Award of Merit: High-Rise Category
The George Washington University Ross Hall Façade Restoration
Submitted by Concrete Protection and Restoration, Inc.
The George Washington University
Concrete Protection & Restoration, Inc.
Cathedral Stone Products, Inc.
This project involved investigating and repairing the cast-in-place concrete façade of the Walter G. Ross Hall at The George Washington University. The seven-story concrete structure, officially completed on July 1, 1973, houses the teaching and laboratory facilities for the student and administrative offices for the School of Medicine and Health Sciences, the School of Public Health and Health Services, and the Vice President for Health Affairs.
The exterior façade of Ross Hall indicated severe concrete distress, which posed structural as well as life safety concerns. Through field investigation and concrete testing, it was discovered that the biggest cause of the deterioration was poor concrete cover over the reinforcing steel. Due to the life safety issues, during the façade investigation, a repair contractor was put on retainer to provide emergency services for concrete removals to arrest any immediate dangers. Although these emergency measures were taken to lessen the safety hazard, the owner understood that, if left unrepaired, the concrete would continue to deteriorate and future hazardous and structurally deficient conditions would result.
A detailed remediation program was designed and implemented that included removal of the deteriorated and unsound concrete, treatment and repair of reinforcing steel, and the placement of a repair material to match the existing architectural finish of the building. Other repairs included crack injection, tuck pointing, and caulking. Upon completion of the structural repairs, the surface of the building was treated with a mineral-based coating to provide a preventative waterproofing for the unrepaired concrete areas, protection of the new repairs, and to give the building a uniform appearance.