New Hampshire Department of Transportation Bureau of Highway Maintenance
Address: John O. Morton Building P.O. Box 483 Concord, New Hampshire 03302
Contact: (603) 271-2691
Hours: 8:00 A.M. – 4:00 P.M. (ET)
Weight:
| Single | 25,000 |
| Tandem | 50,000 |
| Tridum | 70,000 |
| Quad | 85,000 |
Gross Weight:
| 5 Axles | 130,000 |
| 6 Axles | 140,000 |
| 7 Axles | 150,000 |
| 8 Axles | 150,000 Goes to bridge division |
Length: 90’
Width: 16’
Height 16’
Dimension over 13’6 high requires a route survey. No permits for height over 15′ on all turnpikes.
OS/OW Permit shall be submitted to Bridge Design for bridge review if:
- Any bridge on the proposed route has a load posting or weight restriction
- Any axle spacing less than 4′-0″
- Any single axle exceeds 27,500 pounds. (10′-0″ or more to any adjacent axle)
- Any axle of a tandem group exceeds 25,000 pounds. (see note 2)
- Any axle of a tridem group exceeds 22,500 pounds. (see note 2)
- Any axle of a quad group exceeds 20,000 pounds. (see note 2)
- Any group of five axles. (see note 2)
- Any 2-Axle Single Unit exceeds 55,000 pounds.
- Any 3-Axle Single Unit exceeds 72,500 pounds.
- Any 4-Axle Single Unit exceeds 90,000 pounds.
- Any 5-Axle Single Unit exceeds 100,000 pounds.
- Any Single Unit, with 6 or more axles, exceeds 110,000 pounds.
- Any 3-Axle combination Unit exceeds 82,500 pounds.
- Any 4-Axle combination Unit exceeds 95,000 pounds.
- Any 5-Axle Combination V ehicle exceeds 108,000 pounds.
- Any 6-Axle Combination V ehicle exceeds 120,000 pounds.
- Any 7-Axle Combination V ehicle exceeds 130,000 pounds.
- Any Combination Vehicle, with 8 or more axles, exceeds 149,999 pounds.
When Escorts Are Needed:
# of Escorts
| Width 12’ and over | 1 Front |
| Length 80’ and over | 1 Front |
| Overhang 15’ and over w/12’ width | 1 Front + 1 Rear |
Police Escort: Cost $132/ half day (State Police need 48 hour notice)
| Width 18’ and over |
| Length 100’ and over |
