Title 49

PART 393

Part 393 - Parts And Accessories Necessary For Safe Operation

PART 393 - PARTS AND ACCESSORIES NECESSARY FOR SAFE OPERATION Authority:49 U.S.C. 31136, 31151, and 31502; sec. 1041(b) of Pub. L. 102-240, 105 Stat. 1914, 1993 (1991); sec. 5301 and 5524 of Pub. L. 114-94, 129 Stat. 1312, 1543, 1560; and 49 CFR 1.87. 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.

49:5.1.1.2.36.1SUBPART A
Subpart A - General
49:5.1.1.2.36.1.16.1SECTION 393.1
   393.1 Scope of the rules in this part.
49:5.1.1.2.36.1.16.2SECTION 393.3
   393.3 Additional equipment and accessories.
49:5.1.1.2.36.1.16.3SECTION 393.5
   393.5 Definitions.
49:5.1.1.2.36.1.16.4SECTION 393.7
   393.7 Matter incorporated by reference.
49:5.1.1.2.36.2SUBPART B
Subpart B - Lamps, Reflective Devices, and Electrical Wiring
49:5.1.1.2.36.2.16.1SECTION 393.9
   393.9 Lamps operable, prohibition of obstructions of lamps and reflectors.
49:5.1.1.2.36.2.16.2SECTION 393.11
   393.11 Lamps and reflective devices.
49:5.1.1.2.36.2.16.3SECTION 393.13
   393.13 Retroreflective sheeting and reflex reflectors, requirements for semitrailers and trailers manufactured before December 1, 1993.
49:5.1.1.2.36.2.16.4SECTION 393.17
   393.17 Lamps and reflectors - combinations in driveaway-towaway operation.
49:5.1.1.2.36.2.16.5SECTION 393.19
   393.19 Hazard warning signals.
49:5.1.1.2.36.2.16.6SECTION 393.20
   393.20 [Reserved]
49:5.1.1.2.36.2.16.7SECTION 393.22
   393.22 Combination of lighting devices and reflectors.
49:5.1.1.2.36.2.16.8SECTION 393.23
   393.23 Power supply for lamps.
49:5.1.1.2.36.2.16.9SECTION 393.24
   393.24 Requirements for head lamps, auxiliary driving lamps and front fog lamps.
49:5.1.1.2.36.2.16.10SECTION 393.25
   393.25 Requirements for lamps other than head lamps.
49:5.1.1.2.36.2.16.11SECTION 393.26
   393.26 Requirements for reflectors.
49:5.1.1.2.36.2.16.12SECTION 393.27
   393.27 [Reserved]
49:5.1.1.2.36.2.16.13SECTION 393.28
   393.28 Wiring systems.
49:5.1.1.2.36.2.16.14SECTION 393.29
   393.29 [Reserved]
49:5.1.1.2.36.2.16.15SECTION 393.30
   393.30 Battery installation.
49:5.1.1.2.36.2.16.16SECTION 393.31-393.33
   393.31-393.33 [Reserved]
49:5.1.1.2.36.3SUBPART C
Subpart C - Brakes
49:5.1.1.2.36.3.16.1SECTION 393.40
   393.40 Required brake systems.
49:5.1.1.2.36.3.16.2SECTION 393.41
   393.41 Parking brake system.
49:5.1.1.2.36.3.16.3SECTION 393.42
   393.42 Brakes required on all wheels.
49:5.1.1.2.36.3.16.4SECTION 393.43
   393.43 Breakaway and emergency braking.
49:5.1.1.2.36.3.16.5SECTION 393.44
   393.44 Front brake lines, protection.
49:5.1.1.2.36.3.16.6SECTION 393.45
   393.45 Brake tubing and hoses; hose assemblies and end fittings.
49:5.1.1.2.36.3.16.7SECTION 393.46
   393.46 [Reserved]
