$$v_m(z) = c_r(z) \cdot c_o(z) \cdot v_b$$
The fundamental equation in the Eurocode is: wind load calculation excel sheet eurocode
If a taller building exists upwind, the sheet can calculate increased turbulence and reduction factor for the shorter building. $$v_m(z) = c_r(z) \cdot c_o(z) \cdot v_b$$ The