Like a bit of medieval cosplay sneaking into modern infrastructure work. A tiny reminder that history isn’t just in museums... it's literally hanging off our bridges.
https://en.wikipedia.org/wiki/Topping_out#History the practice of "topping out" a new building can be traced to the ancient Scandinavian religious rite of placing a tree atop a new building to appease the tree-dwelling spirits displaced in its construction... The practice remains common in the United Kingdom and assorted Commonwealth countries such as Australia[7] and Canada,[8] as well as Germany, Austria, Slovenia,…
It seems not:
> A Scandinavian tradition of hoisting a pine tree to the top of framed out buildings had a more functional purpose: when the pine needles fell off, the builders knew the wood frame below had cured/dried out so they could enclose the building.[2]