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GSA Building is a structural analysis and design program. It gives engineers the tools they need to create any type of building.

With this intuitive software, engineers can design structural models with a full range of 1D, 2D and 3D elements. GSA Building also combines steel and concrete design to a range of international codes, footfall or human-induced vibration, and soil-structure interaction analysis in the same package. For seamless working, GSA Building integrates with Revit Structure and other BIM programs. Integration with BIM applications is a fundamental feature that encourages design coordination across teams.


GSA Building saves time and money by designing steel beams and slab reinforcement directly from the analysis results. It will also analyse how the structure interacts with the ground or predict the footfall vibration on irregular floors or staircases, whether they are concrete, steel, or composite.

GSA Building — Advanced building design software in one powerful package


How GSA Building works


Input: Create structural finite element analysis models using CAD and BIM links, directly in the table or graphical views, or using your own scripts via the Application Programming Interface. Assign linear and nonlinear materials to a variety of element types, whether beams from catalogues, standard shapes, profiled slabs, or your own special requirements. Add static, dynamic, prestress, or thermal loads and analyse the effect.


Analysis and Design: GSA includes several solvers, including:

  • steel member and concrete slab design

  • footfall analysis for human induced vibration

  • matrix-based stiffness method for static and p-delta analyses

  • dynamic relaxation and explicit solvers for nonlinear static and dynamic problems

  • eigenvector solvers for modal vibration and buckling analyses

  • dynamic response analyses for seismic response spectrum or time history, harmonic and periodic vibrations, vibrations

  • soil structure interaction for rafts and piled structures

  • diagnostic analyses for resolving modelling problems


GSA will find the lightest, shallowest, cheapest, or most environmentally friendly steel beam section to carry the load, and work out the ideal quantity of reinforcement in your concrete slabs and walls.

Output: Output forces, moments, deformed geometry, and other results in graphical views, tables, and graphs. Export analysis models to LS DYNA, model changes to Revit, or text and numbers to Office documents.

Key Features and Benefits

  1. Simulate advanced footfall analysis with accurate tools developed by engineers at the forefront of this technique
  2. Integration with Autodesk’s Revit Structure and other advanced modelling software will ensure high integrity of model transfer and also accurate model coordination
  3. Raft analysis - Combine structural models with non-linear soil for foundation design
  4. Steel design - Design of steel beams, columns, and braces to international design codes
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