180 M.Majowiecki 1o" Fig.8.Spectral density of the longi- Fig.9.Integral length scale at differ- tudinal component of the wind veloc- ent levels(“fitting”with Von Karman ity(“fitting'”with Von Karman spectral spectral density) density) Fig.10.Circle which identifies the location of the buildings included in the model The roofing has been equipped with 252 pressure taps,of which 126 at the extrados and 126 at the intrados.in order to get the net pressures on the roofing.In the model the roofing of the stadium (Fig.12)has a box structure in order to allow for the settlement of the pressure taps inside.A minimum thickness of about 7 mm has been required for the roofing structure to allow for the insertion of the pneumatic180 M. Majowiecki Fig. 8. Spectral density of the longi￾tudinal component of the wind veloc￾ity (“fitting” with Von Karm´an spectral density) Fig. 9. Integral length scale at differ￾ent levels (“fitting” with Von Karm´an spectral density) Fig. 10. Circle which identifies the location of the buildings included in the model The roofing has been equipped with 252 pressure taps, of which 126 at the extrados and 126 at the intrados, in order to get the net pressures on the roofing. In the model the roofing of the stadium (Fig. 12) has a box structure in order to allow for the settlement of the pressure taps inside. A minimum thickness of about 7 mm has been required for the roofing structure to allow for the insertion of the pneumatic 10-1 100 101 102 103 10 -2 10 -1 100 15 20 25 30 35 0 10 20 30 40 50 60 70 80 90