A structure 40 m high has a sway caused by the vibration of the equipment installed on it. Operational personnel have to visit the various levels on the structure during a day. Personnel have expressed discomfort from a feeling of insecurity from the structural sway of about 10 to 15 mm at the top. Is there any norm that draws a line on such an aspect. The structure is otherwise safe from the point of loading and structure section sizes.
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