theduck
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| posted on 21/5/13 at 09:39 PM |
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Strengthen roll bar mountings advice needed
Currently my "roll bar" is really more cosmetic than structural, but as I need to add a bar to run my harnesses over (to raise effective
anchorage point) I need to strengthen the mounting points to make it a structural component and so keep IVA man happy.
Rear mounts look like this
With these I intend to move the mount below the existing brace for the harness mounts as this should provide sufficient load spreading, I think...
30mm x 4mm x 880mm
What I am stuck with is the front leg mounts which currently look as below, I hasten to add this not my handy work and something I have never really
been happy with
Thoughts on this so far are to add a load spreading plate (5mm thick and 200x100mm) on the otherside directly opposite from where this photo was taken
as use the existing unused hole and drill a second In between the two horizontal bolts to add strength there, but not sure what to do about the wooden
wedge an those bolts? I don't have the ability or tooling to make up a metal replacement which would seem the ideal Option?
Last of all, how would you go about adding the required bar to this roll bar?
Could I simply get a suitable piece of tube and bolt it between the front two legs or would I need to get it welded in?
Thanks in advance
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theprisioner
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| posted on 22/5/13 at 12:04 PM |
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It is my understanding all fixing points need to be on the chassis and that design of bar you need to consider if it needs to be diagonally cross
braced. I say this as the diameter of that tube looks a bit lean not to mention the gauge of metal which I have no knowledge of.
http://sylvabuild.blogspot.com/
http://austin7special.blogspot.co.uk/
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theduck
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| posted on 22/5/13 at 12:13 PM |
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It's a monocoque chassis, so it is bolted to the chassis, but I fully appreciate it would need reinforcing. I could add a diagonal brace at the
same Time if required.
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theduck
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| posted on 23/5/13 at 01:33 PM |
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Any more thoughts on this? The more I think about it the mor I think I need to add load spreading on the underside of the front legs, only problem
beeping I have no idea how to access that area.
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matt_claydon
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| posted on 23/5/13 at 03:49 PM |
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What thickness is the material of the bar you've got? To be blunt, it looks like such a terrible design/fitment that it can only have been
intended as cosmetic, so it seems highly unlikely it's thick enough to be structural.
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theduck
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| posted on 23/5/13 at 04:31 PM |
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Honestly don't know material thickness for the bar.
Any other suggestions for how to raise the effective achorage point then?
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