Here are some different designs of St Andrews Cross that are collapsible to be easily stored and transported, as well as some nice inspiration.
I really need to learn to weld, this is awesome and this is the one that I want…..


Hmmmmm would theatrical hinges be of any use? These come with a removable pin for disassembly.

I prefer the idea of the cross unfolding rather than being pieced together.
Strap hinges are going to be useful!


