Computers & Structures, INC

Structural and Earthquake Engineering Software

Computers & Structures, INC.

Computers & Structures, Inc. (CSI) has been a pioneering leader in developing structural and earthquake engineering software solutions. Established in 1975 in California, USA, CSI has been trusted by numerous engineering firms in more than 160 countries. Some of the major projects completed by CSI products include the Taipei 101 Tower in Taiwan, One World Trade Center in New York, the 2008 Olympics Birds Nest Stadium in Beijing, and the cable-stayed Centenario Bridge over the Panama Canal


CSI has a comprehensive portfolio for design and analysis: SAP2000, CSiBridge, ETABS, SAFE, and PERFORM-3D. Each of these solutions caters to a wide type of structures and problems, ensuring users have the right set of solutions for their work.

Explore Computer & Structure products

BIM 360 is part of the Autodesk Construction Cloud, connecting workflows, teams, and data to help you build better.


Intended for use on civil structures such as dams, communication towers, stadiums, industrial plants and buildings.

CSI Bridge

Modeling, analysis and design of bridge structures have been integrated into CSiBridge to create the ultimate in computerized engineering tools.


Specifically developed for multi-story commercial and residential building structures, such as office towers, apartments and hospitals.


Provides an efficient and powerful program for the analysis and design of concrete slabs and foundations, with or without post-tensioning.

Perform 3D

A highly focused nonlinear tool offering powerful performance based design capabilities. Include a number of nonlinear such as frame hinges, shear walls, dampers, braces, and seismic isolators.

CSI Plant

Analysis and design of piping systems and frame structures, including piping code compliance checks with stress-intensification and flexibility factors that are automatically calculated and applied.


Analysis and design of columns, efficiently addressing the design of columns of any concrete, reinforced concrete, or composite cross-section. Design columns in accordance with user-specified codes.

Structural Engineering: A gift to humanity

CSi Plant

Creating new models in SAP2000