So even though John admits that future built cages should use something stronger than ERW and it is very obvious that the seam is weaker, you still NEED to see a picture to admit that ERW is a bad choice?KevinGale wrote:jkale wrote:It is a good example to show everyone what exactly we are talking about. The failure of the seam on an erw pipe.
I'd have to dispute that. It's not really a good example. I'm interested in crash failures in a decently constructed roll cage using a good material that happens to be ERW. And even then it would need to be clear that the failure was because of the seam. Hard to find probably, but in a way that is the point. It's not at all clear that this is a danger that makes it worth excluding existing cages.
Maybe we can suck it up and build a cage structure here at the shop from ERW and see what happens when it gets crushed...