SACS offshore structural analysis and design software
Analysis, code checks, fatigue, collapse and pile-soil design of offshore structures, from jackets and topsides to offshore wind foundations. Buy it, and train your team, through an authorized Bentley channel partner that uses it.
- 3editions of SACS Offshore Structure, plus SACS Wind Turbine
- 3add-on modules: Pile Structure Design, Collapse, Fatigue Ultimate
- 1,200+engineers trained in SACS by Aryatech
- 18+years in offshore engineering, since 2008
Four editions: what each one includes
Each edition includes everything in the one before it. Ultimate takes the three add-on modules, and SACS Wind Turbine includes all of them.
Swipe the table sideways to compare every edition.
| Capability | SACS Offshore Structure | SACS Offshore Structure Advanced | SACS Offshore Structure Ultimate | SACS Wind Turbine |
|---|---|---|---|---|
| Graphical modellingPrecede modeler, Datagen editor, automatic model generation | ||||
| Static structural analysisLinear and nonlinear, with combine, gap, tow and LDF large deflection | ||||
| Code checksAPI, AISC, EC, ISO, DNV and NORSOK | ||||
| Workflow templates and ProjectWiseCustomisable templates, with project files managed in ProjectWise | ||||
| Wind loadingFor topsides on fixed and floating structures | – | |||
| Wave loadingCompletes static structural and topside analysis | – | – | ||
| SACS Pile Structure DesignNonlinear pile-soil interaction | – | – | Add-on | |
| SACS CollapseElasto-plastic progressive collapse, ship impact, dropped objects and blast | – | – | Add-on | |
| SACS Fatigue UltimateSpectral, time history and deterministic fatigue | – | – | Add-on | |
| Aeroelastic couplingBladed and OpenFAST interfaces for wind turbine foundations | – | – | – | |
| Choose it for | Static analysis and code checks of offshore structures | Adds wind loading, for topsides on fixed and floating structures | Adds wave loading, for jackets, wharfs and dolphins, and takes the add-on modules | Ultimate with all three add-on modules, plus coupled wind turbine analysis |
Edition contents as published by Bentley. Not sure which you need? Tell us your structures and we will recommend one.
Three modules for foundations, accidents and fatigue
Add them to SACS Offshore Structure Ultimate as your work needs them, or get all three in SACS Wind Turbine.
SACS Pile Structure Design
FoundationsPile-soil interaction and nonlinear behaviour, so the foundation holds under extreme loading.
- Nonlinear soil-structure interaction
- Axial, lateral and torsional pile behaviour
- Single piles and multi-pile systems
- Interaction curves for your own soil and pile configurations
SACS Collapse
Accidental loadsStructural failure from accidental events, and the strength left afterwards.
- Nonlinear elasto-plastic analysis for performance-based assessment
- Progressive collapse under extreme loads
- Ship collisions, dropped objects and blasts
- Residual strength and integrity of damaged structures
SACS Fatigue Ultimate
Service lifeCumulative damage from waves, wind and operations, to predict a structure's life.
- Spectral, time history and deterministic fatigue
- Wave, wind, seismic and operational loading
- Cumulative damage ratios
- Automatic stress concentration factors for joint details
- API, ISO and DNV fatigue checks
Pushover, fatigue and ship impact are part of our own offshore structures and life extension work.
Life extension servicesThe programs behind the editions
Bentley lists these technical capabilities for SACS Offshore Structure Ultimate. Some need an add-on module, so we confirm what your edition includes.
Modelling
Build and edit the structural model
Loads
The environment and the operations
Analysis
From the linear solver to collapse
Design
Code checks and redesign
What engineers model in SACS
Fixed and floating, oil and gas and renewables, offshore and in harbour.
- Fixed platforms and jacketsIn-place, transport, lift and life extension analysis of steel jackets.
- TopsidesPlatform and FPSO topsides on fixed and floating structures.
- Jack-up rigsStructural checks of jack-up hulls, legs and the equipment added to them.
- Semi-submersiblesFloating platform structures, with MOSES for the hydrodynamics.
- TLPs and sparsTension-leg platforms and spar structures.
- Subsea structuresSubsea frames and facilities.
- Offshore wind foundationsJackets, monopods and tripods supporting wind turbines.
- Wharfs, dolphins and piersCoastal and harbour structures, docks and breakwaters.
Which edition? Topsides need wind loading, from Advanced. Jackets, wharfs and dolphins need wave loading, from Ultimate. Fixed offshore wind foundations are what SACS Wind Turbine is built for.
Fixed offshore wind foundations, with the turbine in the loop
SACS Wind Turbine, called OpenWindPower Fixed Foundation until May 2025, is SACS Offshore Structure Ultimate with Pile Structure Design, Collapse and Fatigue Ultimate, plus interfaces to aeroelastic solvers.
For floating wind, see MOSES Wind Turbine.
