Description
STR Master is 3D-LABS’ structural analysis and design application for Windows. It does the frame, plate and shell work you expect from a general structural package, and then keeps going into the equipment structures most packages leave out β tanks, silos, racks and vessel-supporting steel β with every code check traced back to the clause it came from.
What STR Master does
Analysis
- 3D frame, plate, shell and solid element analysis
- Linear static, P-Delta, buckling and modal analysis
- Nonlinear, time-history and pushover analysis
- Load generation for wind and seismic across multiple code families
- Moving loads, crane loads and construction stage cases
Design
- Steel design to IS 800, AISC 360, EN 1993, CSA, AS 4100, BS 5950 and SANS
- Reinforced concrete design for beams, columns, slabs and footings to IS 456 and ACI 318
- Timber, aluminium and composite member design
- Finite element connection checks for bolted and welded joints, base plates and anchor bolts
- Extended section libraries covering Indian, American, European and Australian profiles
Equipment and industrial structures
- Storage tank structural checks across 16 tank codes
- Silo and bunker design across 12 silo codes β the gap no packaged competitor fills
- Pipe racks, technological structures and equipment platforms
- Vessel support steel, skirts, lugs and saddle-supported equipment
- ASME Section VIII vessel checks for the structural interface
- Solar PV racking and support structures
Workflow and interoperability
- BIM exchange with Revit, Tekla and IFC
- DXF drawing export and model import from CAD
- Team collaboration with shared cloud projects and check-and-approve sign-off
- Programmable API for batch runs and parametric studies
- Tank and structure bill of materials with material purchase list and cost estimate
Codes and standards supported
IS 800, IS 456, IS 875, IS 1893, IS 4995 and IS 9178 for silos, AISC 360, ACI 318, ASCE 7, Eurocode 3 and 4, BS 5950, AS 4100, CSA S16 and SANS 10162, with API 650, API 620 and API 653 for tank structures and ASME Section VIII for vessel interfaces.
How STR Master compares with STAAD.Pro
STAAD.Pro is the general-purpose benchmark. STR Master covers the same analysis and design ground, and adds the equipment structures that force most offices into a second tool or a spreadsheet.
| Capability | STR Master | STAAD.Pro |
|---|---|---|
| Silo and bunker design to dedicated silo codes | 12 silo codes | Not covered β hand calculations or FEA |
| Tank structural design to tank codes | 16 tank codes | Not covered |
| Every code check traced to formula, inputs and clause | Yes | Results reported, source not traced |
| AI assistant that builds and checks the model | Builds, runs and verifies models | Copilot answers questions about the software |
| Finite element connection checks inside the frame workflow | Built in | Separate product or add-on |
| Steel, concrete, timber, aluminium and composite design | Yes | Yes |
| BIM exchange (Revit, Tekla, IFC) | Yes | Yes |
| Price for an equivalent seat | A fraction of the cost | Premium subscription |
Why engineering teams choose STR Master
- The equipment structures are not an afterthought. Silos, tanks, racks and vessel steel are first-class modules, not something you fake with a general frame model.
- Clause-by-clause tracing. Every governing check shows the formula, the inputs and the code clause, which is what a checker or third-party reviewer actually asks for.
- An AI assistant that does the work, not the FAQ. It builds models from drawings, runs the studies and reports what governs β and cites the source of every figure it reports.
- One model, many codes. Switch the design code on the same model to compare an Indian, American and European check without rebuilding.
- Team sign-off built in. Designer, checker and approver roles with an audit trail on shared cloud projects.
- Offline capable. Full desktop operation on Windows 10 and 11 with no internet dependency for analysis work.
Outputs you can issue to a client
- Analysis and design report in PDF with CSV result export
- Design summary tables by member group with governing load case and ratio
- Connection and base plate check sheets
- Tank, silo and structure drawings as PDF and DXF
- Bill of materials, purchase list and cost estimate
- Model exchange files for Revit, Tekla and IFC
What is the licensing model?
