Find Heavy Haul Loads Iowa
LEGAL DIMENSIONS:
Length:
53′ semi-trailer and load. (Overhang which results in over 53′ semitrailer and load length is not legal without permit. Steel pipe, beams and constructions materials aren’t exempt.)
Width:
8′-6″
Height:
13′-6″
Weight:
80,000 Gross
Single – 20,000
Tandem – 34,000
Tridem – 42,000 (w/ minimum 8′-1″ axle spacing)
ROUTINE PERMIT LIMITS:
Length:
110′
Width:
16′
Height:
15′-6″
Weight:
Single – 33,000 to 22,000*
Tandem – 56,000 to 38,500*
Tridem – 70,500 to 48,000*
Steer – 600 pounds per inch of tread width (13,200 pounds for 11″ tires)
Loads exceeding these dimensions or are considered as Super Loads.
ESCORTS:
On all highways:
Length:
Over 85′ – one escort or amber revolving light
Over 120′ – one escort
Overhang: Front projection over 25′ or rear over 10′ – one escort or amber revolving light or strobe light on rear of load for rear overhang over 10′).
Height:
Over 14′-6″ – one escort with high pole.
On 4-lane roadways:
Width:
14′-6″ to 16′-6″ – one rear escort or two amber revolving or strobe lights (one on power unit, one on rear extremity of vehicle or load)
Over 16′-6″ on 4-lane roadways – one escort.
On 2-lane highways:
Width:
When width exceeds one-half of roadway width up to and including 14′-6″ – one front escort
Width over 14′-6″ – one escort. An amber or strobe light on the power unit and on the rear extremity of the vehicle or load may be used instead of an escort if the width is up to and including 14′-6″ and exceeds one-half of the roadway and lane width is 12′ or more with sufficient shoulders
