Frank Lloyd Wright pushed the limitations of technology with his buildings, sometimes pushing past them and bequeathing problems to future stewards. Fallingwater, the Edgar J. Kaufmann Sr. residence completed in 1939, required a major restoration in 2002. The house’s dramatic cantilevers had deflected dangerously with the main cantilever sagging an alarming seven inches. The restoration team, including structural engineer Robert Silman Associates (RSA) and architect WASA/Studio A were able to halt, but not correct, the deflection with post-tensioning cables—a solution as innovative as Wright’s design.
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