A 32mm gauge Austrian Garden Railway

[HarryW]

What Drew said.

It'd be a bit of work, but what about pop-riveting aluminium strips to the steel beam? It would certainly bear any weather.

I did buy a pop rivet gun recently for this, I considered using steel angle so it would rust like the girder. Aluminium might be a better option but I’d probably have to paint to match the girder/ or paint everything a new colour