South Carolina Code of Regulations
Chapter 38 - DEPARTMENT OF PUBLIC SAFETY
Article 5 - STATE TRANSPORT POLICE REGULATIONS
Subarticle 1 - UNMANUFACTURED FOREST PRODUCTS TRUCKING REGULATIONS
Part 38-393 - PARTS AND ACCESSORIES NECESSARY FOR SAFE OPERATION
Subpart A - GENERAL
Section 38-393.5 - Definitions
As used in 38-382, the following words and terms are construed to mean:
Aggregate working load limit. The summation of the working load limits or restraining capacity of all devices used to secure an article of cargo on a vehicle.
Anchor Point. Part of the structure, fitting or attachment on a vehicle or articles of cargo to which a tiedown is attached.
Antilock Brake System or ABS means a portion of a service brake system that automatically controls the degree rotational wheel slip during braking by:
Article of cargo. A unit of cargo, other than a liquid, gas, or aggregate that lacks physical structure (e.g., grain, gravel, etc. including articles grouped together so that they can be handled as a single unit or unitized by wrapping, strapping, banding or edge protection device(s).
Blocking. A structure, device or other substantial article placed against or around an article of cargo to prevent horizontal movement of the article of cargo.
Bracing. A structure, device, or another substantial article placed against an article of cargo to prevent it from tipping that may also prevent it from shifting.
Brake. An energy conversion mechanism used to stop, or hold a vehicle stationary.
Brake Tubing/Hose. Metallic brake tubing, nonmetallic brake tubing and brake hose are conduits or lines used in a brake system to transmit or contain the medium (fluid or vacuum) used to apply the motor vehicle's brakes.
Chassis. The load supporting frame in a truck or trailer, exclusive of any appurtenances which might be added to accommodate cargo.
Clearance Lamp. A lamp used on the front and the rear of a motor vehicle to indicate its overall width and height.
Converter Dolly. A motor vehicle consisting of a chassis equipped with one or more axles, a fifth wheel and/or equivalent mechanism, and drawbar, the attachment of which converts a semitrailer to a full trailer.
Curb Weight. The weight of a motor vehicle with standard equipment, maximum capacity of fuel, oil, and coolant; and, if so equipped, air conditioning and additional weight of optional engine. Curb weight does not include the driver.
Dunnage. All loose materials used to support and protect cargo.
Emergency Brake System. A mechanism designed to stop a vehicle after a single failure occurs in the service brake system of a part designed to contain compressed air or brake fluid or vacuum (except failure of a common valve, manifold brake fluid housing or brake chamber housing).
Fifth Wheel. A device mounted on a truck tractor or similar towing vehicle (e.g., converter dolly) which interfaces with and couples to the upper coupler assembly of a semitrailer.
Frame vehicle. A vehicle with skeletal structure fitted with one or more bunk units for transporting logs. A bunk unit consists of U-shaped front and rear bunks that together cradle logs. The bunks are welded, gusseted or otherwise firmly fastened to the vehicle's main beams, and are an integral part of the vehicle.
Fuel Tank Fitting. Any removable device affixed to an opening in the fuel tank with the exception of the filler cap.
Grommet. A device that serves as a support and protection to that which passes through it.
Hazard Warning Signal. Lamps that flash simultaneously to the front and rear, on both the right and left sides of a commercial motor vehicle, to indicate to an approaching driver the presence of a vehicular hazard.
Head Lamps. Lamps used to provide general illumination ahead of a motor vehicle.
Heater. Any device or assembly of devices or appliances used to heat the interior of any motor vehicle. This includes a catalytic heater which must meet the requirements of Section 177.834(1) of the Federal Motor Carrier Safety Administration's hazardous materials regulations when flammable liquid or gas is transported.
Heavy Hauler Trailer. A trailer with one or more of the following characteristics:
(1) Its brake lines are designed to adapt to separation or extension of the vehicle frame; or
(2) Its body consists only of a platform whose primary cargo carrying surface is not more than 40 inches above the ground in an unloaded condition, except that it may include sides that are designed to be easily removable and a permanent "front end structure" as that term is used in Regulation Regulation 38-393.106.
Identification Lamps. Lamps used to identify certain types of commercial motor vehicles.
Lamp. A device used to produce artificial light.
License Plate Lamp. A lamp used to illuminate the license plate on the rear of a motor vehicle.
Longwood. All logs that are not shortwood, i.e., are over 4.9 m (16 feet) long. Such logs are usually described as long logs or treelength.
