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
22,000 (2)
44,000 (2)
80,000 (2)
State/Provincial Weight & Size Limits
Steering Axle
(lb.)
Single Axle
(lb.)
Tandem Axle
(lb.)
Gross Vehicle Weight
(lb.)
Not Specified
22,000
44,000
80,000
Width
Height
Straight Truck
Semi-Trailer
Full Trailer
Tractor &
Semi-Trailer
Tractor &
Semi-Trailer &
Full Trailer
Tractor & Triples
Other/Specials
102" (3)
13'6"
40'
(4)
28'
65'
Not Specified
if trailers are 28'
or less
Not Permitted
(5)
(1) Trailers of 48' to 53' require no more than 41' spacing from kingpin to center of rear axle group.
(2) Weight on tires shall not exceed maximum allowed by manufacturer.
(3) 96" on lanes less than 12'.
(4) 48' (no bridge requirements); semi-trailers from 48' to 53' cannot exceed 41' from kingpin to center of rear axle or rear group of axles, underride protection in rear of trailer.
(5) Bridge formula for axle weight limits: Distance from #1 to #5 axle (outside bridge) = 51'; 2 or more axles (internal bridge) = Federal formula.
(*) Twin 48' trailers allowed on Florida Turnpike only.