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"
13'6"
53' (1)
28'
Not Specified
but trailers are
limited to 28' each
20,000 (2)
38,000 (2)
80,000
State/Provincial Weight & Size Limits
Steering Axle
(lb.)
Single Axle
(lb.)
Tandem Axle
(lb.)
Gross Vehicle Weight
(lb.)
Not Specified
20,000
34,000 (3)
79,000
Width
Height
Straight Truck
Semi-Trailer
Full Trailer
Tractor & Semi-Trailer
Tractor &
Semi-Trailer &
Full Trailer
Tractor & Triples
Other/Specials
96"
13'6"
40'
48' (4)
28'
Not Specified
if kingpin to center of
rear axle assembly is
41' of less
Not Permitted
Not Permitted
 
(1) Trailers of 48' to 53' require no more than 41' spacing from kingpin to center of rear axle group
(2) If gross vehicle weight exceeds 73,000 lbs.
(3) 34,000 lbs. if GVW over 73,000 lbs.; 37,000 lbs. if GVW under 73,000 lbs.
(4) Maximum spacing of 41' from kingpin to center at rear axle assembly