Before Jason Katwijk began building this deck in Olympia, Wash., he mounted a camera on a nearby treehouse and set it to time-lapse mode to capture the action. The result is a fascinating - and fast-moving - look at all of the steps that Jason and his crew took to create a multi-level deck with virtually no corners. In addition to its curves, the deck features a hot tub, an inlay design, and even a pergola.

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