49:5.1.1.2.36.3.16.8SECTION 393.47
   393.47 Brake actuators, slack adjusters, linings/pads and drums/rotors.
49:5.1.1.2.36.3.16.9SECTION 393.48
   393.48 Brakes to be operative.
49:5.1.1.2.36.3.16.10SECTION 393.49
   393.49 Control valves for brakes.
49:5.1.1.2.36.3.16.11SECTION 393.50
   393.50 Reservoirs required.
49:5.1.1.2.36.3.16.12SECTION 393.51
   393.51 Warning signals, air pressure and vacuum gauges.
49:5.1.1.2.36.3.16.13SECTION 393.52
   393.52 Brake performance.
49:5.1.1.2.36.3.16.14SECTION 393.53
   393.53 Automatic brake adjusters and brake adjustment indicators.
49:5.1.1.2.36.3.16.15SECTION 393.55
   393.55 Antilock brake systems.
49:5.1.1.2.36.4SUBPART D
Subpart D - Glazing and Window Construction
49:5.1.1.2.36.4.16.1SECTION 393.60
   393.60 Glazing in specified openings.
49:5.1.1.2.36.4.16.2SECTION 393.61
   393.61 Truck and truck tractor window construction.
49:5.1.1.2.36.4.16.3SECTION 393.62
   393.62 Emergency exits for buses.
49:5.1.1.2.36.4.16.4SECTION 393.63
   393.63 [Reserved]
49:5.1.1.2.36.5SUBPART E
Subpart E - Fuel Systems
49:5.1.1.2.36.5.16.1SECTION 393.65
   393.65 All fuel systems.
49:5.1.1.2.36.5.16.2SECTION 393.67
   393.67 Liquid fuel tanks.
49:5.1.1.2.36.5.16.3SECTION 393.68
   393.68 Compressed natural gas fuel containers.
49:5.1.1.2.36.5.16.4SECTION 393.69
   393.69 Liquefied petroleum gas systems.
49:5.1.1.2.36.6SUBPART F
Subpart F - Coupling Devices and Towing Methods
49:5.1.1.2.36.6.16.1SECTION 393.70
   393.70 Coupling devices and towing methods, except for driveaway-towaway operations.
49:5.1.1.2.36.6.16.2SECTION 393.71
   393.71 Coupling devices and towing methods, driveaway-towaway operations.
49:5.1.1.2.36.7SUBPART G
Subpart G - Miscellaneous Parts and Accessories
49:5.1.1.2.36.7.16.1SECTION 393.75
   393.75 Tires.
49:5.1.1.2.36.7.16.2SECTION 393.76
   393.76 Sleeper berths.
49:5.1.1.2.36.7.16.3SECTION 393.77
   393.77 Heaters.
49:5.1.1.2.36.7.16.4SECTION 393.78
   393.78 Windshield wiping and washing systems.
49:5.1.1.2.36.7.16.5SECTION 393.79
   393.79 Windshield defrosting and defogging systems.
49:5.1.1.2.36.7.16.6SECTION 393.80
   393.80 Rear-vision mirrors.
49:5.1.1.2.36.7.16.7SECTION 393.81
   393.81 Horn.
49:5.1.1.2.36.7.16.8SECTION 393.82
   393.82 Speedometer.
49:5.1.1.2.36.7.16.9SECTION 393.83
   393.83 Exhaust systems.
49:5.1.1.2.36.7.16.10SECTION 393.84
   393.84 Floors.
49:5.1.1.2.36.7.16.11SECTION 393.85
   393.85 [Reserved]
