CSI ETABS Ultimate 22 is the world's most widely used structural analysis and building design software, developed by Computers and Structures Inc. (CSI) — the same company behind SAP2000 and SAFE. Trusted by structural engineers, architects, and construction firms on every major building project worldwide, ETABS is the definitive tool for the analysis and design of multi-story buildings, high-rises, towers, and complex structural systems.

The Ultimate edition is the highest tier in the ETABS lineup, unlocking every analysis capability including nonlinear time-history analysis, buckling analysis, staged construction, base isolation, and the full suite of international design codes. Version 21 brings significant improvements to the analysis engine, steel and concrete design code updates, and enhanced BIM integration with Revit and IFC workflows.

With a lifetime license you pay once and own the software permanently. No annual maintenance fees, no subscription — complete ETABS Ultimate access on your machine forever.

Features of CSI ETABS Ultimate 22 For Windows [Lifetime License]

3D building modeling — floors, columns, beams, walls, ramps, and cores

Linear and nonlinear static analysis

Modal analysis — eigenvalue and Ritz-vector methods

Response spectrum analysis for seismic design

Nonlinear time-history analysis with direct integration and FNA methods

Buckling analysis for stability assessment

Staged construction analysis — simulate progressive building loads

P-delta effects for geometric nonlinearity

Base isolation and damper modeling for seismic performance

Steel frame design — AISC, Eurocode, BS, IS, and 20+ international codes

Concrete frame design — ACI, Eurocode, AS, IS, and international codes

Composite beam and deck design

Shear wall and coupling beam design

Auto-generation of seismic and wind loads per international standards

BIM integration — direct link with Autodesk Revit and IFC import/export

Post-processing — deformed shapes, force diagrams, stress contours

Interactive database editing for bulk model modification

Section designer for custom cross-section definition and analysis

System Requirements & Technical Details

Component	Requirement
OS	Windows 10, 11 (64-bit)
Processor	Intel Core i5 or AMD equivalent (i7 or higher recommended)
RAM	8 GB minimum (16 GB recommended for large models)
GPU	Dedicated GPU recommended for 3D visualization
Storage	4 GB free disk space
Display	1280 x 1024 resolution or higher
Internet	Required for activation only
Additional	Microsoft .NET Framework 4.8 or higher