Low chassis vehicle. (1) A trailer or semitrailer manufactured on or after January 26, 1998, having a chassis which extends behind the rearmost point of the rearmost tires and which has a lower rear surface that meets the guard width, height, and rear surface requirements of the National Highway Traffic Safety Administration's Standard Section 571.224 in effect on the date of manufacture, or a subsequent edition. (2) A motor vehicle, not described by paragraph (1) of this definition, having a chassis which extends behind the rearmost point of the rearmost tires and which has a lower rear surface that meets the guard configuration requirements of State Regulation 38-39386(b)(1).
Parking Brake System. A brake system used to hold a vehicle stationary.
Play. Any free movement of components.
Pulpwood Trailer. A trailer or semitrailer that is designed exclusively for harvesting logs or pulpwood and constructed with a skeletal frame with no means for attachment of a solid bed, body or container.
Rail Vehicle. A vehicle whose skeletal structure is fitted with stakes at the front and rear to contain logs loaded crosswise.
Rear Extremity. The rearmost point on a vehicle when the vehicle's cargo doors, tailgate or other permanent structure are positioned as they normally are when the vehicle is being driven. Non structural protrusions such as tail lights, hinges, and latches are deleted from the determination of the rearmost point.
Reflective Material. A material conforming to Federal Specification L S 300, "Sheeting and Tape, Reflective; Non exposed Lens, Adhesive Backing," (September 7, 1965) meeting the performance standard in either Table 1 or Table 1A of SAE Standard J594f, "Reflex Reflectors" (January, 1977).
Reflex Reflector. A device which is used on a vehicle to give an indication to an approaching driver by reflected lighted from the lamps on the approaching vehicle.
Saddle mount. A device, designed and constructed as to be readily demountable, used in driveaway towaway operations to perform the functions of a conventional fifth wheel:
(1) Upper half. Upper half of a "saddle mount" means that part of the device which is securely attached to the towed vehicle and maintains a fixed position relative thereto, but does not include the "king pin;"
(2) Lower half. Lower half of a "saddle mount" means that part of the device which is securely attached to the towing vehicle and maintains a fixed position relative thereto but does not include the "king pin;" and
(3) King pin. King pin means that device which is used to connect the "upper half" to the "lower half" in such manner as to permit relative movement in a horizontal plane between the towed and towing vehicles.
Service Brake System. A primary brake system used for slowing and stopping a vehicle.
Shortwood. All logs typically up to 4.9 m (16 feet) long. Such logs are often described as cut-up logs, cut-to-length logs, bolts or pulpwood. Shortwood may be loaded lengthwise or crosswise, though that crosswise is usually no more than 2.6 m (102 inches) long.
Side Extremities. The outermost point on the sides of the vehicle. Nonstructural protrusions such as tail lights, hinges, and latches are excluded from the determination of the outermost point.
Side Marker Lamp (Intermediate). A lamp shown to the side of a trailer to indicate the approximate middle of a trailer 30 feet or more in length.
Side Marker Lamps. Lamps used on each side of a trailer to indicate its overall length.
Steering Wheel Lash. The condition in which the steering wheel may be turned through some part of a revolution without associated movement of the front wheels.
Stop Lamps. Lamps shown to the rear of a motor vehicle to indicate that the service brake system is engaged.
Tail Lamps. Lamps used to designate the rear of a motor vehicle.
Tiedown. A combination of securing devices which forms an assembly that attaches articles of cargo to, or restrains articles of cargo on, a vehicle or trailer, and is attached to anchor point(s).
Tractor-pole trailer. A combination vehicle that carries logs lengthwise so that they form the body of the vehicle. The logs are supported by a bunk located on the rear of the tractor, and another bunk on the skeletal trailer. The tractor bunk may rotate about a vertical axis, and the trailer may have a fixed, scoping, or cabled reach, or other mechanical freedom, to allow it to turn.
Turn Signals. Lamps used to indicate a change in direction by emitting a flashing light on the side of a motor vehicle towards which a turn will be made.
Upper Coupler Assembly. A structure consisting of an upper coupler plate, king pin and supporting framework which interfaces with and couples to a fifth wheel.
Upper Coupler Plate. A plate structure through which the king pin neck and collar extend. The bottom surface of the plate contacts the fifth wheel when coupled.
Working load limit (WLL). The maximum load that may be applied to a component of a cargo securement system during normal service, usually assigned by the manufacturer of the component.
