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"
53' (1)
48'
Not Specified (2)
20,000
34,000
80,000 (3)
State/Provincial Weight & Size Limits
Steering Axle
(lb.)
Single Axle
(lb.)
Tandem Axle
(lb.)
Gross Vehicle Weight
(lb.)
Tire Manufacturing
Rating
20,000
34,000
80,000
Width
Height
Straight Truck
Semi-Trailer
Full Trailer
Tractor & Semi-Trailer
Tractor &
Semi-Trailer &
Full Trailer
Tractor & Triples
Other/Specials
102"
14'0"
45'
48'
48'
Not Specified
if the trailer is 48' or less
(2)
(4)
Truck & Trailer
65'
(1)  Trailers of 48' to 53' require no more than 41' spacing from kingpin to center of rear axle group.
(2)  Overall length is 61' for the combined trailer units including space between.
(3)  Must comply with Utah bridge table B extended and have 51' from first to fifth axle.
(4)  Allowed with permit only.  Permit must be obtained prior to beginning operation and takes 2 to 4 weeks.