OAR 734-074-0010
Vehicle Combinations Eligible for Permits
(1)
The following vehicle combinations are eligible for permits issued under OAR 734, division 74 as long as they are in compliance with all applicable rules in OAR 734, division 74:(a)
Combinations of vehicles described in ORS Chapter 818 (Vehicle Limits) that meet the requirements of OAR 734-074-0005 (Scope);(b)
Combinations of vehicles described in OAR 734, division 71;(c)
Combinations of vehicles described in OAR 734, division 73;(d)
Combinations of vehicles that include a dromedary truck-tractor having a dromedary box, plate or deck not exceeding 12-feet, 6-inches in length including any load overhang on the dromedary box, plate or deck, provided the overall length does not exceed that authorized by ORS Chapter 818 (Vehicle Limits), OAR 734, division 71 or division 73, whichever is appropriate for the combination of vehicles and the route of travel;(e)
A dromedary truck-tractor having a dromedary box, plate or deck not exceeding 17-feet, 6-inches in length including any load overhang on the dromedary box, plate or deck, towing one stinger-steered semitrailer which is not longer than 53 feet and having an overall length of not more than 75 feet and operating on Group 1 Highways established in OAR 734, division 71;(f)
A laden or unladen combination of vehicles designed and used exclusively to transport overseas marine containers that are enroute to or from a marine port or an intermodal transportation facility. Travel is authorized only on routes indicated in green on Route Map 7, revised April 2016. Route Map 7 is by reference made a part of these rules. The semitrailer may not be longer than 53 feet, and overall length must be 105 feet or less. This combination of vehicles may consist of not more than one truck-tractor, one jeep, one overseas marine container trailer and one booster axle; and(g)
A combination of vehicles commonly known as triples, consisting of a motor truck and two self-supporting trailers, or a truck tractor and semitrailer drawing two self-supporting trailers or semitrailers mounted on dollies equipped with fifthwheels having an overall length not in excess of 105 feet. The self-supporting trailers must be reasonably uniform in length. A motor truck in this combination may not exceed 35 feet in overall length. This combination of vehicles may tow an unladen dolly used to transport a third load carrying semitrailer, provided the combination, including the dolly, does not exceed 85 feet.(2)
The maximum allowable overall lengths for vehicles described in subsections (1)(a) through (c) of this rule are as follows:(a)
For combinations of vehicles described under subsection (1)(a) of this rule, those lengths indicated in ORS Chapter 818 (Vehicle Limits) that comply with OAR 734-074-0005 (Scope);(b)
For combinations of vehicles described under subsection (1)(b) of this rule, those lengths described in OAR 734, division 71; and(c)
For combinations of vehicles described under subsection (1)(c) of this rule, those lengths described in OAR 734, division 73.(3)
A lift or variable load axle(s) may be allowed. The following conditions apply:(a)
The controls for the lift axle may be mounted inside the cab of the power unit provided that it limits the axle movement to the complete up or complete down position;(b)
The control for a variable load, or lift axle, which allows adjustment to increase or decrease loading on the vehicle must not be accessible from the cab;(c)
The lift or variable load axle must be deployed, and distribute the weight of the load, when failure to do so results in any tire, axle, tandem axle or group of axles exceeding the weight limits allowed by OAR 734-074-0020 (Maximum Allowable Weights); and(d)
The lift axle assembly (including axles, tires, brakes) must be adequate to carry the weight of the load.(4)
When the weight difference between any trailer or semitrailer of a triple trailer combination is 1,500 pounds or more, the trailers must be placed from the heaviest to the lightest, with the lightest trailer placed to the rear of the combination.(5)
Triple trailer combinations must have a visible and fully operable method of adjustment to eliminate slack in the hitch mechanism. The device used may be air chamber operated or it may be adjustable by a mechanical cam method.
Source:
Rule 734-074-0010 — Vehicle Combinations Eligible for Permits, https://secure.sos.state.or.us/oard/view.action?ruleNumber=734-074-0010.