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roll cages
Posted: Sat Jun 30, 2007 2:25 pm
by rover1
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.
Posted: Sat Jun 30, 2007 2:43 pm
by aussie_stu
searchy searchy,
most common is 32 NB medium wall.
Posted: Sat Jun 30, 2007 2:44 pm
by awill4x4
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.
Posted: Sat Jun 30, 2007 7:11 pm
by short stuff
over kill is better then a sore head
Posted: Sat Jun 30, 2007 7:55 pm
by awill4x4
short stuff wrote:over kill is better then a sore head
I think I'll back my knowledge of cage materials.
Posted: Sat Jun 30, 2007 9:37 pm
by Mouse
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
Posted: Sat Jun 30, 2007 11:55 pm
by Matt N
Posted: Sun Jul 01, 2007 8:57 am
by rover1
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
Posted: Sun Jul 01, 2007 9:24 am
by just cruizin'
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.
Posted: Sun Jul 01, 2007 9:27 am
by rover1
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
Posted: Sun Jul 01, 2007 10:02 am
by Ossie
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
Posted: Sun Jul 01, 2007 11:01 am
by rover1
it will be done right, i hate nothing more than doing things twice..
Posted: Sun Jul 01, 2007 4:29 pm
by beretta
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!
