Chapter 38

38-393.112. Must a tiedown be adjustable? Each tiedown, or its associated connectors, or its attachment mechanisms must be designed, constructed, and maintained so the driver of an in-transit commercial motor vehicle can tighten them. However, this requirement does not apply to t…

38-393.114. (b) Preparation of equipment being transported. (1) Accessory equipment, such as hydraulic shovels, must be completely lowered and secured to the vehicle. (2) Articulated vehicles shall be restrained in a manner that prevents articulation while in transit. (c) Securem…

38-393.116. What are the rules for securing logs? (a) Applicability. The rules are applicable to the transportation of logs with the following excep- tions: (1) Logs that are unitized by banding or other comparable means may be transported in accordance with the general cargo sec…

38-393.118. What are the rules for securing dressed lumber or similar building prod- ucts? (a) Applicability. The rules apply to the transportation of bundles of dressed lumber, packaged lumber, building products such as plywood, gypsum board or other materials of similar shape. …

38-393.128. What are the rules for securing automobiles, light trucks and vans? (a) Applicability. The rules apply to the transportation of automobiles, light trucks, and vans which individually weigh 4,536 kg. (10,000 lb) or less. Vehicles which individually are heavier than 4,5…

38-393.13. Retroreflective sheeting and reflex reflectors, requirements for semitrailers and trailers manufactured before December 1, 1993. (a) Applicability. All trailers and semitrailers manufactured prior to December 1, 1993, which have an overall width of 2,032 mm (80 inches)…

38-393.130. What are the rules for securing heavy vehicles, equipment and machinery? (a) Applicability. The rules apply to the transportation of heavy vehicles, equipment and machinery which operate on wheels or tracks, such as front end loaders, bulldozers, tractors, and power s…

38-393.17. Lamps and reflectors - combinations in driveaway-towaway operation.

38-393.19. Requirements for turn signaling systems. (a) Every truck, or truck tractor shall be equipped with a signaling system that in addition to signaling turning movements shall have a switch or combination of switches that will cause the two front turn signals and the two re…

38-393.20. Clearance lamps to indicate extreme width and height. Clearance lamps shall be mounted so as to indicate the extreme width of the motor vehicle (not including mirrors) and as near the top thereof as practicable: Provided, That when rear identification lamps are mounted…

38-393.201. Frames.

38-393.203. Cab and body components. (a) The cab compartment doors or door parts used as an entrance or exist shall not be missing or broken. Doors shall not sag so that they cannot be properly opened or closed. No door shall be wired shut or otherwise secured in the closed posit…

38-393.205. Wheels. (a) Wheels and rims shall not be cracked or broken. (b) Stud or bolt holes on the wheels shall not be elongated (out of round). (c) Nuts or bolts shall not be missing or loose. HISTORY: Amended by State Register Volume 30, Issue No. 4, eff April 28, 2006.

38-393.207. Suspension systems. (a) Axles. No axle positioning part shall be cracked, broken, loose or missing. All axles must be in proper alignment. (b) Adjustable axles. Adjustable axle assemblies shall not have locking pins missing or disengaged. (c) Leaf springs. No leaf spr…

38-393.209. Steering wheel systems. (a) The steering wheel shall be secured and must not have any spokes cracked through or missing. (b) The steering wheel lash shall not exceed the following parameters: Steering wheel diameter Manual steering system Power steering system 16 9 or…

38-393.22. Combination of lighting devices and reflectors. (a) Permitted combinations. Except as provided in paragraph (b), two or more lighting devices and reflectors (whether or not required by the rules in 38-382) may be combined optically if (1) Each required lighting device …

38-393.23. Lighting devices to be electric. Lighting devices shall be electric, except that red liquid burning lanterns may be used on the end of loads in the nature of poles, pipes, and ladders projecting to the rear of the motor vehicle. HISTORY: Amended by State Register Volum…

38-393.24. Requirements for head lamps and auxiliary road lighting lamps. (a) Mounting. Head lamps and auxiliary road lighting lamps shall be mounted so that the beams are readily adjustable, both vertically and horizontally, and the mounting shall be such that the aim is not rea…

38-393.25. Requirements for lamps other than head lamps. (a) Mounting. All lamps shall be permanently and securely mounted in workmanlike manner on a permanent part of the motor vehicle, except that temporary lamps on motor vehicles being transport- ed in driveaway towaway operat…

38-393.26. Requirements for reflectors. (a) Mounting. All required reflectors shall be mounted upon the motor vehicle at a height not less than 15 inches nor more than 60 inches above the ground on which the motor vehicle stands, except that reflectors shall be mounted as high as…

38-393.27. Wiring specifications. (a) Wiring for both low voltage (tension) and high voltage (tension) circuits shall be constructed and installed so as to meet design requirements. Wiring shall meet or exceed, both mechanically and electrically, the following SAE Standards as fo…

38-393.28. Wiring to be protected. (a) The wiring shall (1) Be so installed that connections are protected from weather, abrasion, road splash, grease, oil, fuel and chafing; (2) Be grouped together, when possible, and protected by nonconductive tape, braid, or other covering cap…

38-393.29. Grounds. The battery ground and trailer return ground connections on a grounded system shall be readily accessible. The contact surfaces of electrical connections shall be clean and free of oxide, paint, or other nonconductive coating. HISTORY: Amended by State Registe…

