§554.413. Axle Suspension for Overweight Moves

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a) Truck-tractor drive tandem:

The suspension system on the drive tandem must be designed to distribute a relatively equal amount of weight to each axle at various loadings. A maximum differential of 2000 pounds between the heaviest and lightest axle is allowed for axles that exceed 20,000 pounds. (See Section 15-111 of the Code.)

b) Semitrailers with three or more axles:

The suspension system must be designed to distribute a relatively equal amount of weight to each axle at various loadings. A maximum differential of 3000 pounds between the heaviest and lightest axles in a group is allowed.

(Source: Amended at 36 Ill. Reg. 13254, effective August 1, 2012)

                    
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