![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjAWhsCUOBHqYEcLLARD23F6N2y6WcCqrWvgpVLfJ0HqJ52QL3R-6cs2UJaVesoDMsHb3WcNRWtuXl8eQxkj_PfJdWy5FURkEqFlpNNLkVJuJ_cqO2FNv4QXt50wZlFyW0g8coj7w/s400/Regel_Hyperboloid.gif)
This is exactly how the walls of a yurt are put together! The individual long khana pieces are not bent, although it creates a round wall. Compare the 3D surface to the yurt:
![Yurt Frame Raising](http://farm5.static.flickr.com/4070/4255031497_5724567f32.jpg)
The yurt.
On wikipedia, it says that since the hyperboloid shape can be built with straight beams, it allows minimization of wind cross-section while retaining structural integrity with minimal material.
Other structures which are made of the same shape are cooling towers.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg-awZGHHzkXupBtrvWiL6tcXs217Qwkw2dW314YDC3J6Y8caOLUAPWyEPYnKgYGnKoR6f_F3GY1T-4w65MgxXCwYaJ-ps5WK6gxrk7GGlo_CFNiumypHStFw0HWMnlsZGigXivSw/s320/Didcot_power_station_cooling_tower_zootalures.jpg)
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