Mechanical-type masonry fasteners use tensile forces to obtain their holding values. Option c is the right choice.
Mechanical-type masonry fasteners typically rely on tensile forces to obtain their holding values. These fasteners, such as expansion anchors or screws designed for masonry applications, are inserted into pre-drilled holes in the masonry substrate.
As the fastener is tightened, it creates tension within the material, effectively gripping and securing it in place. This tensile force is crucial for the stability and integrity of the connection.
While compression and friction play roles in the overall behavior of masonry structures, mechanical fasteners primarily derive their holding values from the ability to withstand and distribute tensile forces within the material they are anchored into.
Option c is the right choice.