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="https://commons.wikimedia.org/wiki/File:Roof_interior_at_the_Aviation_Heritage_Museum,_Bull_Creek.jpg" rel="noreferrer nofollow">commons.wikimedia.org/wiki/File:Roof_interior_at_the_Avia...</a>