Why this mountain bike center is built of Brettstapel, and why North American builders should be using this stuff

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Brettstapel is a method of making massive wood panels out of smaller pieces of wood, resulting in large panels that can be used as structural walls and slabs, much like Cross-Laminated-Timber (CLT). The use of CLT or other massive wood technologies can help substitute renewable wood for concrete, which has a very high carbon footprint, in many projects.

However, unlike CLT, Brettstapel doesn't need million dollar presses and a lot of glue holding everything together. It's much simpler; In this case, local Welsh wood (there is a lot of it) is sustainably harvested and milled into this shape which interlocks.

More on the benefits of CLT in TreeHugger:
Cross Laminated Timber is Ready for Prime Time
Cross Laminated Timber Comes To America And The New York Times Is On It