Abstract: A masonry block and hardware set for constructing dry stack walls and columns, including a wall unit, a corner unit, and an end unit, wherein each of the wall, corner, and end units have a top surface with a depression that is brought into substantial alignment when an adjoining block at the same level or in the same course is abutted with the respective unit, and further wherein when any two of the units are adjoined, the units create a vertically oriented space for accommodated clamping hardware, and further wherein each of the end and corner units include an alignment slot to align the end units and the corner units in relation to adjoining wall units. Clamping hardware is employed to bolt the wall while construction proceeds, the hardware being disposed in the masonry unit depressions and in the vertically oriented space created by stacked units. The clamping provides a downwardly directed compressive force and lateral rigidity.

Abstract: A masonry block and hardware set for constructing dry stack walls and columns, including a wall unit, a corner unit, and an end unit, wherein each of said wall, corner, and end units have a top surface with a depression that is brought into substantial alignment when an adjoining block at the same level or in the same course is abutted with the respective unit, and further wherein when any two of said units are adjoined, said units create a vertically oriented space for accommodated clamping hardware, and further wherein each of said end and corner units include an alignment slot to align said end units and said corner units in relation to adjoining wall units. Clamping hardware is employed to bolt the wall while construction proceeds, the hardware being disposed in the masonry unit depressions and in the vertically oriented space created by stacked units. The clamping provides a downwardly directed compressive force and lateral rigidity.

Abstract: A mason wall cementitious building block system comprising two lightweight dry-stackable block units and methods of using such units, including a wall unit and a corner/end unit, connected one to another in an interlocking fashion by means of male posts and female sockets, and variants on each of said units for capping the uppermost course of an assembled wall. The male posts angle rearwardly to define partial apertures, such that adjoining blocks define an aperture which extends vertically between the adjoined blocks for placement of vertical reinforcement, electrical and plumbing chase, and for the introduction of mortar or cement. The top surface defines a recessed cavity for placement of rebar when stacked. The corner/end unit of the present invention interconnects with wall units also by means of posts and sockets and may function as either an end or a corner, requiring only the removal of a small portion of the block at prescored cut lines to alter functions.