47.5 MB - The Whole Building Design Guide

Figure 3-47:These four ties werenever embedded into themortar joint.Ties are often installed before brick laying begins. When this isdone, ties are often improperly placed above or below the mortarjoints. When misaligned, the ties must be angled up or down tobe embedded into the mortar joints (Figure 3-48). Misalignmentnot only reduces the embedment depth, but also reduces theeffectiveness of the ties, because wind forces do not act in paralleldirection to the ties.Figure 3-48:Misalignm ent of the tiereduces the embedmentand promotes veneerfailure.Corrugated ties typically used in residential and nursing home veneerconstruction provide little resistance to compressive loads.The use of compression struts would likely be beneficial, but off-MAKING CRITICAL FACILITIES SAFE FROM High Wind3-61