STP992

    Influence of Tie Flexibility, Relative Length, and End-Boundary Condition on Brick Veneer-Metal Stud Flexural Bond Stress

    Published: Jan 1988


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    Abstract

    Based on insights from the Clemson test report on the wall system under discussion, the authors analytically examined the issue of the relative stiffness between the brick veneer and the metal stud.

    Much controversy has surrounded the contention that the inherent stiffness of the brick veneer will result in critical flexural bond stresses in the veneer when laterally supported on metal studs. Using ordinary conventional relative stiffness methods of analysis, the brick veneer can attract 85% or more of the wind load, whereas the metal studs attract 15% or less. Even if the studs are designed to take full wind load at a span-deflection ratio of 360 to 600, ordinary analysis may still indicate that critical flexure bond stresses will occur in the veneer prior to full participation of the stud.

    This paper shows that if the inherent tie flexibility, normal shorter metal stud length, and usually free top boundary wall condition are taken into account, critical flexural bond stresses do not exist in the brick veneer on typical brick veneer/metal stud walls. Recommendations on the utilization of inherent boundary conditions to minimize the development of critical flexural bond stresses in the veneer are presented.

    Keywords:

    ordinary conventional analysis, relative stiffness, computer analysis, brick veneer, metal studs, flexural bond stress, span-deflection ratio, metal tie flexibility, spring constant, fixity, soft joint, relative height


    Author Information:

    Chin, IR
    Senior consultant, architect II, and senior consultant, Wiss, Janney, Elstner Associates, Inc., Northbrook, IL

    Krogstad, NV
    Senior consultant, architect II, and senior consultant, Wiss, Janney, Elstner Associates, Inc., Northbrook, IL

    Monk, CB
    Senior consultant, architect II, and senior consultant, Wiss, Janney, Elstner Associates, Inc., Northbrook, IL


    Paper ID: STP27263S

    Committee/Subcommittee: C15.02

    DOI: 10.1520/STP27263S


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