Wis. Admin. Code § Trans 305.54 – Frames on heavy trucks, trailers and semi-trailers.

(1) No frame may be repaired, modified or altered, nor may additional support be added to a frame, if the structural integrity or alignment of the vehicle is adversely affected.
(2) No frame may be rusted, damaged or cracked to the extent that it no longer properly supports the vehicle or the load carried on the vehicle.
(3) No vehicle may be operated on a highway which is noticeably out of alignment.

History: Cr. Register, February, 1996, No. 482, eff. 3-1-96.