What is the difference between clay tile and hollow brick?
Hollow brick units have more stringent requirements for strength and durability than do structural clay tile. Hollow brick have thicker shell dimensions, higher compressive strength requirements, and requirements for saturation coefficients. Hollow brick units are specified under ASTM C 652. Structural clay load-bearing wall tile, nonload-bearing tile, floor tile, and facing tile are specified under ASTM C 34, C 56, C 57, and C 212, respectively.