Wisconsin Statutes Highways (Ch. 80 to 86) § 86.14. Strength of bridges

(1) After July 1, 1943, no bridge or culvert shall be constructed in any highway unless it shall be designed to have sufficient strength to carry at least 15 ton truck loading in accordance with standard specifications covering design for structures as adopted by the department and in force at the time of design. Repairs to any bridge or culvert shall be of substantial character, strengthening same as much as practical.

(2) Any person who subjects any bridge or culvert to a load in excess of maximum limitations on weight of vehicles on highways imposed by law or regulations thereunder or limitation as to gross weight of vehicles as posted on or at any such bridge or culvert shall be liable for double the amount of damages that may be caused thereby. There shall be no recovery for any injury to that person or to the property in that person's keeping.

(3) Every person who willfully injures any highway structure shall be liable for treble damages to the subdivision of the state chargeable with the maintenance or repair of such structure.