Washington OSOW Regulations
Official guide to Washington oversize load transport regulations. Find legal dimensions, overweight permit limits, and superload engineering requirements.
Legal Dimensions (No Permit)
Max Width
8'6" (8' on local roads)
Max Height
14'
Max Length
Varies
Max Weight
80,000 lbs maximum (105,500 lbs maximum legal weight allowed)
Always verify limitations with the official state permit office. Regulations are subject to change without notice.
Permit Office
Need a Permit or Route Survey?
Our engineering team handles all overweight load permits, physical route surveys, and superload applications for Washington.
Request Logistics Quote
