Included
- EN 1992-1-1 workflow with configurable project factors
- EC2 or DIN crack-width coefficient sets
- User-defined material libraries
- Local processing and cached machine licensing
Standalone reinforced-concrete section analysis
COSA
Transparent N–My–Mz verification for sections that do not fit a standard catalogue.
INDEPENDENT BY DESIGN
One focused workspace from geometry to capacity.
Create parametric sections or import arbitrary DXF geometry, define reinforcement and materials, apply axial force and biaxial bending, and review SLS and ULS results without depending on a global-analysis package.
- Platform
- Windows desktop
- Design code
- EN 1992-1-1
- Analysis
- N–My–Mz, SLS and ULS
- Geometry
- Parametric + arbitrary DXF
WORKFLOW
A section check you can follow from input to output.
- 01
Build the section
Use five parametric builders or import validated closed DXF geometry with openings.
- 02
Define the model
Set reinforcement, materials, design factors and computational controls.
- 03
Apply actions
Check one N–My–Mz case or import a complete batch.
- 04
Review behaviour
Inspect strains, stresses, equilibrium, crack width and radial efficiency.
- 05
Explore capacity
Review 2D intersections or the interactive 3D resistance envelope.
- 06
Export the work
Produce Word, Excel, CSV and parametric DXF outputs.
01 / GEOMETRY
Standard where useful. Arbitrary where necessary.
Parametric builders accelerate common shapes; validated DXF import handles project-specific boundaries, openings and reinforcement layouts.
- Rectangle, circle, T, box and pipe builders
- Arbitrary closed DXF boundaries and openings
- Editable reinforcement layers
- Geometry and layer-name validation
02 / VERIFICATION
See the mechanics, not only the verdict.
Actions, factors, strains, stresses, equilibrium and numerical results remain visible so sensitive cases can be understood and refined.
- SLS strain compatibility and equilibrium
- Crack-width assessment
- ULS resistance envelopes
- Radial demand-to-capacity efficiency
03 / CAPACITY
Interrogate the full resistance envelope.
Move between familiar plane intersections and an interactive 3D view of the sampled N–My–Mz envelope.
- N–My and N–Mz intersections
- My–Mz intersections at selected axial force
- Interactive 3D capacity envelope
- CSV and Excel capacity export
04 / BATCH & OUTPUTS
From one governing case to a full action set.
Run individual checks or large My–Mz–N batches. Portable projects retain geometry, reinforcement, materials and calculation settings.
- Multiple independent sections per project
- Portable project files
- Word calculation reports
- Excel batch results
TECHNICAL SCOPE
Powerful section analysis, with a deliberate boundary.
Current limitations
- No global structural analysis
- No shear, torsion, fatigue, fire, seismic-detailing, anchorage or ductility checks
- No automatic minimum/maximum reinforcement or congestion verification
- Prestressing is not a supported public workflow
SYSTEM REQUIREMENTS
A standalone Windows application.
- Operating system
- Windows 10 or 11, 64-bit
- Memory
- 4 GB minimum; 8 GB+ recommended
- Processor
- Modern dual-core minimum; quad-core+ recommended
- Storage
- Approximately 5 GB free
- External analysis software
- Not required
- Normal licence use
- Validated licence cached locally
COSA in practice
See what’s new in COSA.
Explore the latest COSA features →
How to calculate ULS section envelopes according to Eurocode 2 →
LICENSING
Start free. Unlock the complete workflow when you need it.
Free covers focused SLS and ULS checks for common sections. Paid memberships unlock arbitrary geometry, batch analysis, capacity envelopes, reports and editable project parameters.
Free
€0
1 activation
A focused version for simple, single-section checks.
- Rectangular, circular and T sections
- Single calculation only — SLS and ULS
- Up to 5 sections per project
- Fixed project parameters
- No arbitrary sections, batch analysis, envelopes or reports
One
€16+ VAT
/month
€192 billed annually · + VAT
Save 16% compared with monthly billing
1 activation
For individual engineers and independent consultants.
- One-week free trial at subscription checkout
- All features, updates and support
For teams
Ten
€66+ VAT
/month
€792 billed annually · + VAT
Save 16% compared with monthly billing
Up to 10 activations
For structural-engineering teams and specialist consultancies.
- One-week free trial at subscription checkout
- All features, updates and support
Unlimited
€166+ VAT
/month
€1,992 billed annually · + VAT
Save 17% compared with monthly billing
Organisation-wide
For larger consultancies deploying COSA across multiple teams.
- One-week free trial at subscription checkout
- All features, updates and support
The one-week trial is available when you start a subscription through Gumroad checkout. Review the trial and billing terms at checkout.
Secure payment, licence delivery and applicable VAT are handled through Gumroad. Prices shown are base prices; VAT is calculated at checkout.
COSA
Want help fitting this into your workflow?
Tell us what you check today and where the process gets slow. The fr.aime labs team will review your enquiry.
FAQ
Before you subscribe.
Does COSA require SAP2000?
No. COSA is independent desktop software and does not require SAP2000 or another global-analysis package.
Can COSA analyse arbitrary geometry?
Yes. It imports validated closed DXF outer boundaries, openings and reinforcement layers, alongside five parametric builders.
Are SLS and ULS included?
Yes. The current scope covers N–My–Mz SLS equilibrium, strain compatibility and crack width, plus ULS envelopes and radial efficiency.
Can I process multiple load combinations?
Yes. COSA supports individual cases and batch analysis with Word and Excel outputs.
How is the licence activated?
Gumroad delivers the licence key. Once validated, it is cached locally for normal use.
Does COSA replace engineering review?
No. Inputs, sign conventions, factors, detailing requirements and results must be independently reviewed by a qualified engineer.