Can individual wire ties be used to tie a hollow clay masonry veneer back to concrete masonry? Can these ties have adequate embedment?
Individual ties can be used with hollow masonry. The outer wire should be positioned in the center of the face shell mortar, but at least 5/8 inch back from the exterior face of the wall, as stated in the Brick Institute of America Technical Notes 44B. This is to protect the tie from exposure to weather. Rectangular looped ties should be used for this purpose because "Z" ties will not develop adequate strength with hollow masonry. In concrete masonry, continuous bed joint reinforcement often is used to control shrinkage cracking. Bed joint reinforcement with attached wall ties may be a better choice because it provides both bed joint reinforcement and pre-positioned wall ties.