As of May 6, 2022Chapter III, Subchapter B — Federal Motor Carrier Safety Regulations
Part 393 Parts and Accessories Necessary for Safe Operation
90 sections · What changed since this date
Subpart A—General
Subpart B—Lamps, Reflective Devices, and Electrical Wiring
- § 393.9Lamps operable, prohibition of obstructions of lamps and reflectors.2 versions
- § 393.11Lamps and reflective devices.11 versions
- § 393.13Retroreflective sheeting and reflex reflectors, requirements for semitrailers and trailers manufactured before December 1, 1993.3 versions
- § 393.17Lamps and reflectors—combinations in driveaway-towaway operation.4 versions
- § 393.19Hazard warning signals.2 versions
- § 393.20[Reserved]2 versions
- § 393.22Combination of lighting devices and reflectors.
- § 393.23Power supply for lamps.2 versions
- § 393.24Requirements for head lamps, auxiliary driving lamps and front fog lamps.2 versions
- § 393.25Requirements for lamps other than head lamps.2 versions
- § 393.26Requirements for reflectors.2 versions
- § 393.27[Reserved]2 versions
- § 393.28Wiring systems.2 versions
- § 393.29[Reserved]2 versions
- § 393.30Battery installation.
- § 393.31-393.33[Reserved]
Subpart C—Brakes
- § 393.40Required brake systems.4 versions
- § 393.41Parking brake system.2 versions
- § 393.42Brakes required on all wheels.6 versions
- § 393.43Breakaway and emergency braking.2 versions
- § 393.44Front brake lines, protection.
- § 393.45Brake tubing and hoses; hose assemblies and end fittings.3 versions
- § 393.46[Reserved]2 versions
- § 393.47Brake actuators, slack adjusters, linings/pads and drums/rotors.7 versions
- § 393.48Brakes to be operative.4 versions
- § 393.49Control valves for brakes.3 versions
- § 393.50Reservoirs required.2 versions
- § 393.51Warning signals, air pressure and vacuum gauges.2 versions
- § 393.52Brake performance.6 versions
- § 393.53Automatic brake adjusters and brake adjustment indicators.2 versions
- § 393.55Antilock brake systems.3 versions
Subpart D - Glazing and Window Construction
- § 393.60Glazing in specified openings. manufactured on or after December 25, 1968, shall at a minimum meet the requirements of Federal Motor Vehicle Safety Standard (FMVSS) No. 205 in effect on the date of manufacture of the motor vehicle. The glazing material shall be marked in accordance with FMVSS No. 205 (49 CFR 571.205, S6).9 versions
- § 393.61Truck and truck tractor window construction.2 versions
- § 393.62Emergency exits for buses.2 versions
- § 393.63[Reserved]2 versions
Subpart E—Fuel Systems
Subpart F—Coupling Devices and Towing Methods
Subpart G—Miscellaneous Parts and Accessories
- § 393.75Tires.9 versions
- § 393.76Sleeper berths.
- § 393.77Heaters.4 versions
- § 393.78Windshield wiping and washing systems.2 versions
- § 393.79Windshield defrosting and defogging systems.2 versions
- § 393.80Rear-vision mirrors.3 versions
- § 393.81Horn.2 versions
- § 393.82Speedometer.2 versions
- § 393.83Exhaust systems.
- § 393.84Floors.
- § 393.85[Reserved]
- § 393.86Rear impact guards and rear end protection.8 versions
- § 393.87Warning flags on projecting loads.2 versions
- § 393.88Television receivers.
- § 393.89Buses, driveshaft protection.
- § 393.90Buses, standee line or bar.2 versions
- § 393.91Buses, aisle seats prohibited.
- § 393.92[Reserved]2 versions
- § 393.93Seats, seat belt assemblies, and seat belt assembly anchorages.2 versions
- § 393.94Interior noise levels in power units.3 versions
Subpart H—Emergency Equipment
Subpart I—Protection Against Shifting and Falling Cargo
- § 393.100Which types of commercial motor vehicles are subject to the cargo securement standards of this subpart, and what general requirements apply?3 versions
- § 393.102What are the minimum performance criteria for cargo securement devices and systems?7 versions
- § 393.104What standards must cargo securement devices and systems meet in order to satisfy the requirements of this subpart?5 versions
- § 393.106What are the general requirements for securing articles of cargo?4 versions
- § 393.108How is the working load limit of a tiedown, or the load restraining value of a friction mat, determined?4 versions
- § 393.110What else do I have to do to determine the minimum number of tiedowns?3 versions
- § 393.112Must a tiedown be adjustable?2 versions
- § 393.114What are the requirements for front end structures used as part of a cargo securement system?3 versions
- Specific Securement Requirements by Commodity Type§ 393.116What are the rules for securing logs?3 versions
- § 393.118What are the rules for securing dressed lumber or similar building products?5 versions
- § 393.120What are the rules for securing metal coils?3 versions
- § 393.122What are the rules for securing paper rolls?3 versions
- § 393.124What are the rules for securing concrete pipe?6 versions
- § 393.126What are the rules for securing intermodal containers?3 versions
- § 393.128What are the rules for securing automobiles, light trucks and vans?2 versions
- § 393.130What are the rules for securing heavy vehicles, equipment and machinery?2 versions
- § 393.132What are the rules for securing flattened or crushed vehicles?3 versions
- § 393.134What are the rules for securing roll-on/roll-off or hook lift containers?2 versions
- § 393.136What are the rules for securing large boulders?3 versions