be present on-site during construction. He always said that he learned from the contractor and the construction workers and that what he learned helped him change and improve the design during construction. He also saw new spatial opportunities as the frame of a building rose. Because he was busy with other projects at the same time, he came more and more to rely on his Taliesin apprentices to supervise for him.
Fallingwater is also of cantilever construction, and the projecting slabs are balanced on piers below and stabilized by the vertical masonry planes from which they emerge. They are made of tan finished concrete, and this color sets off the darkness of the voids between them and also contrasts with the tightly packed thin layers of the rough stone courses. The groupings of planes and their intersections creates a rectangular design tha
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