01Geometry and reinforcement
Choose a standard section or define a custom outline, then set the reinforcement layout.
SBA : Béton arméSections en béton armé
Reinforced concrete sections · iPhone
Reinforced concrete section
checks and design
Biaxial bending, SLS stresses, crack width, reinforcement design. EC2, SIA 262, BAEL 91.
Geometry, materials, loads, analyses, PDF report.
On-device computation · No account · 7-day trial
Resistance domain
N · Mx · My
● λ < 1● λ = 1● λ > 1
Supported codes
Eurocode 2
SIA 262
BAEL 91Advanced parameters for each code profile.
01 / SETUP
Parametric, hollow or custom sections.
Solid or hollow sections, beams, walls or a custom outline. Define the concrete geometry, reinforcement layout, materials and load cases.
02Materials
Select a design code, concrete and steel strengths, and adjust the advanced parameters.
03Load cases
Enter axial forces and bending moments, or import several load cases at once.
02 / ANALYSE
Section analysis.
Section and load cases are entered once and shared by every analysis.
BIAXIAL BENDING
3D resistance check.
Rotate the interaction surface, select a load case and inspect its check. Colours distinguish loads within the resistance domain, on its boundary and outside it.
- N–Mx–My interaction surface
- Checks for each load case
- Resisting moments
● λ < 1● λ = 1● λ > 1
03 / DOCUMENT
PDF report: assumptions, inputs and results.
Bring project inputs, figures and results together in a PDF report. Choose a concise or detailed presentation, then select the tables and plots to include.
- Geometry, materials and loads
- Result figures and tables
- Customisable content for each analysis
04 / VALIDATION
Results compared with established software.
The SBA engine is checked against known solutions: more than 900 automated checks, including 70 comparisons with published examples from commercial software, replayed with the same assumptions.
900+automated checks
70comparisons with published examples
4reference programs: SOFiSTiK, Robot, CDS, ETABS
Relative differences, same assumptions.
| Reference | Quantity | Ref. | SBA | Difference |
|---|---|---|---|---|
| CDS · circular pileσc SLS compression [MPa] | σc SLS compression [MPa] | 2.071 | 2.071 | 0.00 % |
| SOFiSTiK · DCE‑EN1Required As [cm²/m] | Required As [cm²/m] | 3.334 | 3.335 | 0.01 % |
| CDS · rectangleσs tension steel SLS [MPa] | σs tension steel SLS [MPa] | 59.679 | 59.679 | 0.00 % |
| Robot · ex. 1Required As [cm²] | Required As [cm²] | 8.57 | 8.57 | 0.01 % |
| CDS · T beamσs biaxial bending [MPa] | σs biaxial bending [MPa] | 144.63 | 144.63 | 0.00 % |
| ETABS · ex. 001Required As [mm²] | Required As [mm²] | 916 | 919 | 0.31 % |
| CDS · circular pileσs tension steel SLS [MPa] | σs tension steel SLS [MPa] | 170.85 | 170.83 | 0.01 % |
| Robot · ex. 2MRd [kN·m] | MRd [kN·m] | 320 | 319 | 0.32 % |
| CDS · T beamSLS N–M curve (100 pts) | SLS N–M curve (100 pts) | — | — | 0.12 % |
Excerpt from 70 comparisons. The three CDS calculation notes published by Cerema (circular pile, rectangle, T beam) are replayed in SBA.
T beam · SLS N–M interaction diagramMean difference 0.12%
SBACDS (Cerema)
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Every plan includes all analyses and PDF export.
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per week
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- No limit on analyses or PDF exports
- Automatic renewal
- Future updates included
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Billed annually.
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Equivalent to $0.96/week
- No limit on analyses or PDF exports
- Automatic renewal
- Future updates included
Reference prices in US dollars. Local price and currency confirmed by Apple.
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