Steel Buildings in Europe

Part 3: Actions 3 - 28 b d D E 1 2 Plan h A B C e /5 4/5 e d – e 1 h A B C 1 Elevation for e < d h A B e /5 d – e /5 1 h A B 1 Elevation for e ≥ d 1 Wind direction 2 Elevation h A d 1 h A 1 Elevation for e ≥ 5 d e = min( b ; 2 h ) b is the crosswind dimension Figure 8.3 Key for vertical walls For buildings with h / d > 5, the total wind loading may be determined by the force coefficients c f . In cases where the wind force on building structures is determined by application of the pressure coefficient c pe on windward and leeward side (zones D and E) of the building simultaneously, the lack of correlation of wind pressures between the windward and leeward side may have to be taken into account as follows:  For buildings with h / d ≥ 5, the resulting force is multiplied by 1  For buildings with h / d ≤ 1, the resulting force is multiplied by 0,85  For intermediate values of h / d , linear interpolation may be applied. 8.2.4 External pressure coefficients on roofs Zones for roofs and external coefficients c pe,10 attached to these zones are defined in EN 1991-1-4 as follows:  Flat roofs: Figure 7.6 and Table 7.2  Monopitch roofs: Figure 7.7 and Tables 7.3a and 7.3b  Duopitch roofs: Figure 7.8 and Tables 7.4a and 7.4b  Hipped roofs: Figure 7.9 and Table 7.5