Correction for the weight of a Grand Piano
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How heavy is 18,400 ounces?
It's about one-and-one-fifth times as heavy as a Grand Piano
The weight of a Grand Piano is about 16,000 ounces.
(for Steinway & Sons, Model D Concert Grand Piano)
A Grand Piano, of the kind used for concert performances in large music halls, weighs 16,000 ounces. Well-made pianos such as this may last 75 to 100 years.