STP1444

    Integrating Advance Evaluation Techniques with Terra Cotta Examinations

    Published: Jan 2004


      Format Pages Price  
    PDF Version (352K) 13 $25   ADD TO CART
    Complete Source PDF (9.3M) 13 $109   ADD TO CART


    Abstract

    Fundamental evaluation techniques for terra cotta facades, which include at-arms-length visual review and mechanical sounding, are unsurpassed in determining the existing condition of individual terra cotta units. However, extrapolating the information gained from these techniques to determine the overall condition of assemblies and potential problems is problematic at best and often speculative in nature. Advance evaluation techniques, including impulse response and fiberscope optical survey, can readily identify conditions that do not present themselves to fundamental techniques. These conditions include; excessive stress due to stacking effect at shelf angles, improperly supported corner units, and corrosion of J-hooks, rods, anchors and ties. When this type of additional information is integrated with the information from fundamental techniques the evaluation evolves from being an inventory of existing conditions to a comprehensive understanding of façade performance. This paper will address some of the special techniques that are available for evaluating the nature and extent of distress in terra cotta cladding systems during the performance of a field investigation. Techniques discussed include the use of optical borescopes, in-situ measurement of stresses and impulse response testing.

    Keywords:

    Terra cotta, borescope, in-situ strain relief testing, impulse response testing


    Author Information:

    Gentry, TA
    Architect, Thomas A Gentry Architect, Chicago, IL

    Davis, AG
    Architect, Thomas A Gentry Architect, Chicago, IL


    Paper ID: STP11468S

    Committee/Subcommittee: E06.55

    DOI: 10.1520/STP11468S


    CrossRef ASTM International is a member of CrossRef.