![]() 5), for further information.įor exterior veneer, water penetration into the cavity is anticipated. See TEK 10-4, Crack Control for Concrete Brick and Other Concrete Masonry Veneers (ref. For veneer, control joints should generally be placed in the veneer at the same locations as those in the backing, although recommended control joint spacing can be adjusted up or down based on local experience, the aesthetic requirements of the project, or as required to prevent excessive cracking. In concrete masonry, control joints and horizontal joint reinforcement effectively relieve stresses and accommodate small movements. Movement may be caused by temperature changes, moisture-volume changes, or deflection. In addition to structural requirements, differential movement between the veneer and its supports must be accommodated. Design criteria are provided in IBC Chapter 16 as well as in TEK 16-4A, Design of Concrete Masonry Noncomposite (Cavity) Walls, (ref. The assembly can be designed as a noncomposite cavity wall where the out-of-plane loads are distributed to the two wythes in proportion to their relative stiffness. ![]() The prescriptive requirements relate to size and spacing of anchors and methods of attachment, and are described in the following sections. Masonry veneers are typically designed using prescriptive code requirements that have been developed based on judgement and successful performance. The backing must be designed to support the lateral and in some instances the vertical loads imposed by the veneer in addition to the design loads on the wall, since it is assumed the veneer does not add to the strength of the wall. 2, 3).įor the purposes of design, veneer is assumed to support no load other than its own weight. Unless otherwise noted, veneer requirements are those contained in the International Building Code (IBC)and Building Code Requirements for Masonry Structures (refs. They differ by the method used to attach the veneer to the backing, as illustrated in Figure 1. There are basically two types of veneer-anchored veneer and adhered veneer. Backing material may be masonry, concrete, wood studs or steel studs. Veneers provide the exterior wall finish and transfer out-of-plane loads directly to the backing, but they are not considered to add to the load-resisting capacity of the wall system. Veneer is a nonstructural facing of brick, stone, concrete masonry or other masonry material securely attached to a wall or backing.
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