Roll bar / harness mount Question

[londonsean69]

Bit of a petty one this, but thought I would ask.

In the book, the drawing showing the roll bar construction (pg53) has the harness brackets shown pointing backwards.

However, in the photos on Pg123, they are pointing forwards (also a slightly different design).

Does it matter which way they point?

Cheers

Sean

[HandyAndy]

my own opinion on this is down to personal preference tho i,m sure there might be rules to some degree,
i,m actually fitting the upper harness mounts into the cross brace, actually drilled into the brace & welded top & bottom, this i believe removes any radius/projection concerns.

andy

[londonsean69]

Andy, what sort of harnesses are you looking at using? Bolt in or clip in??

I like the idea of 6 point harnesses, and can only seem to find them in clip in, which could be a pain come SVA time, so I may have to just use 4 point till post SVA

Sean

[HandyAndy]

now you,ve got me worried

my harnesses are Willan,s four point which are bolt in for the lap belts but are clip in for the upper mounts, are you saying that the clip in type are not going to pass IVA ? i,ve not heard that this would cause a fail ???

the upper mounts clip onto the bolts that have a ring on the top which would be welded into my roll bar cross brace.

cheers
andy

[londonsean69]

Don't panic - I'm just not sure how the tester would look upon eye bolts poking out, but then again, the radius is certainly legit.

It just seems it is easier to get covers for the normal type, that bolt on.

As for welding the rings into the roll bar, I still intend to use the 7/16 threaded bar from the book, then screw the eye bolt into that. Apparently it's a fail if they can't see the ends of the bolt ie. it must project through the entire bracket

I must also say that I have not actually looked at a harness properly yet. I didn't realise that they only clipped in at the top, although it would make sense (I assume the clips are so someone can be extracted) because screwing eye bolts in between seats etc. would be a PITA

Sean

[AshG]

i did mine like this as it removes a radius that has to be covered

[HandyAndy]

Ash, great pics, what you have done is what i intend doing but maybe didn,t describe it very well

would then bolt the "eye" into the bosses that are weled into the cross brace.

a pic tells a thousand words , cheers Ash

andy

[londonsean69]

So am I right in thinking then, that the brackets as shown in the book would fail IVA/SVA because they are classed as a projection?

Isn't there some rule about things behind you?

Sean

[AshG]

they are fine as book spec but you will have to put edge trim on them to pass the radius test. doing it as shown in the pictures above just means 4 less bits to cover up. it also looks better.

[londonsean69]

Originally Posted by AshG

they are fine as book spec but you will have to put edge trim on them to pass the radius test. doing it as shown in the pictures above just means 4 less bits to cover up. it also looks better.

Fair points, although I have already made my harness mounts, I may remake them the way you have them shown. It certainly looks neater

Sean