Truck weight limits
New Hampshire
✓ Sources verifiedEditorial review pending credentialed reviewer3 primary sources
New Hampshire caps gross weight at 80,000 lb including all law enforcement tolerances, with a 20,000 lb single axle and 34,000 lb tandem. RSA 266:18 is heavily table-driven and splits on a 73,280 lb threshold, so limits for specific configurations vary — consult the section directly for anything unusual. Dimensions are 102 inches by 13 feet 6 inches, with 14 feet 6 inches allowed for manufactured housing.
At a glance
Max gross weight80,000 lb
Max single axle20,000 lb
Max tandem axle34,000 lb
Permit (width)102 in
Permit (height)13.5 ft
vs. federal gross0 lb
1 Limits and thresholds
| Property | Value | Authority |
|---|---|---|
| Max gross weight | 80,000 lb[1]Including all law enforcement tolerances. Configuration-specific limits differ below the 73,280 lb threshold. | RSA 266:18, II(h) |
| Max single axle | 20,000 lb[1] | RSA 266:18, II(j) |
| Max tandem axle | 34,000 lb[1] | RSA 266:18, II(j) |
| Oversize permit above (width) | 102 in[2] | RSA 266:12 |
| Oversize permit above (height) | 13.5 ft[2]Manufactured housing and modular buildings: 14 ft 6 in. | RSA 266:10 |
| CDL disqualification — first major | 1 year for a first conviction while operating a CMV or a non-CMV; 3 years if operating a CMV transporting placarded hazardous materials. Applies to alcohol/controlled-substance influence, 0.04+ BAC in a CMV, test refusal, leaving the scene, using the vehicle in a felony, driving while disqualified, and causing a fatality by negligent operation.[3]Federal floor. A state may impose longer periods but may not go below this; verify state law before relying on it. | § 383.51(b), Table 1 |
| CDL disqualification — lifetime | Life for a second conviction of any combination of the Table 1 major offences in a separate incident. A state MAY reinstate after 10 years following an approved rehabilitation programme — § 383.51(a)(6) — but not after a subsequent disqualifying conviction. Felony manufacture/distribution of a controlled substance, and severe forms of human trafficking, draw life with NO 10-year reinstatement.[3]Federal floor. The 10-year reinstatement is permissive — states are not required to offer it. | § 383.51(a)(6), (b) Table 1 items (9)–(10) |
2 Sources
- RSA 266:18 — Weight limits — New Hampshire General Court
- RSA 266:10, 266:12 — Height and width — New Hampshire General Court
- 49 CFR § 383.51 — Disqualification of drivers — U.S. Government Publishing Office
Review record
Every figure above was transcribed from the primary source cited beside it and carries a pinpoint locator. Editorial review by a credentialed reviewer is pending.