Title 49, Part 393 — Parts and Accessories Necessary for Safe Operation

Scope of the rules in this part.

Additional equipment and accessories.

Definitions.

Matter incorporated by reference.

Lamps operable, prohibition of obstructions of lamps and reflectors.

Lamps and reflective devices.

Retroreflective sheeting and reflex reflectors, requirements for semitrailers and trailers manufactured before December 1, 1993.

Lamps and reflectors—combinations in driveaway-towaway operation.

Hazard warning signals.

[Reserved]

Combination of lighting devices and reflectors.

Power supply for lamps.

Requirements for head lamps, auxiliary driving lamps and front fog lamps.

Requirements for lamps other than head lamps.

Requirements for reflectors.

[Reserved]

Wiring systems.

[Reserved]

Battery installation.

§§ 393.31-393.33 [Reserved]

Required brake systems.

Parking brake system.

Brakes required on all wheels.

Breakaway and emergency braking.

Front brake lines, protection.

Brake tubing and hoses; hose assemblies and end fittings.

[Reserved]

Brake actuators, slack adjusters, linings/pads and drums/rotors.

Brakes to be operative.

Control valves for brakes.

Reservoirs required.

Warning signals, air pressure and vacuum gauges.

Brake performance.

Automatic brake adjusters and brake adjustment indicators.

Antilock brake systems.

Glazing in specified openings.

Truck and truck tractor window construction.

Emergency exits for buses.

[Reserved]

All fuel systems.

Liquid fuel tanks.

Compressed natural gas fuel containers.

Liquefied petroleum gas systems.

Coupling devices and towing methods, except for driveaway-towaway operations.

Coupling devices and towing methods, driveaway-towaway operations.

Tires.

Sleeper berths.

Heaters.

Windshield wiping and washing systems.

Windshield defrosting and defogging systems.

Rear-vision mirrors.

Horn.

Speedometer.

Exhaust systems.

Floors.

[Reserved]

Rear impact guards and rear end protection.

Warning flags on projecting loads.

Television receivers.

Buses, driveshaft protection.

Buses, standee line or bar.

Buses, aisle seats prohibited.

[Reserved]

Seats, seat belt assemblies, and seat belt assembly anchorages.

Interior noise levels in power units.

Emergency equipment on all power units.

Applicability and general requirements of cargo securement standards.

Minimum performance criteria for cargo securement devices and systems.

Standards for cargo securement devices and systems.

General requirements for securing articles of cargo.

Determining the working load limit of a tiedown or the load restraining value of a friction mat.

Additional requirements for determining the minimum number of tiedowns.

Adjustability of tiedowns.

Requirements for front end structures used as part of a cargo securement system.

Specific securement requirements for logs.

Specific securement requirements for dressed lumber and similar building products.

Specific securement requirements for metal coils.

Specific securement requirements for paper rolls.

Specific securement requirements for concrete pipe.

Specific securement requirements for intermodal containers.

Specific securement requirements for automobiles, light trucks, and vans.

Specific securement requirements for heavy vehicles, equipment, and machinery.

Specific securement requirements for flattened or crushed vehicles.

Specific securement requirements for roll-on/roll-off and hook lift containers.

Specific securement requirements for large boulders.

Frames.

Cab and body components.

Wheels.

Suspension systems.

Steering wheel systems.