The external pressure coefficients cpe for buildings and parts of buildings depend on the size of the loaded area A, which is the area of the structure, that produces the wind action in the section to be calculated. The external pressure coefficients are given for loaded areas A of 1 m2 and 10m2 in the tables for the appropriate building configurations as cpe,1 , for local coefficients, and cpe,10, for overall coefficients, respectively. Values for cpe,10 are intended for the design of structure with an area of 10 m2 or more. In ideCAD Software, cpe,10 coefficients are used.