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.)
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.
Ill. Admin. Code tit. 92, § 554.413
Amended at 36 Ill. Reg. 13254, effective August 1, 2012