Roll Hoop Back stays and cross brace.

[twinturbo]

Do the Roll hoop back stays and cross brace have to be made from CDS?

I will be mounting my seatbelts lower down towords the diff area and not on the cross brace.

Anyone got a good site for cutting templates for round rube?

Cheers

TT

[cornishmaid]

You would be better to mount the belts to the top chassis rail rather than down inside the boot area.

[twinturbo]

They will be mounted at an appropriate location that does not require protection for MR IVA. Top rail or lower will be worked out at a later date.

My belts have a long single atatchement so I have a lot of variance on where they can go.

Cheers

TT

[flyerncle]

No requirement for roll bar so mounts should comply with IVA requirements.

[ozzy1]

My belts have a long single atatchement so I have a lot of variance on where they can go.
Do they not have to be above your shoulder height?

Tubemitre was a program a lot of people have mentioned previous.Dunno if its relevent for what you want though.

[twinturbo]

the cros brace will be above shoulder height with the belts running over them. The location point will be elsewhere.

TT

[John.W]

Does the roll bar have to be made out of round bar or can it be made out of 3 pieces of 50 x 50 box tube cut and welded to form the U shape?

[brainbug007]

Personally I used CDS as I found it easier to source off ebay than ERW that had thick enough walls (3mm+). I got 2.8m for about 30 quid including delivery which didn't seem that bad and would cover the braces and cross section. I would think making it out of 50x50 would be a bad idea as surely the welds wont be strong enough to hold in the event or a roll?

[HandyAndy]

Do they not have to be above your shoulder height?



Thats a good point to raise, & easily overlooked,

I,m not sure of the precise wording in the IVA manual but the belts/harness are not supposed to pull directly downwards from the shoulder, as it may be possible in an impact that the force of the impact could break your collar bones .

Sounds like TT has this covered tho by having the webbing of the harness running over the top of the roll bar center brace :cool:

Thats the reason I waited until I had my seats before welding the center brace into position so that I could get the seat/shoulder/brace bar height to the correct position.

cheers
andy

[cornishmaid]

Surely having the belt so close to moving parts like the drive shafts is rather dangerous? Ours are fitted to the top rail and are rather expensive willans belts.

[loony]

There are proper angles to mount harness...
http://images29.fotosik.pl/295/706fa785b955701c.jpg
http://images28.fotosik.pl/296/20b473a38d6455d2.jpg
It's like FIA rules or something... so I think IVA/SVA rules should be similar...

[cornishmaid]

Ours are not mounted on the roll bar they are mounted on the top chassis tube, most cars of this type are done this way.

CM

[cornishmaid]

Mount them to the chassis rather than the roll over bar. Have a look at Westfield etc as these are all done like that.
We have Triton seats fitted and Mark drew up a quick how to do it guide for mounting the belts on the chassis for us.

CM

[flyerncle]

Ginetta ones are fitted to top seat back rail with a weld only and no mounting bracket