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  • § 393.1
    Scope of the rules in this part.
  • § 393.3
    Additional equipment and accessories.
  • § 393.5
    Definitions.
  • § 393.7
    Matter incorporated by reference.
  • § 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
  • § 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 reflectors.
  • § 393.27
  • § 393.28
    Wiring systems.
  • § 393.29
  • § 393.30
    Battery installation.
  • §§ 393.31-393.33
  • § 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
  • § 393.47
    Brake actuators, slack adjusters, linings/pads and drums/rotors.
  • § 393.48
    Brakes to be operative.
  • § 393.49
    Control valves for 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.
  • § 393.60
    Glazing in specified openings.
  • § 393.61
    Truck and truck tractor window construction.
  • § 393.62
    Emergency exits for buses.
  • § 393.63
  • § 393.65
    All fuel systems.
  • § 393.67
    Liquid fuel tanks.
  • § 393.68
    Compressed natural gas fuel containers.
  • § 393.69
    Liquefied petroleum gas systems.
  • § 393.70
    Coupling devices and towing methods, except for driveaway-towaway operations.
  • § 393.71
    Coupling devices and towing methods, driveaway-towaway operations.
  • § 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
  • § 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
  • § 393.93
    Seats, seat belt assemblies, and seat belt assembly anchorages.
  • § 393.94
    Interior noise levels in power units.
  • § 393.95
    Emergency equipment on all power units.
  • § 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 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, or the load restraining value of a friction mat, 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?
  • § 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 or hook lift containers?
  • § 393.136
    What are the rules for securing large boulders?
  • § 393.201
    Frames.
  • § 393.203
    Cab and body components.
  • § 393.205
    Wheels.
  • § 393.207
    Suspension systems.
  • § 393.209

    Steering wheel systems.

Part 393
PARTS AND ACCESSORIES NECESSARY FOR SAFE OPERATION

§ 393.102: What are the minimum performance criteria for cargo securement devices and systems?

(a) Performance criteria—(1) Breaking strength. Tiedown assemblies (including chains, wire rope, steel strapping, synthetic webbing, and cordage) and other attachment or fastening devices used to secure articles of cargo to, or in, commercial motor vehicles must be designed, installed, and maintained to ensure that the maximum forces acting on the devices or systems do not exceed the manufacturer's breaking strength rating under the following conditions, applied separately:
(i) 0.8 g deceleration in the forward direction;
(ii) 0.5 g acceleration in the rearward direction; and
(iii) 0.5 g acceleration in a lateral direction.
(2) Working Load limit. Tiedown assemblies (including chains, wire rope, steel strapping, synthetic webbing, and cordage) and other attachment or fastening devices used to secure articles of cargo to, or in, commercial motor vehicles must be designed, installed, and maintained to ensure that the forces acting on the devices or systems do not exceed the working load limit for the devices under the following conditions, applied separately:
(i) 0.435 g deceleration in the forward direction;
(ii) 0.5 g acceleration in the rearward direction; and
(iii) 0.25 g acceleration in a lateral direction.
(b) Performance criteria for devices to prevent vertical movement of loads that are not contained within the structure of the vehicle. Securement systems must provide a downward force equivalent to at least 20 percent of the weight of the article of cargo if the article is not fully contained within the structure of the vehicle. If the article is fully contained within the structure of the vehicle, it may be secured in accordance with § 393.106(b).
(c) Equivalent means of securement. The means of securing articles of cargo are considered to meet the performance requirements of this section if the cargo is:
(1) Immobilized, such so that it cannot shift or tip to the extent that the vehicle's stability or maneuverability is adversely affected; or
(2) Transported in a sided vehicle that has walls of adequate strength, such that each article of cargo within the vehicle is in contact with, or sufficiently close to a wall or other articles, so that it cannot shift or tip to the extent that the vehicle's stability or maneuverability is adversely affected; or
(3) Secured in accordance with the applicable requirements of §§ 393.104 through 393.136.

Citation: [71 FR 35832, June 22, 2006, as amended at 78 FR 58484, Sept. 24, 2013]