Fire Safety Science Digital Archive

The wind induced pressures on a roof may reduce the efficiency of a pressurization system. A simple model building was used to determine the pressure coefficients on the roof surface for several wind directions with and without a parapet. The model was placed in an open jet wind tunnel for the measurement of pressure and the observation of flow(s). Pressure coefficient contours are presented and the results indicate the possibility of a complete failure for both positive and negative induced wind pressures.