Recognized as one of the leading consultancies in structural engineering for historic and old buildings, Old Structures provides reports, drawings, and specifications that give detailed guidance to owners, designers, and contractors, enabling the preservation, restoration, and alteration of landmarked and other older structures. Donald Friedman and Marie Ennis, the firm’s principals, are widely acknowledged as experts in this field, known both for the breadth of their experience and for their contributions to advancing the knowledge and practice of this specialty.

This is our old web site and is no longer active. If you have reached this page by a bookmark, you should change to the new home page: Old Structures Engineering. If you are looking for our blog, it is also at the new web site.