A 14-story apartment building (112 units) specified CD Reef V4 CSTB 2021 after a previous underlayment failed acoustic testing. The building design required compliance with NRA (Nouvelle Réglementation Acoustique) standards.
| Feature | Description | |---------|-------------| | Hydrodynamic core | Non-hydrostatic SWASH-based solver with reef-specific drag formulation | | Porosity model | Two-layer (surface + matrix) with variable void ratio (0.3–0.7) | | Wave transmission | Updated empirical formula: ( K_t = a \cdot (B/H_i)^-0.65 \cdot e^-b \cdot \textPorosity ) | | Ecological module | Settlement probability for Posidonia oceanica and coralline algae based on shear stress | | Structural stability | Limit equilibrium of interlocking concrete units (CSTB’s “ReefBlock”) |
If you are a civil engineer submitting a Permis de Construire (Building Permit) or a Lotissement (Subdivision) plan in France, Belgium, or Switzerland, local water agencies (like the Agence de l'Eau) often reference the CSTB database.
A product certified prior to 2021 (e.g., V3 from 2018) may not comply with the latest Zonage Pluvial (Pluvial Zoning) requirements. The 2021 certification ensures: cd reef v4 cstb 2021
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The CSTB is a public establishment in France dedicated to innovation in building and construction. In the context of coastal engineering, CSTB is renowned for operating wave flumes and basins (such as the Jules Verne facility in Nantes) and developing high-fidelity numerical tools that complement physical modeling. A 14-story apartment building (112 units) specified CD
CD Reef is part of the "CESAR" software family (a general finite element code) but functions as a dedicated module for coastal hydrodynamics and structure interaction.
Authentic technical documentation can be found via:
Be wary of vendors showing a "CSTB test report" rather than a full "CSTB Technical Appraisal." A test report is not an approval. If you are a civil engineer submitting a
CD Reef v5 (planned 2024) will include:
To maintain compliance with CD Reef V4 CSTB 2021, installers must follow a strict methodology. Deviations void the technical approval.