S.C. Code § 56-5-4860
Every motor vehicle and combination of vehicles, at all times and under all conditions of loading, upon application of the service brake, shall be capable of:
Tests for deceleration and stopping distance shall be made on a substantially level (not to exceed plus or minus one per cent grade), dry, smooth, hard surface that is free from loose material.
Classification of Vehicles | Braking force at a percentage of gross vehicle or combination weight | Deceleration in feet per second | Brake System application and braking distance in feet from an initial speed of 20 m.p.h. | |
(A) | Passenger vehicles with a seating capacity of ten people or less including driver, not having a manufacturer's gross vehicle weight rating | 52.8% | 17 | 25 |
(B-1) | All motorcycles and motor-driven cycles | 43.5% | 14 | 30 |
(B-2) | Single unit vehicles with a manufacturer's gross vehicle weight rating of 10,000 pounds or less | 43.5% | 14 | 30 |
(C-1) | Single unit vehicles with a manufacturer's gross weight rating of more than 10,000 pounds | 43.5% | 14 | 40 |
(C-2) | Combination of a two-axle towing vehicle and a trailer with a gross trailer weight of 3,000 pounds or less | 43.5% | 14 | 40 |
(C-3) | Buses, regardless of the number of axles, not having a manufacturer's gross weight rating | 43.5% | 14 | 40 |
(C-4) | All combinations of vehicles in driveaway-towaway operations | 43.5% | 14 | 40 |
(D) | All other vehicles and combinations of vehicles | 43.5% | 14 | 50 |
S.C. Code § 56-5-4860