CHAPTER 7 COMPETITIOR VEHICLES AND VEHICLE SAFETY EQUIPMENT Appendix 3- Roll Over Protection Systems( ROPS)
1. Introduction 1.1. This Appendix is for ASN National and lower status Events.
1.2. Care should be taken to check FIA International requirements for Groups, Classes and Formulae which may not be covered by this section. The ASN generally aligns itself with FIA ROPS Regulations wherever possible.
1.3. The following are various specifications and configurations that can be used in manufacturing, preparing and installing Roll-Over Protection Systems( ROPS) into Production Cars, Touring Cars Saloon and Sports Cars Art. 20, Sports Racing Cars( Art. 21), Single Seaters( Art. 22), and other forms of Competition Vehicles( Art. 23).
1.4. The details covered in this section give many permutations, the ASN mandatory requirements are the minimum acceptable.
1.5. The use of a rollbar to achieve or supplement aerodynamic effects is prohibited.
2. Definitions
2.1. Safety Cage: A structural framework designed to prevent serious bodyshell deformation in the case of a collision or a car turning over.
2.2. Rollbar: Structural frame or hoop and mounting points.
2.3. Rollcage: Structural framework made up of a main rollbar and a front rollbar( or two lateral rollbars), their connecting members, one diagonal member, backstays and mounting points( see Appendix 13 Diagram 14 and 15).
2.4. Main Rollbar: Structure consisting of a near-vertical frame or hoop located across the vehicle just behind the front seats.
2.5. Front Rollbar: Similar to Main Rollbar but its shape follows the windscreen pillars and top screen edge.
2.6. Lateral Rollbar: Structure consisting of a near-vertical frame or hoop located along the right or left hand side of the vehicle. The rear legs of a lateral rollbar must be just behind the front seats. The front leg must be against the screen pillar and dashboard such that it does not unduly impede entry or exit of Driver or Co-Driver.
2.7. Longitudinal Member: Longitudinal tube which is not a part of the main, front or lateral rollbar, for example, a backstay.
2.8. Diagonal Member: Transverse tube between a top corner of the main rollbar or upper end of a backstay and a lower mounting point on the opposite side of the rollbar or backstay.
2.9. Framework Reinforcement: Reinforcing member fixed to the rollcage to improve its structural efficiency.
2.10. Reinforcement Plate: Metal plate fixed to t0068e bodyshell or chassis structure under a rollbar mounting foot to spread load into the structure.
2.11. Mounting Foot: Plate welded to a rollbar tube to permit its bolting or welding to the bodyshell or chassis structure, usually onto a reinforcement plate.
2.12. Removable Members: Structural members of a safety cage which are able to be removed.
2.13. Harness Bar: A transverse tubular member attached across either the main hoop or backstays to accept harness mountings.
Motorsport UK 2025 National Competition Rules Version 11
Chapter 7 Appendix 3- Roll Over Protection Systems( ROPS) 249