1.1 This specification covers brick made from clay or shale or mixtures thereof and are suitable for surfacing industrial floors. Ceramic shapes known as quarry tile are not covered by this specification. 1.2 Terminology related to This specification covers brick made from clay or shale or mixtures thereof and are suitable for surfacing industrial floors. Four types of industrial floor bricks are covered: Types T, H, M, and L. Brick shall conform to the physical requirements for