I’m only part of the way there in the build, and not ready to put the roll hoop in place, nor the placement of the cross members. (stick with me – this is leading somewhere).
I’ve got all the steel together for mine in T45 (the proper homologated stuff) which has cost me £50 per metre before bending, and this is at trade prices.
I know I’m doing it right when I see something like this. Click the picture to take you to the website. It’s made from plumbing pipe and has been screwed to the floor with self-tappers.