All seat belt mounting holes and mounting plate holes must be clearance drilled to a professional standard. All mounting plate holes to be a greater distance than 25mm from plate edge. (u) Eyebolts: Where eyebolts are used, eyebolt must be fully into mounting, no back spacers permitted. The angle of approach to the webbing must be in line with the eye bolt ring. (Fig. 1) (v) The shoulder straps must be directed towards the rear, directed downwards with an angle of between 1 (one) degree and 10 (ten) degrees to the horizontal from the top of the shoulder (Fig 2). (w) The belts must be anchored within 250mm of the back of the seat or pass through guides within 250mm of the back of the seat. The mounting points or guides must be no more than 150mm apart with their centre point 90 degrees to the seat back. Where the shoulder straps pass through the seat, the edges must be rolled or have grommets fitted to prevent chaffing or cutting of the strap material.
Check the entire harness for chaffing, stitch damage or hardware corrosion. Under no circumstances can cutting and resewing of webbing or modifications to hardware be permitted. (y) Two belts joining in a 'Y' behind the neck to form one strap are not permitted. Butler, Britax and other automotive safety harnesses, where shoulder belts are only looped around lap belts and fastened by a seat belt buckle are not permitted. (z) Safety harness to have date of manufacture visible to vehicle checker. This date to be recorded on vehicle green sheet. (aa) All harness webbing be renewed after five (5) years from date of manufacturer or earlier at the discretion of the vehicle checker. (ab) Safety Harness webbing, mounting points and release mechanism must be inspected for condition and fit at every green sheet inspection and before a race meeting by class vehicle checker. T11-6-2 Method of Application (a) First tighten the lap seat belt, be certain that it comes across the pelvic area. (b) Adjust crutch belt with light tension on centre buckle assembly. (c) Tighten the shoulder harness to the desired tension. (d) Be certain that all mounting buckles are in alignment.
2010 ELECTRONIC RULEBOOK
Published on Jul 10, 2010