GSA

Comprehensive structural design and analysis for standard and complex structures.

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Oasys GSA model - Kings Cross Station roof

What is GSA

Integrate. Optimise. Automate.

Oasys GSA is a leading structural design and Finite Element Analysis (FEA) software used by engineers to design, model, and verify buildings, bridges, and complex structures. By combining fast, powerful analysis with total visibility of the underlying model, GSA ensures your designs aren’t just efficient, they’re fully traceable, auditable, and trustworthy. Whether you’re delivering everyday structures or tackling complex engineering challenges, GSA empowers you to model, analyse, refine, and verify with clarity at every step. With bidirectional interoperability across leading tools such as Revit, Grasshopper, LS‑DYNA, GSA fits seamlessly into both traditional and parametric workflows. You can iterate rapidly, validate every assumption, and maintain full visibility from model setup to final design output. Used by engineers worldwide across buildings, bridges, and specialist structures, GSA’s strength lies not only in its analytical power, but in its complete transparency, from geometry and loads through to solver inputs, internal forces, and code checks.
Oasys GSA model example

Why choose GSA

Engineers choose GSA for its ability to handle complex geometries, automate intensive calculations, and provide high‑fidelity results that support design decisions you can trust. With intuitive modelling tools, sophisticated solvers, and rich 2D/3D visualisation, GSA streamlines workflows, reduces rework, and ensures robust outcomes at every stage of design.

Whether you’re optimising structural behaviour, analysing dynamic performance, or validating design intent to international codes, GSA equips structural engineers with the accuracy, speed, and flexibility needed to deliver safe, efficient, and innovative structures.

GSA clear reliable decisions

Clear, reliable decisions

GSA provides high‑fidelity results backed by transparent modelling, meshing, and solver processes. Engineers can understand, interrogate, and validate every output.

GSA fast modelling and analysis

Fast modelling and analysis

Intuitive tools, advanced solvers, and flexible views make it easy to set up models quickly, refine designs continuously, and shorten project turnaround.

GSA advanced automation

Advanced automation

With the .NET API and Grasshopper integration, engineers can automate interoperability, streamline data exchange, and embed AdSec into computational design workflows using Rhino/Grasshopper.

confidence in code compliance

Confidence in code compliance

With a wide range of international design codes, GSA supports accurate reinforced concrete and steel design checks across global markets.

GSA designed for complex geometry

Designed for complex geometry

From nonlinear materials and staged analysis to dynamic response and large‑deflection behaviour, GSA excels at the challenging scenarios modern engineering presents.

GSA full transparency with two-layer modelling

Full transparency with two‑layer modelling

Switch effortlessly between GSA’s design layer (physical structure) and analysis layer (FEA-ready representation). You always know exactly what is being analysed, giving you unparalleled checkability and trust in the solver.

The future of structural engineering

Parametric design for modern workflows

GSA’s .NET API and Grasshopper plug-in unlock highly efficient parametric workflows, enabling engineers to build, update, and reanalyse models in real-time.

With GSA wrapped inside Grasshopper, you can: – Stream data directly between analysis and design environments – Automate interoperability tasks – Create parametric models or edit existing ones – See analysis results live inside Rhino All you need is a GSA licence, then simply download the plug-in from within Rhino.
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Oasys GSA-Grasshopper plugin

Full structural suite

Unlock GSA’s complete capability set for the most advanced modelling and analysis workflows. The full suite provides: – High‑performance modelling and meshing – Static and dynamic linear and nonlinear analysis – Advanced BIM and CAD connectivity through Rhino, Grasshopper, and Speckle – Footfall and modal analysis – Section capacity checks – Complex and irregular section analysis – GSA + AdSec integration for reinforced concrete and composite workflows Ideal for teams seeking maximum efficiency with complete visibility and verification at every stage.
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Footfall and modal analysis GSA models

Core capabilities

GSA offers a broad suite of capabilities. Packages are tailored to project requirements; use our comparison table to explore the full range of capabilities.

Real-world applications

For decades engineers have relied on GSA to deliver robust, verifiable structural models across diverse sectors. As the industry evolves, GSA continues to innovate, supporting transparent, data-driven approaches that empower engineers to push beyond traditional design methods.

If you have a case study to share, we’d love to hear from you!

FAQs

Find answers quickly

Check the FAQs for quick answers to commonly asked questions. If you can’t find what you’re looking for, you’ll also find links to more detailed guidance and support.

Speak to us about GSA

Contact us today to tailor a GSA package that aligns with your workflows, design needs, and project requirements.