[ c_s c_d = \frac1 + 2 \cdot I_v(z_s) \cdot \sqrtB^2 + R^21 + 7 \cdot I_v(z_s) ]
=IF(AND(h/d>=1, h/d<=5), 1.3 - 0.3*(h/d -1)/4, IF(h/d<1, 1.3, IF(h/d>5, 0.8, "error"))) Better: Use a linear interpolation table for ( c_f ) based on ( h/d ) ratio and wind incidence angle. For buildings with height < 15 m and non-slender, ( c_s c_d ) can be taken as 1.0. For dynamic sensitive structures:
In practice, Eurocode provides a more direct route: wind load calculation excel sheet eurocode
Simplify for engineering: Use the tabular values from EN 1991-1-4 Table 4.11.
Create a lookup table in sheet "Terrain": [ c_s c_d = \frac1 + 2 \cdot
While commercial software exists, many engineers prefer the transparency, customizability, and cost-effectiveness of a well-structured . An Excel-based wind load calculator allows you to understand every variable, apply national annexes, and avoid "black box" engineering.
[ F_w = c_s c_d \cdot c_f \cdot q_p(z_e) \cdot A_ref ] Create a lookup table in sheet "Terrain": While
[ q_p(z) = \frac12 \rho \cdot v_p^2(z) ]
