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"To limit
the swings of a building...engineers have invented an ingenious
device, called a tuned mass damper, that reduces the oscillations
of a building without increasing its weight substantially." p.69
The Art of Construction
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"The
Citicorp Center building in New York has a 400-ton damper at its
top "feed back driven" and it is the first high-rise building
so wind-damped in New York." p.70 The Art of Construction

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