MINNEAPOLIS, MN--(Marketwired - October 13, 2015) - Allan Block has released an extensive upgrade to the AB Walls Design Software for segmental retaining walls. AB Walls Design Software is a comprehensive design tool which outputs professional quality construction drawings, along with the technical support data and calculations. This program allows designers to transfer a conceptual layout from a site plan to a complete wall solution, then export to various CADD software programs. This upgrade now lets users design Complex Composite Structures (CCS).