What mechanism do mechanical type masonry fasteners use to achieve their holding values?

Mechanical type masonry fasteners primarily rely on friction to achieve their holding values. When these fasteners are installed, they penetrate the masonry material and create an interlocking relationship with the surface. This interaction increases the surface area in contact, resulting in a frictional force that helps resist withdrawal and shear.

The design of mechanical fasteners often incorporates features such as ribs or teeth that enhance this frictional interaction, ensuring that the fastener is securely held in place. As loads are applied, the fasteners rely on this frictional grip to maintain their hold within the masonry, making the mechanism critical for the fastener's performance in various applications.

Other mechanisms like adhesion, pressure, or tension might play a role in different fastening methods or materials, but for mechanical type masonry fasteners, it is the friction between the fastener and the masonry that is essential for providing the necessary strength and stability.