Abstract
Wind tunnel tests were conducted with a view to establishing the desirable levels of friction to be used in side-lung casement windows restrained by friction hinges. The flow of air through the window opening had considerable effect on the moments. It is suggested that low hinge friction is a better design policy than high friction, thereby ensuring that window movement is more likely at low wind speeds, leading to lower slamming speeds. Windows should desirably be self-latching.
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