13. Roof Reinforcement:
13.1. Reinforcing the upper part of the rollcage by adding members as shown in Appendix 13 Diagram 19 is permitted.
14. Reinforcement of bends and junctions:
14.1. The reinforcement of the junction between the main rollbar or the front rollbar and the longitudinal members is permitted as shown in Appendix 13 Diagram 21 as is the reinforcement of the top rear bends of the lateral rollbars.
14.2. The ends of these reinforcing tubes must not be more than half-way down or along the members to which they are attached.
15. Windscreen Pillar Reinforcement:
15.1. A tube the upper end of which must be less than 100mm from the junction between the front( lateral) rollbar and the longitudinal( transversal) member and the lower end less than 100mm from the front mounting foot of the front( lateral) rollbar, as shown in Appendix 13 Diagram 68.
15.2. The tube may be bent on condition that it is straight in side view and that the angle of the bend does not exceed 20 °.
15.3. Protective Padding: Where the Driver’ s or Co-Driver’ s bodies or crash helmets could come into contact with the ROPS, non-flammable padding should be provided for protection.
15.4. It is recommended that rollbar / rollcage tubes within 150mm of a vehicle occupant’ s helmet are covered with a suitable energy absorbing material. Suitable materials are Homologated by the FIA who publish specific regulations for the fitment of such materials for Vehicles participating in International Event.
15.5. Removable Members: Should removable members be used in the construction of a ROPS the demountable joints used must comply with an approved type( see Appendix 13 Diagram 30 to 38 and Diagram 46). The screws and bolts must be of adequate diameter and of ISO Standard 8.8 or better. FIA Homologated demountable joints are also permitted.
16. Protective Padding:
16.1. Where the Driver’ s or Co-Driver’ s bodies or crash helmets could come into contact with the ROPS, nonflammable padding should be provided for protection.
16.2. It is recommended that rollbar / rollcage tubes within 150mm of a vehicle occupant’ s helmet are covered with a suitable energy absorbing material. Suitable materials are Homologated by the FIA who publish specific regulations for the fitment of such materials for Vehicles participating in International Event.
17. Removable Members:
17.1. Should removable members be used in the construction of a ROPS the demountable joints used must comply with an approved type( see Appendix 13 Diagram 30 to 38 and Diagram 46). The screws and bolts must be of adequate diameter and of ISO Standard 8.8 or better. FIA Homologated demountable joints are also permitted.
17.2. Demountable joints must not be used as part of a main, front or lateral rollbar because they act as hinges in the principal structure and allow deformation. Their use is solely for attaching members to the rollbars and for attaching a lateral rollbar to a main rollbar( see Appendix 13 Diagram 11). In this last case, hinged joints in Appendix 13 Diagram 30 to 38 and Diagram 46 must not be used.
Motorsport UK 2025 National Competition Rules Version 11
Chapter 7 Appendix 3- Roll Over Protection Systems( ROPS) 254