Mechanical anchor systems are commonly installed in historic masonry materials despite the lack of manufacturer-specified design values for this type of substrate. Scaffolding lateral supports, signage installations and telecommunication mounting systems all use these mechanical fasteners in natural stone materials.

The current lack of codes, guidelines or recommendations for tensile and shear design criteria in historic masonry materials leaves structural engineers to improvise the design and specification of these anchors.  ….

READ FULL ARTICLE including study results, diagrams, photograhs, and conclusions via STRUCTUREmag – Structural Engineering Magazine, a Joint Publication of NCSEA | CASE | SEI