ASDIP.Structural.Retain.v3.7.1 ASDIP Retain is a suite of modules specifically dedicated to the design of retaining walls, based on the latest IBC / ACI 318 specifications, that greatly simplifies the time-consuming calculations in any structural engineering office. ASDIP Retain includes the design of the following two types of retaining walls: Cantilever Retaining Walls: Design of a retaining wall supported only at the base under the combination of earth pressure, surcharge, wind and seismic loads. The module designs the wall per the load combinations of the ASCE 7. Restrained Retaining Walls: Design of a retaining wall supported at the base and laterally restrained at the top, also known as a basement wall, under the combination of earth pressure, surcharge, wind and seismic loads. The module designs the wall per the load combinations of the ASCE 7.