Fallingwater has turned 75. Which is pretty amazing considering that the thing probably should’ve keeled over ages ago. Frank Lloyd Wright’s photogenic masterpiece was a structural catastrophe. Even before the client, Pittsburgh businessman Edgar Kaufmann, had a chance to move in, the famed cantilevered concrete balconies betrayed evidence of deflection. By the 1990s, the place had aged so badly, its sagging terraces were sorely obvious and cracks veined the parapet beams. Tests showed that the concrete was stressed to 95% of its failure strength.
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