Abstract: In a method for forming a block having a core, the core is formed in a vertical orientation, providing for increased control of wall thickness. The block has a projection on one surface and a groove on an opposing surface. The block core is disposed parallel to the projection and the groove. The block may be used in a step assembly, a ramp assembly, or a wall. Assemblies made from the block are easy to construct and can be assembled with or without adhesive.

Abstract: In a method for forming a block having a core, the core is formed in a vertical orientation, providing for increased control of wall thickness. The block has a projection on one surface and a groove on an opposing surface. The block core is disposed parallel to the projection and the groove. The block may be used in a step assembly, a ramp assembly, or a wall. Assemblies made from the block are easy to construct and can be assembled with or a without adhesive.

Abstract: A concrete step assembly includes risers with each having a longitudinal projection on its upper end for disposition in a longitudinal receptacle in a bottom surface of a tread resting on the riser. Each riser has a pair of slots in its bottom surface to receive a portion of a projection on a concrete block of each of two supports formed of concrete blocks. Each tread has a pair of transverse receptacles in its bottom surface to receive a portion of a projection on a concrete block of each of the two supports. The transverse receptacles communicate with the longitudinal receptacle in the bottom surface of the tread to enable the portions of the projections on the concrete blocks therein to abut the longitudinal projection on the riser in the longitudinal receptacle. When the concrete block has another of the concrete blocks thereabove, the projection on the lower of the two concrete blocks fits in a groove in the bottom surface of the upper concrete block.