2011 ORS § 801.390¹
Pole trailer

Pole trailer means a trailer attached or secured to the towing vehicle and ordinarily used for transporting long or irregular loads capable generally of sustaining themselves as beams between the towing vehicle and the trailer. The definition in this section is based on design features and, except as otherwise provided in this section, does not prohibit a pole trailer from fitting into another category of trailer based on use. [1983 c.338 §70]