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Dimension | National Network | State and Other Supplemental Highways |
Width: | 8' 6" | 8' 6" |
Height: | 14' | 14' |
Length: | National Network | State and Other Supplemental Highways |
Bus | ||
Articulated bus | ||
Straight Trucks | 40' | 40' |
Straight truck and trailer | 60' | 60' |
Tractor-semitrailer combinations | No limit with legal trailer | 60' 53' trailer on a Group 1 highway, or 40' trailer on a Group 2 highway |
Semitrailer | 53' | 53' on a Group 1 highway, 40' trailer on a Group 2 highway |
Tractor-twin-trailer combination | No limit with legal trailer limit | 75' on a Group 1 highway, 65' on a Group 2, and 60' on a Group 3 highway |
Trailers of twin-trailer combinations | 40' both trailing units together measured from the front of the 1st trailer to the rear of the 2nd trailer may not exceed 68' | Total length restricted |
Boat-transporter combination | 65' May exceed 65' provided the semitrailer does not exceed 53' | NS |
Overhang limitations | 4' front, 5' rear | |
Stinger-steered boat-transporter | ||
Overhang limitations | ||
Auto-transporter | 65' May exceed 65' provided the semitrailer does not exceed 53' | NS |
Overhang limitations | 4' front, 5' rear | NS |
Stinger-steered auto-transporter | 75' 45' trailer | NS |
Overhang limitations | 4' front, 5' rear | NS |
Saddlemount | ||
General overhang limitations | 4' front Rear Overhang: -On a single vehicle may equal 3/4 the length of the vehicle’s wheelbase. -On a combination of vehicles may equal 1/3 the length of the wheel base of the combination. -Overhang is measured from center of rear axle to rear of load. | |
Drawbar | ||
Dromedary | ||
Kingpin to rearaxle | ||
Length special limitations or restrictions | ||
Weight: | Interstate and Defense Highways | State and Other Supplemental Highways |
Steer axle | ||
Single axle | 20,000 | 20,000 |
Tandem axle | 34,000 | 34,000 |
Tridem axle | ||
Gross vehicle weight | 80,000 | 80,000 |
Load per inch width of tire | 600 or the manufacturer’s side wall tire rating | 600 or the manufacturer’s side wall tire rating |
Per wheel | 10,000 | 10,000 |
Tolerances | ||
APU allowance | 550 | 550 |
Natural gas allowance | 2,000 Includes battery powered | 2,000 Includes battery powered |
Weight special limitations or restrictions |
Bridge rules
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The provisions of Title 23 Code of Federal Regulations, Part 658 are applicable to the National System of Interstate and Defense Highways, and reasonable access thereto. No vehicle or combination of vehicles shall be moved or operated on any Interstate Highways when the gross weight on two or more consecutive axles exceeds the limitations specified in Bridge Weight Table 1. This table of weights was developed using the following formula, referred to as the Bridge Gross Weight Formula:
where L is the distance between two or more axles, N is the number of axles of a group of axles and W is the weight in pounds, except that two consecutive sets of tandem axles may carry a gross load of 34,000 lb each if the overall distance between the first and last axle is 36 ft or more.
Exceptions
- The maximum gross vehicle weight shall be 80,000 pounds except where lower gross vehicle weight is dictated by Bridge Weight Table 1.
- The provisions of this rule do not apply to single, or tandem axle weights, or gross weights legally authorized under Oregon law on July 1, 1956. The group of axle requirements established in this section shall not apply to vehicles legally grandfathered under Oregon group of axle weight tables or formulas on January 4, 1975.
- Permits may be issued for two consecutive tandem axles having a loaded weight of 34,000 pounds each, provided the distance between the first and last axles of the two tandem axles is 30 ft or more.
- Permits may be issued for a group of four axles consisting of a set of tandem axles and two axles spaced nine feet or more apart that have a loaded weight of 70,000 lb provided the distance between and first and last axles of the group is 35 feet or more.