Downloadable computer software for use by engineers in the design of retaining walls and the efficient use of concrete blocks in the construction of retaining walls

MODULAR CONCRETE BLOCKS FOR USE IN CONSTRUCTION OF MORTARLESS RETAINING WALLS; CONCRETE LANDSCAPE PRODUCTS, NAMELY, PAVERS, SLABS, STEP UNITS, EDGERS, RETAINING WALLS, LANDSCAPING WALLS, FREE STANDING WALLS, BORDER WALLS, AND MODULAR CONCRETE UNITS FOR BUILDING SUCH WALLS; MODULAR CONCRETE UNITS, NAMELY, RETAINING WALL UNITS CONSISTING OF CONCRETE BLOCKS AND CONCRETE BRICKS; LANDSCAPING UNITS CONSISTING OF CONCRETE BLOCKS, CONCRETE BRICKS AND CONCRETE PAVERS; AND ARCHITECTURAL MASONRY UNITS C...