38-393.3. Additional equipment and accessories. Nothing contained in this regulation shall be construed to prohibit the use of additional equipment and accessories, not inconsistent with or prohibited by this regulation, provided such equipment and accessories do not decrease the…

38-393.30. Battery installation. Every storage battery on every vehicle, unless located in the engine compartment, shall be covered by a fixed part of the motor vehicle or protected by a removable cover or enclosure. Removable covers or enclosures shall be substantial and shall b…

38-393.31. Overload protective devices. (a) The current to all low tension circuits shall pass through overload protective devices except that this requirement shall not be applicable to battery to starting motor or battery to generator circuits, ignition and engine control circu…

38-393.32. Detachable electrical connections. Electrical wiring between towing and towed vehicles shall be contained in a cable or cables or entirely within another substantially constructed protective device. All such electrical wiring shall be mechani- cally and electrically ad…

38-393.33. Wiring, installation. Electrical wiring shall be systematically arranged and installed in a workmanlike manner. All detachable wiring, except temporary wiring connections for driveaway towaway operations, shall be attached to posts or terminals by means of suitable cab…

38-393.40. Required brake systems.

38-393.41. Parking brake system. (a) Every commercial motor vehicle manufactured on and after March 7, 1990, except an agricultur- al commodity trailer, converter dolly, heavy hauler or pulpwood trailer, shall at all times be equipped with a parking brake system adequate to hold …

38-393.42. Brakes required on all wheels. (a) Every commercial motor vehicle shall be equipped with brakes acting on all wheels. (b) Exception. (1) Trucks or truck tractors having three or more axles (i) Need not have brakes on the front wheels if the vehicle was manufactured bef…

38-393.43. Breakaway and emergency braking. (a) Every motor vehicle, if used to tow a trailer equipped with brakes, shall be equipped with means for providing that in case of breakaway of such trailer the service brakes on the towing vehicle will be sufficiently operative to stop…

38-393.44. 38-393 shall not be applicable to driveaway towaway operations unless the brakes on such operations are designed to be operated by a single valve. HISTORY: Amended by State Register Volume 30, Issue No. 4, eff April 28, 2006.

38-393.45. Brake tubing and hose, adequacy. (a) General requirements. Brake tubing and brake hose must (1) Be designed and constructed in a manner that insures proper, adequate, and continued functioning of the tubing or hose; (2) Be installed in a manner that insures proper cont…

38-393.46. Brake tubing and hose connections. All connections for air, vacuum, or hydraulic braking systems shall: (a) Be adequate in material and construction to insure proper continued functioning; (b) Be designed, constructed, and installed so as to insure, when properly conne…

38-393.47. Brake lining. The brake lining on every motor vehicle shall be so constructed and installed as not to be subject to excessive fading and grabbing and shall be adequate in thickness, means of attachment, and physical characteristics to provide for safe and reliable stop…

38-393.48. Brakes to be operative. (a) General rule. Except as provided in paragraphs (b) and (c), all brakes with which a motor vehicle is equipped must at all times be capable of operating. (b) Devices to reduce or remove front wheel braking effort. A motor vehicle may be equip…

38-393.49. Single valve to operate all brakes. Every motor vehicle, the date of manufacture of which is subsequent to June 30, 1953, which is equipped with power brakes, shall have the braking system so arranged that one application valve shall when applied operate all the servic…

38-393.5. Definitions. As used in 38-382, the following words and terms are construed to mean: Aggregate working load limit. The summation of the working load limits or restraining capacity of all devices used to secure an article of cargo on a vehicle. Anchor Point. Part of the …

38-393.50. Reservoirs required. (a) General. Every commercial motor vehicle using air or vacuum for breaking shall be equipped with reserve capacity or a reservoir sufficient to ensure a full service brake application with the engine stopped without depleting the air pressure or …

38-393.51. Warning devices and gauges. (a) General. In the manner and to the extent specified in paragraphs (b), (c), (d), and (e), a truck, or truck tractor must be equipped with a signal that provides a warning to the driver when a failure occurs in the vehicle’s service brake …

38-393.52. Brake performance. (a) Upon application of its service brakes, a motor vehicle or combination of motor vehicles must under any condition of loading in which it is found on a public highway, be capable of (1) Developing a braking force at least equal to the percentage o…

38-393.53. Automatic brake adjusters and brake adjustment indicators. (a) Automatic brake adjusters (hydraulic brake systems). Each commercial motor vehicle manufac- tured on or after October 20, 1993, and equipped with a hydraulic brake system, shall meet the automatic brake adj…

38-393.60. Glazing in specified openings.

38-393.61. Window construction.

38-393.62. Window obstructions. Windows, if otherwise capable of complying with Regulation 38-393.61 (a) and (b), shall not be obstructed by bars or other such means located either inside or outside such windows such as would hinder the escape of occupants unless such bars or oth…

38-393.65. All fuel systems.

38-393.67. Liquid fuel tanks. (a) Application of the rules. (1) A liquid fuel tank manufactured on or after January 1, 1973, and a side mounted gasoline tank must conform to all the rules. (2) [Reserved] (3) A diesel fuel tank manufactured before January 1, 1973, and mounted on a…

38-393.69. Liquefied petroleum gas systems. Subpart F: Coupling Devices and Towing Methods

38-393.7. Matter incorporated by reference. (a) Incorporation by reference. Part 38-393 includes references to certain matter or materials. The text of the materials is not included in the regulations contained in part 38-393. The materials are hereby made a part of the regulatio…