South Carolina OSOW permits

Updated: Sep 2

Permits are valid for seven days. Must have a permit prior to entering the state.

South Carolina permitting system:!input.action;jsessionid=LBBYTcJCLLGkwMZw__uonUuGRACA_O9rVtNZA3EaBsZEpvxGAtCW!-1641033939

Contact phone number: 1-803-737-6769


One-half hour after sunrise to one-half hour before sunset, Monday through Saturday. No Sunday travel. Overweight only not over 130,000 pounds gross may have continuous travel if they can maintain traffic flow speed. Over 130,000 pounds may travel Monday through Friday only.


No loads over 12' wide up to 15' wide are to be moved over state highways in close proximity to large urban areas between the hours of 7:00 – 9:00 AM and 3:00 – 6:00 PM on school days and 4:30 – 6:00 PM on other days, and loads over 15' wide up to 16' wide must be moved between the hours of 9:00 – 3:00 during school days and 9:00 – 4:00 other days. Routes between I-95 and the Myrtle Beach area are prohibited on Friday and Saturday from Memorial Day through Labor Day. No travel on major holidays and holiday weekends. Double-check with the Sammons Permit Office for holiday restrictions.


Width: 8'6" Interstate and designated highways

Height: 13'6

Length: 53'0 semitrailer and load (not to exceed 41' from the center of the kingpin to center of rear tandem).

Overhang: 5' rear overhang on a 48' semitrailer, none on a 53'

Note: SC will not permit overhang with multiple pieces. They will only permit it with a non-divisible load.

Weight: 80,000 Gross Single – 20,000 Tandem – 34,000 Tridem – 35,200 depends on spacings


Width: 16'

Length: 125'

Overhang: 3' front of the trailer, 10' rear on 48' to 53' semitrailer

Height: No set limits – determined by the route. Must be at least 6" less than any overhead structure.

Weight: 5 axles – 90,000 6 axles – 110,000 7 axles – 130,000 Single – 20,000 Tandem – 40,000 Tridem – 60,000 Quad – 80,000 Loads exceeding these dimensions are considered as super loads.


Width: Over 12' on 2-lane highways – 1 escort; over 14' (all highway) – 2 escorts, over 16' – 3 escorts at minimum, and may require a police escort.

Height: Not specified. The permittee is responsible for vertical clearances.

Length: Not specified

Overhang: Over 10' rear – 1 escort


Implements of husbandry, including farm tractors, forestry equipment, and road machinery, are exempt from needing permits when the load is not over 12' wide, 13'6 high, or 90,000 pounds gross. This exemption is for daylight running and may run seven days a week.


"Oversize Load" signs are required at the front and rear for all loads exceeding 12' wide, and flags are required on each corner. A rotating amber beacon or strobe light is required on the rear of loads exceeding 12' wide up to 14' wide. When width is over 14' wide up to 16' wide, a rotating amber beacon or strobe is required on each outer rear corner of the load. For any rear overhang of 4' or more, a red flag must be displayed at the extreme rear of the load, and a rotating amber beacon light or strobe light must be displayed there when traveling from one-half hour after sunset to one-half hour before sunrise, or when windshield wipers must be used or inclement weather or other conditions reduce visibility below 500 feet.

  • Facebook - White Circle
  • Instagram - White Circle