Installed a Harness

magoo
Learner Driver
Posts: 36
Joined: Thu Aug 18, 2016 3:04 pm

Installed a Harness

Postby magoo » Sun Sep 11, 2016 9:04 pm

Today I installed a 5 point harness into my gc8 and thought I'd show a few picks and ask here if people think it should pass scrutineering
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I made some rear mounts up using 2 pieces of 35mm x 3mm plate 160mm long. I drilled holes in them 100mm apart and then welded 2 nuts in line with the holes on one of the pieces of plate. Then I placed the piece of plate with the nuts on it, inside the box section part of the parcel shelf just behind the rear seat, and the other piece of plate on the out side of the box section, creating a parcel shelf sandwich.
I wanted to extend the attachment point outside of the boot so the straps couldn't rub on any sharp edges . So I used a couple linkage arms. I had to lower the linkage arms to clear the seat surround, so I made up two 10mm spacers and then bolted both up tight with a couple of high tensile bolts.
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on the left side of the seat I used the rear anchor point of the front seat and used a longer high tensile bolt to allow for the extra length needed.
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For the other side I used the seat belt anchor point and again used a longer bolt with a spacer between both seat belt anchors.
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At the moment I only have the standard seat so there is no hole for the crotch strap, so I ran the strap up the front of the seat and bolted it through the boxed member under the front seat. I used a piece of flat plate on each side of the box member for strength.
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As you can see I should of also vacuumed the car while I was at it.. :)

magoo
Learner Driver
Posts: 36
Joined: Thu Aug 18, 2016 3:04 pm

Re: Installed a Harness

Postby magoo » Mon Sep 12, 2016 7:04 am

Not sure why the pictures aren't working with tapatalk. Here they are again.
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blackrex
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Re: Installed a Harness

Postby blackrex » Mon Sep 12, 2016 1:21 pm

Putting my CAMS Scrutineers hat on, i would fail the upper mounts on that car if they where presented to me in that manner.

- The parcel shelf is not designed for the loads that you are wanting to put through it.

- You have the bolts attaching the plates to the parcel shelf in single shear on an extension, that will add twisting force into the mount.

- The spherical bearings are mounted in tension, typically their weakest load path.

- Where you have attached the seat belt straps to the spherical bearings, you have them in single shear, as well as being mounted in a moving bearing. There is also no twist protection in place to stop the spherical bearings from loosening other time. You also haven't used locknuts to secure the belts.
"The problem with socialism is that you eventually run out of other peoples money." Margaret Thatcher.

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magoo
Learner Driver
Posts: 36
Joined: Thu Aug 18, 2016 3:04 pm

Re: Installed a Harness

Postby magoo » Mon Sep 12, 2016 3:43 pm

Thank for the feed back and all makes sense.
I mounted them to the cross member of the parcel shelf after reading around that if plate was used inside and outside of the member then the anchor points are ok, but sounds like not the case.
I know I either need a roll bar or harness bar for best results but they will need to wait. I'm not keen on attaching them to the rear seat belt anchors as the angle is pulling down on the spine.
I'll have another go tonight and see what I come up with.
Thanks very much for the feedback it's much appreciated


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