Vehicle & Technical > Defender

Defender 90 Truck Cab Rollcage? DIY?

<< < (3/4) > >>

Wolfie:

--- Quote from: "rollazuki" ---'Ere we go again, anyone know the specs for scaffold, or blueband tubing????????????????/
--- End quote ---


http://www.temporaryworks.info/bsicen.htm provides the following information :"BS EN 39:2001 Loose steel tube for tube and coupler scaffolds.
This standard introduced for the first time in the UK the thin walled (3.2mm thickness) scaffold tube as a British Standard scaffold tube.
The BS EN 39 gives details of both Type 3 (3.2mm) and Type 4 (4mm) tube and has the significant technical change that “tubes will now be supplied galvanised, unless ordered otherwise”. It increases the yield stress of tube to 235 N/mm² 18pp ISBN No: 0 580 37960 4"

The "Blue Book" (the MSA one, not the other one  :)  ) states the minimum Yield Strength for tube used for a roll bar is 350 N/mm².

It's up to you, but I know what I want above my head on the weekend of 8th April when I'll be learning how to drive a LR fast off road.

Regards

Wolfie

rollazuki:
Thanks wolfie, Ive searched high and low for the metal stats.

Finally looks like the scaffold is slightly lower spec.
Its cheap enough to buy pipe from a steel stockholders in the right spec tho, so amateur cage builders shouldnt be put off.

I still stand by what I said tho, that a cage made from scaffold would be tougher than an ally Landy roof.

Most folk arent going to hit high speed off road, but even if they were, what would you prefer, ally roof, or scaffold?

Sensible advice is buy expensive cage, If you dont have the cash, Id go home build.

Eeyore:

--- Quote from: "rollazuki" ---
I still stand by what I said tho, that a cage made from scaffold would be tougher than an ally Landy roof.

Most folk arent going to hit high speed off road, but even if they were, what would you prefer, ally roof, or scaffold?
Sensible advice is buy expensive cage, If you dont have the cash, Id go home build.
--- End quote ---


Oh, I don't think anyone is critising the concept of home build - under the caveat that someone is capable of good welding - just that if you do, use the right materials.

cheers
 8)
Eeyore

Henry Webster:
Excellent, I am glad to see that this is becoming an educated debate.  I am not qualified to talk about steel specs so I won't, but I have seen enough rolled vehicles to have an opinion on roll cage design and build.

Rollazuki - you say:
--- Quote from: "rollazuki" ---Most folk arent going to hit high speed off road, but even if they were, what would you prefer, ally roof, or scaffold?
--- End quote ---


Agreed, but if you look at the example highlighted above you can see that you can have a BIG accident at low speeds.  This accident took place on a play day and from what I know started out from near standstill.

http://www.olrg.org.uk/daan_off/1.html

There is much more to cage design than purely materials and good quality welding.  Deformability is built into rally cages (where the liklihood is for a high speed accident) but not necessarily into your average challenge/ trial cage.

Cages are difficult things to get right for the amateur - I know, we've tried - and I think it is usually worth buying in some expertise.  Additionally if you are going to the lengths of installing a roll cage why not build it to MSA specs, which opens the possiblilty out to entering comeptitions.  It might help resale values if it is to competition spec and someone else has done the hard work of researching the sensible specs for building.

H

bigant:
i get my mate martin to make my cages hes a welder so they dont fall apart dont know what type of steal he use's i'll have to ask him but we managed to test one of his cages well when a landy droped down a 20 foot cliff and landed on its roof the engine fell off its mounts but the cage held up over enginering ftw :)

Navigation

[0] Message Index

[#] Next page

[*] Previous page