49:5.1.1.2.36.7.16.12SECTION 393.86
   393.86 Rear impact guards and rear end protection.
49:5.1.1.2.36.7.16.13SECTION 393.87
   393.87 Warning flags on projecting loads.
49:5.1.1.2.36.7.16.14SECTION 393.88
   393.88 Television receivers.
49:5.1.1.2.36.7.16.15SECTION 393.89
   393.89 Buses, driveshaft protection.
49:5.1.1.2.36.7.16.16SECTION 393.90
   393.90 Buses, standee line or bar.
49:5.1.1.2.36.7.16.17SECTION 393.91
   393.91 Buses, aisle seats prohibited.
49:5.1.1.2.36.7.16.18SECTION 393.92
   393.92 [Reserved]
49:5.1.1.2.36.7.16.19SECTION 393.93
   393.93 Seats, seat belt assemblies, and seat belt assembly anchorages.
49:5.1.1.2.36.7.16.20SECTION 393.94
   393.94 Interior noise levels in power units.
49:5.1.1.2.36.8SUBPART H
Subpart H - Emergency Equipment
49:5.1.1.2.36.8.16.1SECTION 393.95
   393.95 Emergency equipment on all power units.
49:5.1.1.2.36.9SUBPART I
Subpart I - Protection Against Shifting and Falling Cargo
49:5.1.1.2.36.9.16SUBJGRP 16
   Specific Securement Requirements by Commodity Type
49:5.1.1.2.36.9.16.1SECTION 393.100
   393.100 Which types of commercial motor vehicles are subject to the cargo securement standards of this subpart, and what general requirements apply
49:5.1.1.2.36.9.16.2SECTION 393.102
   393.102 What are the minimum performance criteria for cargo securement devices and systems
49:5.1.1.2.36.9.16.3SECTION 393.104
   393.104 What standards must cargo securement devices and systems meet in order to satisfy the requirements of this subpart
49:5.1.1.2.36.9.16.4SECTION 393.106
   393.106 What are the general requirements for securing articles of cargo
49:5.1.1.2.36.9.16.5SECTION 393.108
   393.108 How is the working load limit of a tiedown, or the load restraining value of a friction mat, determined
49:5.1.1.2.36.9.16.6SECTION 393.110
   393.110 What else do I have to do to determine the minimum number of tiedowns
49:5.1.1.2.36.9.16.7SECTION 393.112
   393.112 Must a tiedown be adjustable
49:5.1.1.2.36.9.16.8SECTION 393.114
   393.114 What are the requirements for front end structures used as part of a cargo securement system
49:5.1.1.2.36.9.16.9SECTION 393.116
   393.116 What are the rules for securing logs
49:5.1.1.2.36.9.16.10SECTION 393.118
   393.118 What are the rules for securing dressed lumber or similar building products
49:5.1.1.2.36.9.16.11SECTION 393.120
   393.120 What are the rules for securing metal coils
49:5.1.1.2.36.9.16.12SECTION 393.122
   393.122 What are the rules for securing paper rolls
49:5.1.1.2.36.9.16.13SECTION 393.124
   393.124 What are the rules for securing concrete pipe
49:5.1.1.2.36.9.16.14SECTION 393.126
   393.126 What are the rules for securing intermodal containers
49:5.1.1.2.36.9.16.15SECTION 393.128
   393.128 What are the rules for securing automobiles, light trucks and vans
49:5.1.1.2.36.9.16.16SECTION 393.130
   393.130 What are the rules for securing heavy vehicles, equipment and machinery
49:5.1.1.2.36.9.16.17SECTION 393.132
   393.132 What are the rules for securing flattened or crushed vehicles
49:5.1.1.2.36.9.16.18SECTION 393.134
   393.134 What are the rules for securing roll-on/roll-off or hook lift containers
49:5.1.1.2.36.9.16.19SECTION 393.136
   393.136 What are the rules for securing large boulders
49:5.1.1.2.36.10SUBPART J
Subpart J - Frames, Cab and Body Components, Wheels, Steering, and Suspension Systems
49:5.1.1.2.36.10.17.1SECTION 393.201
   393.201 Frames.
49:5.1.1.2.36.10.17.2SECTION 393.203
   393.203 Cab and body components.
49:5.1.1.2.36.10.17.3SECTION 393.205
   393.205 Wheels.
49:5.1.1.2.36.10.17.4SECTION 393.207
   393.207 Suspension systems.
49:5.1.1.2.36.10.17.5SECTION 393.209
   393.209 Steering wheel systems.