This document describes ADAPT-Builder 2009, a 3D finite element software for analyzing and designing concrete and post-tensioned slab and foundation systems. It provides a powerful yet easy to use tool for analyzing complex slabs and foundations. Unlike 2D programs, it performs true 3D finite element analysis for more accurate results. It also includes dynamic rebar design capabilities and integrates with Revit Structure for bidirectional BIM functionality. Key features include 3D modeling, importing various file formats, component-based assembly, finite element analysis, code checking, reinforcement design, and report generation.