27 CAR § 111-306. Single/tandem/tridem/quadrum axle load limits

(a) Single axle load permitted. No permit shall be issued for the movement of a vehicle, other than a vehicle of special design as noted in 27 CAR § 111-401 et seq., if the gross weight imposed upon the highway by the wheels of any one (1) single axle exceeds twenty thousand pounds (20,000 lbs.). (b) Tandem axle load permitted. Other than a front or steering tandem axle and other than those on a vehicle of special design as noted in 27 CAR § 111-401 et seq., the total gross weight imposed upon the highways by a tandem axle configuration shall not exceed forty-six thousand pounds (46,000 lbs.), and no one (1) axle of any such group shall exceed twenty-three thousand pounds (23,000 lbs.). (c) Tridem axle load permitted. The total gross weight imposed upon the highway in a tridem configuration on any vehicle, other than a vehicle of special design as noted in 27 CAR § 111-401 et seq., shall not exceed sixty thousand pounds (60,000 lbs.), and no one (1) axle of any such group shall exceed twenty thousand pounds (20,000 lbs.). (d) Quadrum axle load permitted. The total gross weight imposed upon the highways by a quadrum axle configuration on any vehicle, other than a vehicle of special design as noted in 27 CAR § 111-401 et seq., shall not exceed sixty-eight thousand pounds (68,000 lbs.), and the weight on any one (1) axle of any such group shall not exceed seventeen thousand pounds (17,000 lbs.). (e) The total gross weight imposed upon the highway by the wheels of any one (1) single trunnion axle, other than a vehicle of special design as described in 27 CAR § 111-401 et seq., traveling under authority of an overload permit shall not exceed twenty thousand pounds (20,000 lbs.).