What do mechanical type masonry fasteners primarily rely on to obtain their holding values?

Mechanical type masonry fasteners primarily rely on friction to obtain their holding values. The principle of friction is essential in ensuring that the fasteners remain securely in place within the masonry material. When the fastener is installed, it penetrates the masonry and creates a mechanical interlock. This interlock generates resistance against any force attempting to pull the fastener out, relying largely on the surface contact and friction between the fastener and the masonry.

While adhesion can contribute to the performance of some fastening systems, mechanical fasteners do not depend on adhesive properties to hold; instead, their effectiveness is derived from how tightly they grip the surrounding material. Compression and tension are forces that can be relevant in different contexts, particularly in structural applications, but they do not specifically determine how mechanical fasteners hold in masonry. The primary mechanism here is the friction developed by the contact surfaces, ensuring the fastener maintains its position against various loads.