Naw, all of you suggesting all that is needed is a small air gap are completely wrong.... sorry for the accusation.
Upjeepers is exactly right, he definitely needs to make it out of angle iron because of the latent fire damage when the UDS is unsupervised during the run to the refrig for more refreshments.
I managed to convince my wife that I needed a welder using the same logic that I needed to build something….. forget what it was, but I’m sure it was important at the time…. Ujeeprs, you definitely need a plasma torch, cutting the steel with the band saw, angle grinder, hacksaw, or chop saw is NOT the best way.
– Ujeepers, if you need any support please let me know!!