Article C3.5.5
Floor Board
Technical Regulations
Article C3.5.5
Floor Board
Chapter: C3
In Simple Terms
The floor of the car must fit within a specific boundary box and can have up to three distinct sections. Any aerodynamic parts visible from the side behind a certain point must angle forward (not backward) and have smooth curves with a minimum 100mm radius to prevent sharp edges.
- Floor bodywork must stay within the defined RV-FLOOR-BOARD boundary
- Maximum of three separate sections allowed in any direction (X, Y, and Z planes)
- Side-facing aerodynamic surfaces must point forward, not inward or backward
- All curved surfaces must have a minimum radius of 100mm to ensure safety and prevent sharp edges
Official FIA Text
Floor Board Bodywork must lie entirely within RV-FLOOR-BOARD and have up to three sections in any X, Y and Z-Plane. Aerodynamic Surfaces visible from side rearward of XF=825 must have normal with positive X component and contain no concave radius less than 100mm.
floor boardbodywork boundaryaerodynamic surfacesfloor regulationscar dimensions
2026 Season Regulations