Building blocks made from concrete; building blocks incorporating insulating materials made from expanded polystyrene, concrete; blocks of concrete; modular homes not of metal; non-metallic building materials for use with concrete, namely, reinforced concrete slabs, foundation slabs, basement wall slabs, plates, load-bearing walls, retaining walls, building envelopes, partitions, pillars, columns, beams, main beams, arches, roofs, shell structures, floors, corbels, vaults, domes, cupolas; con...