Iowa Admin. Code r. 761-511.17 - Maximum axle weights and maximum gross weights for vehicles and loads moved under permit
(1)
Annual
oversize, annual all-systems oversize, and annual all-systems overweight
permits.
a. For movement under an
annual oversize or annual all-systems oversize permit, the axle weight and
combined gross weight shall not exceed the limits found in Iowa Code section
321.463(3).
b. For movement under an all-systems
overweight permit, the axle weight shall not exceed the limits found in Iowa
Code sections 321.463(3) and
321E.8. The combined gross
weight shall not exceed the gross weight authorized under Iowa Code section
321E.8(2).
c. See subrule 511.17(8) for exceptions for
special mobile equipment.
(2)
Annual oversize/overweight
permits or annual raw forest products permits.
a. For movement under an annual
oversize/overweight permit or an annual raw forest products permit, the gross
weight on any axle shall not exceed 20,000 pounds, with a maximum of 156,000
pounds total gross weight.
b. See
subrule 511.17(8) for exceptions for special mobile equipment.
(3)
Multitrip
permits.
a. For movement under a
multitrip permit, the gross weight on any axle shall not exceed 20,000 pounds
with a maximum of 156,000 pounds total gross weight.
b. See subrule 511.17(8) for exceptions for
special mobile equipment.
(4)
Single-trip permits.
a. For movement under a single-trip permit,
the gross weight on any axle shall not exceed 20,000 pounds unless authorized
under Iowa Code section
321E.9(2).
b. If the combined gross weight exceeds
100,000 pounds, a single-trip permit may be issued for the movement only if the
permit-issuing authority determines that it would not cause undue damage to the
road and is in the best interest of the public.
c. Cranes may have a maximum of 24,000 pounds
per axle for movement under a single-trip permit. Routes must be reviewed by
the permit-issuing authority prior to issuance.
d. See subrule 511.17(8) for exceptions for
special mobile equipment.
(5)
Emergency interstate
permits.
a. For movement under this
permit, the gross weight on any axle shall not exceed 20,000 pounds with a
maximum of 90,000 pounds total gross weight.
b. The maximum weight on any single axle
shall not exceed by more than 12.5 percent the maximum axle weight limit in the
nonprimary highway maximum gross weight table in Iowa Code section
321.463(6)
"b" and must comply with posted limits on roads and
bridges.
(6)
Annual fluid milk products permits. For movement under an
annual fluid milk products permit, the gross weight on any axle shall not
exceed 20,000 pounds with a maximum of 96,000 pounds total gross
weight.
(7)
Annual small
crane permit. For movement under an annual small crane permit, the
gross weight on any axle shall not exceed 24,000 pounds with a maximum of
80,000 pounds total gross weight.
(8)
Special mobile
equipment. Special mobile equipment may have a gross weight of 36,000
pounds on any single axle equipped with minimum size 26.5-inch by 25-inch
flotation pneumatic tires and a maximum gross weight of 20,000 pounds on any
single axle equipped with minimum size 18-inch by 25-inch flotation pneumatic
tires, provided that the total gross weight of the vehicle or a combination of
vehicles does not exceed a maximum of 80,000 pounds for movement under an
annual oversize or all-systems oversize permit and 126,000 pounds for movement
under a single-trip, multitrip or annual oversize/overweight permit.
For tire sizes and weights allowed between the maximum and minimum indicated, the following formula shall apply: Axle weight = 20,000 pounds + (tire width - 18) * 1,882 pounds.
(9)
Permitted tandem axle
weights.
a. Vehicles operating under
an annual oversize permit, annual oversize/overweight permit, annual raw forest
products permit, single-trip permit, or multitrip permit may have a gross
weight not to exceed 46,000 pounds on a single-tandem axle of the truck tractor
and a gross weight not to exceed 46,000 pounds on a single-tandem axle of the
trailer or semitrailer if each axle of each tandem group has at least four
tires.
b. The maximum weight of any
single axle within a permitted tandem axle group shall be 24,000
pounds.
c. A permitted tandem axle
shall not be a part of a larger group of axles whose centers are greater than
96 inches apart.
This rule is intended to implement Iowa Code sections 321.463, 321E.7, 321E.8, 321E.9, 321E.9A, 321E.26, 321E.29B and 321E.32.
Notes
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