The American Driver
From Drivers...For Drivers
National Weight & Size Provisions
Width
Height
Semi-Trailer in
Tractor-Semi-Trailer Combo
Full Trailer
Doubles
Single Axle
(lb.)
Tandem Axle
(lb.)
Gross Vehicle Weight
(lb.)
102"
14'0"
57'6"
28'6"
Not Specified
(1)
21,600
34,320
86,400
State/Provincial Weight & Size Limits
Steering Axle
(lb.)
Single Axle
(lb.)
Tandem Axle
(lb.)
Gross Vehicle Weight
(lb.)
Not Specified
21,600
34,320
86,400 (2)
Width
Height
Straight Truck
Semi-Trailer
Full Trailer
Tractor &
Semi-Trailer
Tractor &
Semi-Trailer & Full
Trailer
Tractor & Triples
Other/Specials
102"
14'0"
40'
48'
48'
65'
(3)
Not Permitted
None
(1)  Length of doubles not specified but trailers are limited to 28'6" each.
(2)  Doubles and tractor-semi-trailer combinations.
(3)  Each trailer not to exceed 28'6" or combined length of 65'.