Terrain Categories: Usually labeled Category 0 to IV (sea to urban). Orography: Consider hills, cliffs, and ridges. Step 4: Peak Velocity Pressure (
ratio. You can achieve this using a combination of TREND , OFFSET , and MATCH : =TREND(Cpe_Upper_Range, hd_Upper_Range, Target_hd) Use code with caution. Best Practices for Structural Verification
Because h=30m > 15m, the sheet will calculate c_s c_d . It will ask for:
ratios) on a hidden reference tab. Use INDEX and MATCH formulas to automatically pull the correct coefficient depending on the building's aspect ratio. Conditional Formatting Warners wind load calculation excel sheet eurocode
Next, you define the environment. Is it a city center (Category IV) or open sea (Category 0)?.
Determine the mean wind velocity at height z based on terrain roughness ( ) and orography (
April 18, 2026 Subject: Computational tool for structural engineering – Wind load determination Standard Reference: EN 1991-1-4:2005 + A1:2010 (Eurocode 1: Actions on structures – Wind actions) Terrain Categories: Usually labeled Category 0 to IV
= (1 + 7 * (0.16 * (z0/0.05)^(-0.07) * LN(z/z0))) * 0.5 * 1.25 * (c_r(z) * Vb)^2
If z≥zmin∶cr=kr⋅ln(z/z0)If z is greater than or equal to z sub m i n end-sub colon c sub r equals k sub r center dot l n open paren z / z sub 0 close paren
Calculate the basic wind velocity, considering seasonal and probability factors ( Excel Formula: =C_season * C_prob * vb0 Step 3: Mean Wind Velocity ( You can achieve this using a combination of
A simple chart showing q_p(z) vs. height – provides instant visual verification against expectations.
In Excel, this requires nested IF statements to ensure that if the design height is less than zminz sub m i n end-sub , the software evaluates the pressure at zminz sub m i n end-sub rather than dropping to zero. 3. Managing Pressure Coefficients ( cpec sub p e end-sub cpic sub p i end-sub