RSA 266:18-a Weight on Non-Interstate and General Highway System.

The driving on ways of this state, other than on the interstate and defense highway system as provided by RSA 266:18, of any vehicle or combination of vehicles exceeding the limitations of this section is hereby prohibited; provided, however, that any police officer shall allow on any way other than the interstate and defense highway system a tolerance of 5 percent above said limitations.
I. Maximum tire and axle gross weights allowable:
(a) The manufacturer's load rating for the tires.
(b) Two axles less than 40 inches apart shall be considered as a single axle unit.
(c) When being driven on any way other than the interstate and defense highway system with a gross weight not in excess of 73,280 pounds:
(1) 22,400 pounds per axle on 3-axle single unit v