[Code of Federal Regulations] [Title 49, Volume 5] [Revised as of October 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR393.1] [Page 361-362] TITLE 49--TRANSPORTATION DEPARTMENT OF TRANSPORTATION PART 393_PARTS AND ACCESSORIES NECESSARY FOR SAFE OPERATION--Table of Contents Subpart A_General Sec. 393.1 Scope of the rules in this part. Subpart A_General Sec. 393.1 Scope of the rules of this part. 393.3 Additional equipment and accessories. 393.5 Definitions. 393.7 Matter incorporated by reference. Subpart B_Lamps, Reflective Devices, and Electrical Wiring 393.9 Lamps operable, prohibition of obstructions of lamps and reflectors. 393.11 Lamps and reflective devices. 393.13 Retroreflective sheeting and reflex reflectors, requirements for semitrailers and trailers manufactured before December 1, 1993. 393.17 Lamps and reflectors--combinations in driveaway-towaway operation. 393.19 Hazard warning signals. 393.20 [Reserved] 393.22 Combination of lighting devices and reflectors. 393.23 Power supply for lamps. 393.24 Requirements for head lamps, auxiliary driving lamps and front fog lamps. 393.25 Requirements for lamps other than head lamps. 393.26 Requirements for reflex reflectors. 393.27 [Reserved] 393.28 Wiring systems. 393.29 [Reserved] 393.30 Battery installation. 393.31--393.33 [Reserved] Subpart C_Brakes 393.40 Required brake systems. 393.41 Parking brake system. 393.42 Brakes required on all wheels. 393.43 Breakaway and emergency braking. 393.44 Front brake lines, protection. 393.45 Brake tubing and hoses; hose assemblies and end fittings. 393.46 [Reserved] 393.47 Brake actuators, slack adjusters, linings/pads and drums/rotors. 393.48 Brakes to be operative. 393.49 Single valve to operate all brakes. 393.50 Reservoirs required. 393.51 Warning signals, air pressure and vacuum gauges. 393.52 Brake performance. 393.53 Automatic brake adjusters and brake adjustment indicators. 393.55 Antilock brake systems. Subpart D_Glazing and Window Construction 393.60 Glazing in specified openings. 393.61 Truck and truck tractor window construction. 393.62 Emergency exits for buses. 393.63 [Reserved] Subpart E_Fuel Systems 393.65 All fuel systems. 393.67 Liquid fuel tanks. 393.68 Compressed natural gas fuel containers. 393.69 Liquefied petroleum gas systems. Subpart F_Coupling Devices and Towing Methods 393.70 Coupling devices and towing methods, except for driveaway-towaway operations. 393.71 Coupling devices and towing methods, driveaway-towaway operations. Subpart G_Miscellaneous Parts and Accessories 393.75 Tires. 393.76 Sleeper berths. 393.77 Heaters. 393.78 Windshield wiping and washing systems. 393.79 Windshield defrosting and defogging systems. 393.80 Rear-vision mirrors. 393.81 Horn. 393.82 Speedometer. 393.83 Exhaust systems. 393.84 Floors. 393.85 [Reserved] 393.86 Rear impact guards and rear end protection. 393.87 Warning flags on projecting loads. 393.88 Television receivers. 393.89 Buses, driveshaft protection. 393.90 Buses, standee line or bar. 393.91 Buses, aisle seats prohibited. 393.92 [Reserved] 393.93 Seats, seat belt assemblies, and seat belt assembly anchorages. 393.94 Interior noise levels in power units. Subpart H_Emergency Equipment 393.95 Emergency equipment on all power units. Subpart I_Protection Against Shifting and Falling Cargo 393.100 Which types of commercial motor vehicles are subject to the cargo securement standards of this subpart, and what general requirements apply? 393.102 What are the minimum performance criteria for cargo securement devices and systems? 393.104 What standards must cargo securement devices and systems meet in order [[Page 362]] to satisfy the requirements of this subpart? 393.106 What are the general requirements for securing articles of cargo? 393.108 How is the working load limit of a tiedown determined? 393.110 What else do I have to do to determine the minimum number of tiedowns? 393.112 Must a tiedown be adjustable? 393.114 What are the requirements for front end structures used as part of a cargo securement system? Specific Securement Requirements by Commodity Type 393.116 What are the rules for securing logs? 393.118 What are the rules for securing dressed lumber or similar building products? 393.120 What are the rules for securing metal coils? 393.122 What are the rules for securing paper rolls? 393.124 What are the rules for securing concrete pipe? 393.126 What are the rules for securing intermodal containers? 393.128 What are the rules for securing automobiles, light trucks and vans? 393.130 What are the rules for securing heavy vehicles, equipment and machinery? 393.132 What are the rules for securing flattened or crushed vehicles? 393.134 What are the rules for securing roll-on/roll-off and hook lift containers? 393.136 What are the rules for securing large boulders? Subpart J_Frames, Cab and Body Components, Wheels, Steering, and Suspension Systems 393.201 Frames. 393.203 Cab and body components. 393.205 Wheels. 393.207 Suspension systems. 393.209 Steering wheel systems. Authority: 49 U.S.C. 322, 31136, and 31502; Section 1041(b) of Pub. L. 102-240, 105 Stat. 1914, 1993 (1991); and 49 CFR 1.73. Source: 33 FR 19735, Dec. 25, 1968, unless otherwise noted. Editorial Note: Nomenclature changes to part 393 appear at 66 FR 49874, Oct. 1, 2001. Source: 53 FR 49384, Dec. 7, 1988, unless otherwise noted. (a) The rules in this part establish minimum standards for commercial motor vehicles as defined in Sec. 390.5 of this title. Only motor vehicles (as defined in Sec. 390.5) and combinations of motor vehicles which meet the definition of a commercial motor vehicle are subject to the requirements of this part. All requirements that refer to motor vehicles with a GVWR below 4,536 kg (10,001 pounds) are applicable only when the motor vehicle or combination of motor vehicles meets the definition of a commercial motor vehicle. (b) Every employer and employee shall comply and be conversant with the requirements and specifications of this part. No employer shall operate a commercial motor vehicle, or cause or permit it to be operated, unless it is equipped in accordance with the requirements and specifications of this part. [70 FR 48025, Aug. 15, 2005]