Wind loads on the roof of a 6 m cube

The pressures on the roof of a 6 m cube in open country are considered. These show significant similarities between the instantaneous pressure distribution during an extreme event and the mean distributions. High local suctions are observed during oblique flows but for larger areas the design load may occur during more orthogonal flows since the flow is more highly correlated. It is shown that while quasi-steady methods may fail to predict local short duration suction peaks, the approach is effective in predicting the pressures on even moderately small areas of the order of 3% of the total roof area.