Section 1680-07-01-.09 - CONDITIONS FOR PERMITTING OVERWEIGHT MOVEMENTS(1) In general, the maximum allowable axle weights by special permit are as follows: (a) Single Axle: 20,000 pounds;(b) Tandem Axle: 40,000 pounds; and(c) In no case shall a single axle in a tandem group exceed 20,000 pounds.(2) However, a special permit for the movement of a non-divisible load may be issued for axle weights exceeding the maximum axle weights established in Paragraph (1), subject to the following conditions: (a) The maximum width of the vehicle, including the truck and semi-trailer or trailer combination, shall not exceed ten feet (10'); provided, however, the load may exceed ten feet (10') if properly permitted;(b) No single axle shall carry a load in excess of 23,000 pounds;(c) No tandem axle group shall carry a load in excess of 46,000 pounds; and(d) No axle group of three (3) axles (tridem) shall carry a load in excess of 60,000 pounds.(3) Any movements with a gross weight exceeding 165,000 pounds may only be permitted, as provided in Rule 1680-07-01-.12 or Rule 1680-07-01-.19, if the movement is not detrimental or unsafe to the traveling public and the highway can accommodate the movement. In addition, such movements must be approved by the TDOT Structures Division before a special permit may be issued. Some movements with a gross weight of less than 165,000 pounds may also be subject to the prior approval of the TDOT Structures Division based on the axle spacing of the vehicle carrying the load.Tenn. Comp. R. & Regs. 1680-07-01-.09
Original rule certified June 10, 1974. Repeal and new rule filed July 1, 1982; effective August 2, 1982. Repeal and new rule filed October 31, 1985; effective November 30, 1985. Repeal and new rule filed June 19, 1991; effective August 3, 1991. Rule has been assigned a new control number from 1680-02-02-.09 filed and effective February 1, 2003. Amendments filed February 14, 2018; effective 5/15/2018.Authority: T.C.A. §§ 55-7-203 and 55-7-205.