What it adds
- Coupled wave, wind and wind-induced mechanical loading
- Interfaces to the Bladed and OpenFAST aeroelastic solvers
- Wave profiles from spectra, with multiple random seeds
- Wind as a time history or random loading from spectra
- Rainflow fatigue, accumulated across simulations, wind speeds and sea states
- Extreme loads and nonlinear collapse checks
- Automatic offshore jacket generation
Floating structures, from model to code check
MOSES Advanced and Ultimate read SACS models directly, so a floating structure is analysed and designed without being rebuilt.
- 1
Model in SACS
Build the structure in the SACS modeler, with its members, joints and loads.
- 2
Analyse in MOSES
MOSES Advanced and Ultimate import the SACS model for hydrodynamic, structural and fatigue analysis.
- 3
Check in SACS
Run the design code checks on the floating structure in SACS.
We supply and train MOSES, Bentley's software for hydrodynamics, mooring and marine operations.
About MOSESFrom your first licence to a trained team
- 1
Tell us your structures
Jackets, topsides, floaters or wind foundations, and the analyses you run.
- 2
We recommend the edition
Offshore Structure, Advanced, Ultimate or Wind Turbine, and only the add-ons you need.
- 3
Quote or buy online
We send a quote, or you order through our store and we call to confirm.
- 4
Licence delivered
Your SACS licence is delivered and your team can start.
- 5
Train your team
Our SACS courses, from Basic to Advanced, taught by engineers who use it.
Licensing
- SubscriptionEach SACS edition and add-on module is a 12-month subscription with one licence, plus Bentley Keys for expert services and training.
- PerpetualA one-time purchase with yearly SELECT maintenance, including 24/7 support. Ask us if it suits you better.
- Larger teamsEnterprise and other licensing options are available for organisations.
- Students and educatorsFree access to Bentley software for academic use, through Bentley Education.
Training from Aryatech
SACS courses at three levels, from your first platform model to fatigue, pushover and the reassessment of existing structures, with a certificate from Aryatech and Bentley. Classroom batches include a one-month SACS licence.
We sell, train and use SACS
We are offshore engineers as well as a Bentley partner. SACS is part of our own toolkit on fixed, floating and offshore wind structures.
- AuthorizedBentley channel partner for SACS in India and the Middle East
- We use itSACS is one of our main tools for offshore structures, life extension, jack-up and offshore wind work
- We train it1,200+ engineers trained in SACS, from Basic to Advanced
- MOSES toowe supply and train MOSES, which shares models with SACS
What engineers ask us about SACS
What is SACS used for?
Analysis, design and code checking of offshore structures: oil and gas platforms, topsides, floating platforms, offshore wind foundations, and coastal structures such as wharfs and dolphins.
What is the difference between SACS Offshore Structure, Advanced and Ultimate?
SACS Offshore Structure has the modelling and static structural analysis capabilities. Advanced adds wind loading, for topsides on fixed and floating structures. Ultimate adds wave loading, for jackets, wharfs and dolphins, and is the edition the add-on modules work with.
What are the SACS add-on modules?
SACS Pile Structure Design for pile-soil interaction, SACS Collapse for progressive collapse and accidental loads, and SACS Fatigue Ultimate for fatigue. Each works with SACS Offshore Structure Ultimate, and all three are included in SACS Wind Turbine.
What is SACS Wind Turbine?
SACS Wind Turbine is the new name, since May 2025, for OpenWindPower Fixed Foundation. It includes everything in SACS Offshore Structure Ultimate, the three add-on modules, and interfaces to the Bladed and OpenFAST aeroelastic solvers for fixed offshore wind foundations.
Which design codes does SACS check against?
SACS checks to API, AISC, EC, ISO, DNV and NORSOK, and SACS Fatigue Ultimate checks fatigue to API, ISO, DNV and other codes.
Can SACS analyse ship impact, dropped objects and blast?
Yes, with SACS Collapse. It runs nonlinear elasto-plastic analysis of progressive collapse under ship collisions, dropped objects and blasts, and assesses the residual strength of the damaged structure.
Can SACS assess the fatigue life of an existing platform?
Yes. SACS Fatigue Ultimate calculates cumulative fatigue damage under wave, wind and operational loading, and is used for life extension studies of existing platforms.
Does SACS analyse piles and soil?
Yes. SACS Pile Structure Design models nonlinear pile-soil interaction, with axial, lateral and torsional pile behaviour, for single piles and multi-pile systems.
How does SACS work with MOSES?
MOSES Advanced and Ultimate import SACS structural models. After hydrodynamic, structural and fatigue analysis in MOSES, SACS runs the design code checks on the floating structure.
How is SACS licensed?
Each edition and add-on module is sold by Bentley as a 12-month subscription with one licence and Bentley Keys. Perpetual licences with SELECT, enterprise options and free academic access are also available.
Can you train our team in SACS?
Yes. We run SACS courses at three levels, Basic (3 days), Intermediate (5 days) and Advanced (5 days), and have trained more than 1,200 engineers, with a certificate from Aryatech and Bentley.
Do you use SACS on your own projects?
Yes. SACS is one of our main analysis tools for offshore structures, life extension, jack-up rigs and offshore wind, where we couple it with GH Bladed or FAST.
Need SACS for your offshore team?
Tell us the structures you design and how many engineers need it. We will recommend the edition and add-ons, and send a quote.