Single-user perpetual licence with one year of free updates, or a site licence for concurrent users across a design office. Annual maintenance covering code-update patches and priority support is available separately. Runs on Windows 10 and 11 64-bit.
Is a free trial available?
Yes. A fully functional trial is available on request through the 3D-LABS contact form, limited by model size so you can evaluate the full workflow on a representative structure.
Who should use STR Master
Structural engineers in EPC and consultancy offices, industrial structure designers, tank and silo specialists, and teams who need steel, concrete and equipment-support design in one package with defensible code tracing.
Support
Licensed users get direct access to the engineers who build the software. Reach us on WhatsApp or by email for setup help, code questions and review support on live projects.
About STR Master β Structural Stress Analysis Software
STR Master β Structural Stress Analysis Software is a specialised engineering application from 3D-LABS, built by engineers who use it in practice. It sits between an Excel spreadsheet (too basic) and a full engineering suite (too expensive) β purpose-built for one job, done well.
Key features
- Windows desktop application — installs on Windows 10 and 11, 64-bit. Needs an internet connection to activate on first install and for periodic licence checks.
- Your project files stay local — work is saved on your own machine or network drive, not in the cloud.
- Excel-compatible import/export β bring your existing spreadsheet data in; export results to Excel for reporting.
- Version history β every change is tracked; roll back to any prior state.
- Team collaboration β real-time collaboration on shared projects, with role-based access.
- API access β integrate with your existing workflow through REST API endpoints.
System requirements
Windows 10 or 11, 64-bit. Minimum 4 GB RAM. An internet connection is required to activate the licence on first install and for periodic licence checks.
Free trial
14-day full-featured trial without payment. Sign up with your email, no credit card required. If you upgrade to a paid licence during the trial, no data is lost β everything you built during the trial carries over.
Pricing
STR Master β Structural Stress Analysis Software is priced at βΉ74,999 for a perpetual single-user licence with 12 months of updates and email support. Annual renewal from year 2 is 30% of the original price. Team licences and floating licences available for organisations. Volume discounts on 5+ seats.
Support and updates
Email support included with all licences β response within one business day (Mon-Sat, IST). Video onboarding sessions at no extra charge for new users. Software updates roughly quarterly with bug fixes, new features, and code-reference updates. Enterprise SLA (4-hour response) available on request.
Related products and services
- Browse other 3D-LABS software products.
- Complement with our 686 engineering spreadsheets β Excel tools for calculations that do not need dedicated software.
- Need custom software development? See our IT services.
- Prefer AI-driven automation? Explore our 166 AI agents.
Frequently asked questions
What platform does STR Master β Structural Stress Analysis Software run on?
STR Master β Structural Stress Analysis Software is a Windows desktop application. It installs on Windows 10 and 11, 64-bit, and your project files are saved on your own machine or network drive. It is not available for Mac, Linux or mobile devices. An internet connection is needed to activate the licence on first install and for periodic licence checks.
Is there a free trial?
Yes. A 14-day full-featured trial is available without payment β sign up with your email at the trial link on this page. No credit card required. If you upgrade to a paid licence during the trial, no data is lost.
What is the pricing model?
Purchase includes a perpetual licence for one user with 12 months of updates and support. Annual renewal (from year 2) is 30% of the original licence price and covers all software updates and email support. Team licences and floating licences available for organisations.
How does support work?
Email support included with all licences β response within one business day (Mon-Sat, IST). Priority support available for enterprise customers with 4-hour SLA. Video onboarding sessions available for new users at no extra charge.
How does STR Master β Structural Stress Analysis Software compare to alternatives?
The nearest alternative is typically an Excel spreadsheet or a large all-in-one engineering suite. STR Master β Structural Stress Analysis Software fills the gap: purpose-built for one job, faster than Excel, cheaper than a full suite, and integrates cleanly with your existing workflow. Comparison sheet available on request.
About 3D-LABS software
STR Master β Structural Stress Analysis Software is one of five specialised engineering software applications from 3D-LABS. Every application is built and maintained by the engineers who use it in practice β this is applied practice packaged as software, not consulting-firm software built by a marketing team.
