What thickness of steel do I need for the bottom of my new arch?

[Pibster]

I have the framework of my new arch complete and I was wondering what to use for the bottom of the arch & ramp. It's about 23" between the angle iron and will be supporting a layer of firebrick. I could weld some cross supports if needed. For the sides I was hoping to use some 22 gauge stainless steel screwed to the framework, will this be alright?

[Jec]

I think that will be fine. On my 2x5 they used the same gauge steel on the pans as they did on the arch. They didn't even use any angle. So I think you should be alright. If you really want to you can always put some re enforcers.
Hope this helps,
Joey

[Pibster]

It seems like it would be too thin to carry the weight of the firebrick. I figured the bottom would be around 1/8".

[b116757]

With the frame even 24 gauge would work