand: 20,000 lb single axle on low-pressure tires.
• Interstates: Exempt from the seasonal reduction
• Find the current order: No seasonal load-restriction page at the South Carolina Department of Transportation (SCDOT), because there's no frost program. Obey posted bridge and county-road weight-limit signs year-round. Enforcement runs through the SC Highway Patrol / DPS, and heavy loads clear through the SCDOT permit office.
• Overweight penalty: No seasonal-overweight fine, since nothing seasonal exists to exceed. Plain overweight is graduated per pound over: 4 cents (500 to 3,500 lb over), 6 cents (3,501 to 6,000), 10 cents (6,001+); the 6-cent and 10-cent rates are charged from the first pound over (S.C. Code § 56-5-4160).

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