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Glossary



Can I use the roll bar as anchorage points for my seatbelts?

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Views: 3028
Votes: 0
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Posted: 19 Feb, 2008
by: Madabout-Kitcars ..
Updated: 19 Feb, 2008
by: Madabout-Kitcars ..
You can but this will be inspected in detail by the examiner. The examiner will follow these points to determine if the anchorage points are suitable.
 
rollcage seatbelt mounting points
 
What to look for:
 
• Triangulation and bracing which will provide strength and spread the loads effectively into
the chassis.
• The joint where the roll cage joins the chassis and the chassis itself must be sufficiently
strong to withstand the loads from the anchorages.
• Upper anchorage must be adequately braced from near the anchorage to strong areas of
the chassis.
• Threaded seatbelt anchorage fastening should be welded into tubes or onto plates of
sufficient thickness.
• Bolted joints joining the cage to the chassis and parts of the cage to each other should be
of sufficient strength.
 
Note: For guidance roll cages should ideally be manufactured of COS steel tube dia 45mm x
2.5mm wall thickness OR dia 50mm x 2.0mm wall thickness. Bend radii should exceed 3 times the tube diameter. Where tubes are ovalised during bending, the ratio diD should not be less than 0.9 (d=small diameter, D=Iarger diameter).
 
Cause for concern:
 
• Roll cage manufactured using aluminium.
• Poor bolted joints, or joints that could separate due to loads in anchorages.
• Insufficient bracing or bracing to upper anchorage too low.
• Roll cage material cracked or badly creased.
• Cage-to-chassis mounting plates of smaller thickness than cage wall thickness.
• Cage not attached to chassis, or insufficient joint strength.
Others in this Category
document Do I need to fit an anti-theft device to my kit car?
document What are the minimum seat belt anchorage points needed?
document Where should I anchor my seatbelts?
document Do the seat belts themselves need an approval rating to pass?
document There is some slack on my inertia reel seatbelt, is this ok?
document The seatbelt is rubbing against another part of the car. Does this matter?
document What are acceptable anchorage points for seatbelts on monocoque chassis?
document What are acceptable anchorage points for seatbelts on steel tube chassis?
document Can I fit an airbag?
document Can I fit a TV or DVD player to my car?


All the SVA information supplied on Madabout-Kitcars.com is done so on a "best efforts" basis and is meant as an informal guide only. We do no warrant or guarantee the information supplied due to the way SVA guidelines can be interpreted from test centre to test centre and because of changes in SVA guidelines by VOSA that we are not made aware of. It is up to you to satisfy yourself on any aspect of your build and SVA by researching the subject, contacting your kit car manufacturer, VOSA or getting hold of the SVA guide from VOSA and making an informed decision based on those factors.


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