Fortus Square Foot™ has been thoroughly tested for connection and strength in accordance with the design methodology promoted by the National Concrete Masonry Association (NCMA). Fortus Square Foot’s patented SecureLug™ Variable Connection System, when combined with gravel infill and geosynthetic reinforcement creates a strong, long lasting retaining wall. Fortus Square Foot™ can be built with a standard set-back, through the use of its segmented rear lugs, or installed near-vertical, by removing the rear lugs and engaging its center lugs. Regardless of which set-back that’s chosen, Fortus Square Foot’s Variable SecureLug™ connection system allows for significant lateral movement without losing the connection interlock. Fortus Square Foot™ walls flex with seismic pressures and resist weathering. The hollow core of each unit provides excellent drainage, reducing the buildup of hydrostatic pressure. The light weight Fortus Square Foot™ unit does not require the use of expensive pins or clips and promotes layout flexibility, while saving time and expense during installation.