CHAPTER 16 AUTOCROSS AND RALLYCROSS AND OFF-ROAD RACING PART B( RALLYCROSS) Appendix 11- Rallycross Spaceframe Technical Regulations
These regulations are mandatory for all Spaceframe Vehicles. All vehicles must comply with Ch. 7, and App. 9 Art. 1-12 of this Chapter unless where specified below:
1. General Technical Requirements and Exceptions
1.1. The use of magnesium or titanium alloy is not permitted, with the exception of titanium sheets which may only be used for heat shields.
1.2. All Spaceframe Vehicles must have an identification number stamped into a plate measuring 80mm x 20mm which must be welded to the centre of the underside of the main‘ B’ hoop.
2. Safety Requirements 2.1. As a minimum:
a.
b.
c.
d.
ROPS door bars to Ch. 7 App. 13 Diagram 21. a or 21. g or 21. h are mandatory, on driver and passenger side.
Where the door bar elements of the ROPS cross, a reinforcement for the bend or junction must be fitted in all four angles. This reinforcement must be made from bent sheet metal with a U shape the thickness of which must not be less than 1.0 mm. The ends of this gusset( point E) must be situated at a distance from the top of the angle( point S) of between 2 to 4 times the outer diameter of the biggest of the tubes joined. Appendix 12 Drawing 8.6. A cut-out is permitted at the top of the angle but its radius( R) must be no greater than 1.5 times the outer diameter of the biggest of the tubes joined. The flat sides of the gusset may have a hole, the diameter of which must not be greater than the outer diameter of the biggest of the tubes joined.
A currently FIA homologated competition seat with appropriate mountings is mandatory in accordance with Ch. 7 App. 7 Art. 2.
All Vehicles must be fitted with an extinguisher system plumbed-in for discharge into both the engine compartment and the cockpit( Ch. 7 App. 6 Art. 1).
3. Chassis and Bodywork 3.1. The Vehicle must have the Silhouette of a Series Production Car of a closed type.
3.2. The wheelbase will be as per the Series Production Car specification with a tolerance of ± 0.5 %. The vehicle width of the Series Production Car must be retained with a maximum permitted increase of 100mm.
3.3. The minimum elements of the Spaceframe are shown in App. 12. 3.4. The Drivers door must be of steel construction.
3.5. No element of the ROPS may pass through the space normally used for the front passenger; to allow driver extraction from either side of the car.
3.6. The floor frame is an integral part of the structure and the‘ A’ and‘ B’ main hoops must attach to it. The floor frame must be constructed from either minimum 50mm x 2mm square box section or minimum 50mm x 2mm diameter tube material in accordance with Ch. 7 App. 3 Art. 20 The floor must be made of either minimum 10mm composite, 1mm steel or 2mm aluminium alloy to be fixed to the top of the floor frame as defined in App. 12 Drawing 8.2.
3.7. The forward most part of the Spaceframe must be at least 100mm behind the forward most part of the front bumper( App. 12 Drawing 8.5).
Motorsport UK National Competition Rules 2026 Edition 1
Chapter 16 Part B( Rallycross) Appendix 11- Rallycross Spaceframe Technical Regulations
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