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discovery roll cage / space frame


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hi all quick couple of questions

im building a internal roll cage out of 2'' tubing what thickness wall should i be using? ill be using cds steel tubing.?

also im making a frame for coil over suspension out of 1 and 1/2'' cds tubing again what thickness is recommended for this?

cheers

chris

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Basically there is only one drawback to using a thick walled tube, and that is weight. In all other aspects its much nicer to work with as its easier to get good bends, easier to weld gaps in your notching and generally easier to weld without blowing through. Also it doesn't dent nearly as easy, meaning you can have roll and still be able to use it. Provided the construction is strong enough of course

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44mm x 2.64mm is minimum I believe.

So at 2" and maybe 3.2mm you will be well over specced, and nothing wrong with that.

For the protection tubes, well, depends how hard you intend on hitting things :)

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44mm x 2.64mm is minimum I believe.

So at 2" and maybe 3.2mm you will be well over specced, and nothing wrong with that.

For the protection tubes, well, depends how hard you intend on hitting things :)

thats great thanks guys, is the 44mm tube for roll cage use or coil over frame work?

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  • 1 month later...

thats great thanks guys, is the 44mm tube for roll cage use or coil over frame work?

44mm tubing is not MSA approved for cross country events. You do not need to use CDS for cross country events as pipe to EN10255 ('blue band') is allowed. The key advantage of going to CDS is the increased material strength allows a thinner wall thickness to achieve equivalent strength with a the consequent weight reduction. Unless you are going for speed events, this probably not a key consideration.

The pipe allowed has the following dimensions for mandatory members: 42.3x3.2mm for vehicles below 1000kg and 48.3x3.2 for vehicles above 1000kg. The cage needs to be made to an approved design (as per the blue book) and optional members can be of 30x3.2mm pipe.

Hope this helps and you haven't already started. As said previously, the cage needs to be done properly if it is to perform as designed in the event of a roll.

Cheers, Toby

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