Reinforced masonry

Load-bearing masonry with steel reinforcement set inside the block cores and the mortar beds, embedded in grout. It stays masonry — mass, inertia, simple site work — but gains the tensile strength and ductility that ordinary masonry lacks: under an earthquake it cracks but holds, dissipating energy instead of collapsing. It is the choice for masonry buildings in seismic areas.

Reinforced masonry is load-bearing masonry in which steel reinforcement is placed inside the block cores and the mortar beds, embedded in grout. It stays masonry — mass, inertia, simple site work — but gains what ordinary masonry lacks: the tensile strength and ductility needed to resist earthquakes.

Vertical bars threaded into the block cores and locked by a concrete grout give the wall bending strength, out of plane and in plane. Horizontal reinforcement, laid in the mortar beds or in special blocks, ties the courses and resists shear cracking. Together they turn a brittle wall into an element that deforms without breaking suddenly.

Ductility is the real gain: under an earthquake reinforced masonry cracks but holds, dissipating energy instead of collapsing. This is why it is the choice for masonry buildings in seismic areas, where the code asks for the predictable behaviour and safety margins that unreinforced masonry cannot offer.

It is built like ordinary masonry, with the added care of keeping the reinforcement in position, cleaning and filling the cores to be grouted, and tying the wall to the reinforced-concrete ring beams that close the box at each floor. Ring beams and lintels must be insulated so they do not bridge heat, and breathable renders chosen.