OAR 734-082-0030
Overhang
(1)
Permits are required for excessive front and/or rear overhang as follows:(a)
Front overhang: When any load, including crane booms, log grapples, conveyors, cement chutes, loading buckets, etc., extends more than four feet beyond the front bumper or foremost part of the vehicle or combination of vehicles;(b)
Rear overhang — Solo vehicle: Single trip or continuous trip If the rear overhang exceeds 3⁄4 of the wheelbase of the vehicle. A permit may be issued allowing a maximum rear overhang equal to the wheelbase of the vehicle provided front overhang does not exceed four feet;(c)
Rear overhang — Combination of vehicles. If rear overhang exceeds 1⁄3 of the wheelbase of the combination of vehicles, a single trip permit may be issued for a rear overhang not to exceed 1⁄2 of the wheelbase of the combination of vehicles, except that:(A)
Continuous trip permits for truck-tractor with semitrailer combinations may be issued for rear overhang not to exceed 1⁄2 of the wheelbase of the combination of vehicles for designated routes when a permit is issued for load length not in excess of 70 feet and overall length is not in excess of 80 feet, and when movement is on routes approved for these permits by the Chief Engineer; or(B)
Continuous trip permits may be issued for rear overhang that exceeds the limits imposed in this subsection if the Administrator of CCD determines that the public interest requires the impending movement, and the movement can be performed safely.(2)
Wheelbase measurement will be from the center of the first axle to the center of the last axle of the vehicle or combination of vehicles.(3)
Rear overhang will be measured from the center of the last axle of the vehicle or combination of vehicles to the end of the load.
Source:
Rule 734-082-0030 — Overhang, https://secure.sos.state.or.us/oard/view.action?ruleNumber=734-082-0030.