<p> This report contains the results of an exploratory investigation into the strength (compressive and tensile) of the most commonly used cavity wall ties. Z, Truss, Ladder and Corrugated metal ties were tested in the Applied Dynamics Laboratory at McMaster University.</p> <p> A total of 110 specimens were constructed and tested. Fifty-five specimens were tested in compression, another 55 specimens were tested in tension. The influence of different cavity widths and lengths of mortar imbedment on the strengths of the ties were also investigated.</p> <p> The ultimate load capacity, for each tie investigated, was related to loading on a unit of wall area by taking into consideration the recommended spacings for each tie.</p> <p> A strength comparison of the ties tested was made. Finally, conclusions were drawn and recommendations made.</p> / Thesis / Master of Engineering (MEngr)