STP1493

    Erroneous Design Assumptions and Construction Defects in a Thin Stone Facade System

    Published: Jan 2009


      Format Pages Price  
    PDF (876K) 8 $25   ADD TO CART
    Complete Source PDF (21M) 8 $74   ADD TO CART


    Abstract

    During a routine close-up facade inspection of the exterior walls of a 15-year-old, 31-story office building, a loose 30-mm thick granite panel was discovered. Initially, it was believed that this movement was due to the location of the anchorages relative to the panel geometry. A more thorough examination of the panel was performed by inspecting the panel attachment from the interior of the building. This inspection revealed that one of the two epoxied wind load anchors had failed. An extensive investigation of the granite facade panels, including additional close-up exterior and interior inspections, structural analyses, and testing, was undertaken. Interior examinations revealed construction defects in the epoxied anchors. In addition, the structural analyses indicated a flaw in the original design that affected certain panels in high wind load zones. Repairs were designed to address the design and construction deficiencies. Supplemental panel anchorages were installed from the exterior of the building, thereby minimizing disruptions to building occupants. While the implemented panel repairs can be identified at close range, they are imperceptible from publicly accessible vantage points.

    Keywords:

    epoxied pins, granite panels, anchorage design, construction defects


    Author Information:

    Schmidt, Mark K.
    Unit Manager and Senior Consultant, Wiss, Janney, Elstner Associates, Inc., Northbrook, Illinois

    Murphy, Jill H.
    Project Engineer, William A. Kibbe & Associates, Inc., Saginaw, Michigan


    Paper ID: STP47766S

    Committee/Subcommittee: E06.11

    DOI: 10.1520/STP47766S


    CrossRef ASTM International is a member of CrossRef.