The amazing timber and iron roof construction of the 1979 building of the Aviation Heritage Museum. The longest timber battens are joined (with what looks like 4 bolts) but only towards their ends — it looked like there were some about 12 m long. Both the tin and the timbers are curved, in opposite directions to provide strength.
<a href="//commons.wikimedia.org/wiki/User:Samwilson" title="User:Samwilson">Sam Wilson</a> (taken with <a href="//commons.wikimedia.org/wiki/Category:Taken_with_LG_G6" title="Category:Taken with LG G6">LG G6</a>)
CC BY-SA 2.0
<span class="int-own-work" lang="en">Own work</span> <a rel="nofollow" class="external free" href="https://www.flickr.com/photos/freosam/32732213537/">https://www.flickr.com/photos/freosam/32732213537/</a>