roll cages

Post by **rover1** » Sat Jun 30, 2007 2:25 pm

what material do you use to make roll cages out of. (dont say pipe or tube)

i want to put an internal cage into my gq ute, i was thinking 48.5mm O/D with 4mm wall, heavy wall pipe, is that too much, i want to keep weight down as much as i can without having to use cromoly.

i can get whatever steel i need through work, but want to use the right stuff first time, no need for overkill.

Post by **aussie_stu** » Sat Jun 30, 2007 2:43 pm

searchy searchy,

most common is 32 NB medium wall.

Post by **awill4x4** » Sat Jun 30, 2007 2:44 pm

Most of the tubing we have supplied has been 1 3/4" (44.5mm) by .102" (2.6mm) wall thickness CDW cold drawn tubing.
I think the sizing your looking at will be a bit of an overkill.
Regards Andrew.

Post by **short stuff** » Sat Jun 30, 2007 7:11 pm

over kill is better then a sore head

Post by **awill4x4** » Sat Jun 30, 2007 7:55 pm

short stuff wrote:over kill is better then a sore head

I think I'll back my knowledge of cage materials.

Post by **Mouse** » Sat Jun 30, 2007 9:37 pm

If you plan to use it in comps then you will need to comply with CAMS standards that CCDA impose meaning minimum requirement is 44.5mm cdw 2.5mm seamless tube. A thicker walled seamed pipe or tube is weaker as the seam can split in an accident

Post by **Matt N** » Sat Jun 30, 2007 11:55 pm

http://www.racetechsteel.com/products.htm

Post by **rover1** » Sun Jul 01, 2007 8:57 am

when the cage is installed and you rock up to a comp, how do they check what material you have used? not being a smart arse, but just wanting to know, do you have to supply photos of the building of the cage or an outcut of the tube or do they they just take your word

Post by **just cruizin'** » Sun Jul 01, 2007 9:24 am

Seem tube you can see the seem from the outside, even after painting (most of the time). Bite the bullet and do it properly if you intend to compete. Better to build one good once rather then two, one the passes and one that doesn't.

Post by **rover1** » Sun Jul 01, 2007 9:27 am

maybe i should of looked at the ccda website first.

5.4 MATERIAL SPECIFICATIONS
All tubing used in roll bar protection structures shall be circular section cold drawn steel tube (CDS,
CDW or CEW) with properties as shown in the following tables.

Composition Property Specification

Carbon Content 0.3% max.
Magnese content 1.0% max.
Other alloy content 0.5% max.

Tensile strength 350 Mpa min.

Minimum dimensions

Component. Outside Diameter Wall Thickness

Main Hoop
44.45mm 2.5mm
50.00mm 2.0mm

All other Components
38mm 2.5mm
40mm 2.0mm

Post by **Ossie** » Sun Jul 01, 2007 10:02 am

rover1 wrote:when the cage is installed and you rock up to a comp, how do they check what material you have used? not being a smart arse, but just wanting to know, do you have to supply photos of the building of the cage or an outcut of the tube or do they they just take your word

That is correct and scrutineerrs may not have the technical skills to determine if a cage is correct. That is why cages for CCDA events are supposed to be certified, as part of the logbook allocation, a roll cage certification bnumber is stiuck to the cage to determine that it has been appropriately certified.

It pays to do it right the first time.

Jason

Post by **rover1** » Sun Jul 01, 2007 11:01 am

it will be done right, i hate nothing more than doing things twice..

Post by **beretta** » Sun Jul 01, 2007 4:29 pm

rover1 wrote:it will be done right, i hate nothing more than doing things twice..

And you only live once apparently, so worth doing right the first go!

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