Office Building Window Vibration

An office building had an open atrium that went from ground level up to the roof. In the center of the atrium was a large flowing fountain. Surrounding the fountain were meeting rooms. Each meeting room had a large plate glass window approximately 8 feet tall and 12 feet wide through which the individuals in the meeting room could view the fountain. The problem was that these large plate glass windows had high levels of vibration. The frequency of the vibration was 240 cycles/minute. The floors and walls were all tested and no significant level of the 240 cpm vibration was [...]