Historic Structures

Cleveland Public Library

Cleveland, Ohio

 Evaluated settlement-related claims and assisted in dispute resolution when unanticipated conditions were encountered during construction of a new, 10-story wing adjacent to the main building. A timeline of construction activities was developed to assess the contribution of various excavation operations on the reported damage claim. RRJ performed level surveys and site inspections of the structural building frame, marble facade, and the interior finishes to assess claims of settlement-related damage.

Delaware Building

Chicago, Illinois

Investigation of bowing door jambs and sagging floors at the historic Delaware Building, the oldest building in Chicago's Loop and designated as a Chicago Landmark. Over time, various owners and tenants knocked large holes through interior brick masonry bearing walls and floors were leveled with a thick concrete topping, adding significant weight. RRJ designed repairs to restore the bearing wall load-carrying capacity and strengthen existing floor joists.

Frank Lloyd Wright | Gridley House

Batavia, Illinois

Structural evaluation of the original wood roof truss system of this 1906 Prairie School style house designed by Frank Lloyd Wright and listed on the National Register of Historic Places. Field survey included measuring the existing spans, deflections, structural member sizes, and documentation of the as-built conditions and framing configurations. Data from the field survey was used to perform a structural analysis to assess structural adequacy of the roof trusses and framing system.