Kallas Millwork Corp. v. Square D Co.

This appeal concerns the interpretation and constitutionality of sec. 893.155, Stats., the statute of limitations primarily applicable in the instance of the claimed negligence of architects and engineers and other designers. We conclude that a high-pressure water system designed for fire protection constituted, as a matter of law, “an improvement to real property” as that phrase is used in sec. 893.155.

We also conclude that sec. 893.155, Stats., is unconstitutional, because it grants immunities to the class of defendants protected therein on a classification basis that is unreasonable and…