A half-scale prototype of the “Forest Park Pavilion” in St. Louis, the Bamboo Roof is comprised of groups of four boards that are overlapped in a spiraling pin-wheel connection. Different orientations of the overlap result in a change in curvature. This arrangement of pin-wheel connections creates a pattern of large and small squares, and forms a concave or convex geometry resulting in a shell structure or grid shell.
![](https://shigerubanarchitects.com/wp-content/uploads/2022/09/shigeru-ban-bamboo-roof1.jpg)
![](https://shigerubanarchitects.com/wp-content/uploads/2022/09/shigeru-ban-bamboo-roof2.jpg)
![](https://shigerubanarchitects.com/wp-content/uploads/2022/09/shigeru-ban-bamboo-roof5.jpg)
![](https://shigerubanarchitects.com/wp-content/uploads/2022/09/shigeru-ban-bamboo-roof4.jpg)
![](https://shigerubanarchitects.com/wp-content/uploads/2022/09/shigeru-ban-bamboo-roof7.jpg)
![](https://shigerubanarchitects.com/wp-content/uploads/2022/09/shigeru-ban-bamboo-roof6.jpg)