ii.
Optional tubular members 38 x 2.5( 1.5” x 0.095”) or 40 x 2.0( 1.6” x 0.083”).
20.2. In selecting the steel, attention must be paid to obtaining good elongation properties and adequate weldability.
20.3. The tubing must be bent by a cold working process and the centreline bend radius must be at least three times the tube diameter. If the tubing is ovalised during bending, the ratio of minor to major diameter must be 0.9 or greater.
21. Exceptions
21.1. The only exceptions to the foregoing requirements for Saloon, Single Seater and Sports Cars are as follows:
21.2. ROPS manufacturers may make application to the ASN for a Roll Over Protection System( ROPS) Certificate to be issued.
21.3. Note: ROPS manufacturers wishing to make application for such a certificate should contact the ASN Technical Department in order to obtain details of the requirements to be met and the fees payable. Subject to these requirements being met a ROPS Certificate will be raised and issued. Duly authorised copies of this certificate containing a drawing, photographs, a copy of the manufacturers declaration that the ROPS meets the required regulations should be available to Event Scrutineers.
21.4. Each ROPS manufactured after 1.1.97 for which the ASN or the FIA has issued a ROPS( Rollcage) Certificate must bear an identification plate which details the manufacturer and the manufacturer’ s part number allocated to the cage. Details of this identity plate are to be included on the ROPS( Rollcage) Certificate.
Vehicle Categories Covered 22. Series Production, Touring and Sports Cars.
Material
22.1. Production Cars, Touring Cars, Sports cars up to 2,000cc – Basic rollbar / rollcage complying with App. 13 Diagram 10 or 11
22.2. Production Cars and Touring Cars over 2,000cc – Rollbar / rollcage complying with App. 13 Diagram 12 or 13.
22.3. Sports Cars over 2,000cc – Rollbar / rollcage complying with Appendix. 13 Diagram 12 or 13 or 64. a & 64. b and Diagram 47.
22.4. The different possibilities of installing the optional reinforcing members to the rollcage are shown in App. 13 Diagram 16 to 21.
22.5. Each type of reinforcement( App. 13 Diagram 16 to 21) may be used separately or combined with one or several others).
22.6. These reinforcements can be installed in each of the basic rollcages( Appendix. 13 Diagram 10 to 13).
22.7. As defined in Art. 20.
22.8. Note: For all the ROPS which are FIA Homologated after 1.1.2000 for Touring Cars the presence of the ROPS in the door aperture must comply with the following criteria( see App. 13 Diagram 63 in this section).
22.9. Dimension A must be a minimum of 300mm. 22.10. Dimension B must be a maximum of 250mm. 22.11. Dimension C must be a maximum of 300mm.
22.12. Dimension D( Measured from the upper corner of the windscreen, without the seal) must be a maximum of 100mm.
Motorsport UK National Competition Rules 2026 Edition 1
Chapter 7 Appendix 3- Roll Over Protection Systems( ROPS) 264