The sheet uses the inputs to calculate how wind speeds change with building height: Accounts for the friction of the terrain. Orography Factor (
We need the roughness factor $c_r(z)$. $$c_r(z) = k_r \ln(z / z_0)$$ $$k_r = 0.19 \times (z_0 / z_0,II)^0.07$$ (Note: $z_0,II = 0.05m$) .
For a detailed manual walkthrough to verify your own spreadsheet, SkyCiv provides a fully worked example including diagrams for different building zones. Calculation of wind peak velocity pressure - Eurocode 1
Verified Eurocode Wind Load Calculation Excel Sheets: A Technical Guide wind load calculation excel sheet eurocode verified
A robust Eurocode wind load calculation sheet typically includes several well-organised worksheets:
The insights in this guide are drawn from a variety of authoritative sources and community-validated examples. For further reading and to access some of the mentioned resources, refer to the following:
Even a minor typo in a cell formula can result in under-designing a structure (leading to structural failure) or over-designing it (causing massive material waste). The sheet uses the inputs to calculate how
Run the same building geometry through established FEA platforms (e.g., SCIA, Robot, or Dlubal RFEM) to confirm that the peak pressures match.
we=qp(ze)⋅cpew sub e equals q sub p open paren z sub e close paren center dot c sub p e end-sub
Additionally, EN 1991-1-4 defines cpe,1 for members with a loaded area of 1 m² or less and cpe,10 for members with a loaded area of 10 m² or larger, with linear interpolation used for intermediate values. For a detailed manual walkthrough to verify your
Select from Categories 0 to IV (e.g., coastal, open country, or city) to determine roughness length ( ) and minimum height ( z sub m i n end-sub ) from Table 4.1 of EN 1991-1-4. Building Geometry: Input building height ( ), width ( ), and depth ( ExcelCalcs Step 2: Calculate Mean Wind Velocity and Turbulence
The building must be divided into specific "zones" (e.g., A, B, C, D, E for walls) to apply the correct pressure coefficients. Wind Actions to Bs En 1991-1-4 - SteelConstruction.info
To illustrate, consider the process of determining the wind pressure on the walls of a rectangular building using a verified sheet:
Verification is the process of ensuring the spreadsheet's mathematical formulations accurately represent the Eurocode's requirements. This is typically achieved by comparing the spreadsheet's output to a set of pre-defined benchmark problems.
The spreadsheet must calculate how local terrain roughness and topography modify wind speeds: Roughness Factor (