The exposure factor ( c_e(z) ) depends on terrain category and height. Eurocode provides tables. In Excel, you can use VLOOKUP or an approximate formula:
[ I_v(z) = \frack_lc_o(z) \cdot \ln(z/z_0) \quad \textfor z_min \leq z \leq 200 ] wind load calculation excel sheet eurocode
Always check the National Annex for the specific country. Parameters such as vb,0v sub b comma 0 end-sub , roughness, and pressure coefficients ( cpec sub p e end-sub The exposure factor ( c_e(z) ) depends on
Create a lookup table in sheet "Terrain": Parameters such as vb,0v sub b comma 0
: Wind speed changes with height. Excel handles these logarithmic and power-law equations instantly, plotting a precise peak velocity pressure ( ) profile.
For professional use, always verify against the National Annex of the country where the structure is located (e.g., UK NA to BS EN 1991-1-4, DIN NA for Germany). The sheet should be locked and validated to prevent inadvertent changes to code constants.