Garage19

What diameter tube are roll cages normally made from?

Thinking about knocking up a quick one for the track car.

I know they should be made in CDS but depending on the cost difference i might just use ERW. The way i see it is its only a track car (no fia approval needed) and any roll cage is better than no cage!

Phil

iTrader: (1)

It should be detailed in the Blue book somewhere. There are different thickness requirements for the main hoop etc.

Garage19

Ah, I haven't got the blue book.

So the main hoop is normally thicker wall?

Phil

iTrader: (1)

SOrry I meant bigger diameter Not sure about thickness!

NUTS RuS

iTrader: (35)

Aaahhh good old section Q of the Blue Book

45 x 2.5 or 50 x 2.0

350N / mm˛

Please DO NOT use ERW tubing.

Garage19

Is that for the main hoop or all tubes??

NUTS RuS

iTrader: (35)

Thats a minimum spec

50mm for the main hoop, 45 for the supports.

dave cos4x4

iTrader: (5)

whats CDS and ERW.

Got half a roll cage for the mk.2 but want to do a full cage with plenty of strengtheners in it.

price /metre please too.

NUTS RuS

iTrader: (35)

CDS is cold drawn seamless (has no edges welds or seams)

ERW or Electric Resistance Welded is flat sheet rolled into tubes with a welded seam.

dave cos4x4

iTrader: (5)

ah..thanks Tony.