General Information
Maximum load limits
may depend on the following:
 What type of highway
you are operating on (See highway types)
 The number of axles
and the distance (spacing) between the axles or axle assemblies
on which the vehicle or combination of vehicles are operated (spacing
is the distance between axles, measured from the center of
one axle to the
center of another axle)
 The gross vehicle
weight of the vehicle or combination of vehicles
 Tire width (published
by the manufacturer)
Depending on the conditions
above, your vehicle may be subject to the maximums found under
the bridge formula or the normal loading standards.
Bridge Gross Weight Formula general information
Examples
The bridge formula applies
to vehicles operating on interstate highways and specially designated
highways which:
 Do not exceed 80,000
pounds gross weight
 Do not exceed the
maximum allowed under the formula
NOTE 1: A vehicle
exceeding 80,000 pounds gross vehicle weight or exceeding the
maximum allowed under the formula is subject to normal loading
standards

NOTE 2: Except
fiveaxle trucktractor semitrailers having two consecutive sets
of tandem combinations
The bridge formula allows
for:
 20,000 pounds for
an axle with at least 9 feet spacing on each side
 34,000 pounds for
a tandemaxle assembly (allowed when two consecutive sets of
tandem axles have axle spacing of 36 feet, measured for the
first and last axles of the consecutive sets; see
definitions page 10)
 Weights for groups
determined by using the Bridge Gross Weight Formula See chart
on back cover of guidebook)
Normal loading maximum
general information MVC 257.722
Maximum loads shall
not exceed the number of pounds in the following provisions:
 18,000 pounds on
an axle with at least 9 feet of spacing on each side
NOTE: Weight can not exceed 700 pounds per inch of
the width of the tire ("width" means as published
by the manufacturer)
 13,000 pounds per
axle when axle spacing is less than 9 feet between two axles
but more than 3.5 feet
 Axles less than 3.5
feet apart shall not exceed 9,000 pounds per axle
It is your responsibility to be aware of frost
law restrictions along with county and city weight limits.
State
Frost Law Information
(800) 7878960 