Roll Cage

[quadfather]

it also depends on what type of mild steel you use most companys use c.r.e.w.(cold roll elec weld) or h.r.e.w. hot roll elec weld , to keep the price down theese types of mild steel tend to vary in wall thickness alot .thats why they use .134 wall to meet the .118 min. I would recomend that you use d.o.m. tubing instead . it does cost a bit more, but is formed to much tighter tollerances. and you could get away with .120 wall if wanted to save a little weight. ive been using d.o.m. tubing at my shop for a long time now, and have never had a problem passing cert. with it . plus it bends much nicer than the the cheaper tubing. and it wont collapse as easilly in the bends. www.markowracecars.com