Just getting quotes for the steel what is the round tube? 19mm what?
Been offered 304?

304 is a stainless steel grade

Just googled that, what do I need? (For the diagonals)

Just normal erw tube should be fine. Not stainless.

[Edited on 30/5/07 by Howlor]

Thanks.

You can use the normal 25mm box section for the diagonals with a very small weight penalty.

True about the minimal weight penalty, I will see the prices, my local supplier didn't have round in stock
By the way I did a search but couldn't find the grade we should be using. Am I correct in thinking it is S275 J2H?

[Edited on 31/5/07 by clockwork]