As the concrete foundation weighs the same as the above-ground structure (6,000 tons), the Needle’s center of gravity is just 5 feet (1.5 m) above ground level, thus making the Space Needle stable during earthquakes.
By: andrewasmith
As the concrete foundation weighs the same as the above-ground structure (6,000 tons), the Needle’s center of gravity is just 5 feet (1.5 m) above ground level, thus making the Space Needle stable during earthquakes.
By: andrewasmith
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