Dlubal RSTAB v8.05 The 3D structural frame analysis program RSTAB is the ideal tool for the design of beam structures consisting of steel, reinforced concrete, timber, aluminum, or other materials. With RSTAB you can easily and quickly define a structural model and then calculate the internal forces, deformations, and support reactions. For further design, there are various add‑on modules available, considering structural data of specific materials and standards. RSTAB is a powerful analysis program for 3D beam structure calculations, reflecting the current state of the art and helping structural engineers to meet requirements in modern civil engineering. RSTAB is the basis of a modular software system and provides intuitive modeling of simple and complex structures due to it's ingenious input technique. The efficient RSTAB solver allows for linear and nonlinear calculations of internal forces, deformations, and support reactions. For further designs, there are the add-on modules available, considering structural data of specific materials and standards. Due to the modular software system, you can combine various products of Dlubal Software in a program package that meets your individual needs.