Article C3.5.3
Floor Sidewall
Technical Regulations
Article C3.5.3
Floor Sidewall
Chapter: C3
In Simple Terms
The floor sidewall (the side edge of the floor) must fit within a defined boundary shape and can have up to two distinct sections when viewed from the side or top. This prevents teams from creating complex, multi-layered designs that could provide unfair aerodynamic advantages.
- Floor sidewall bodywork must stay completely within the RV-FLOOR-SIDEWALL boundary
- Maximum of two sections allowed when looking at any horizontal plane (Y-Plane)
- Maximum of two sections allowed in vertical planes (Z-Plane) above 100mm height
- Prevents overly complex floor designs that could exploit aerodynamic loopholes
Official FIA Text
Floor Sidewall Bodywork must lie entirely within RV-FLOOR-SIDEWALL, have up to two sections in any Y-Plane, and above Z=100 have up to two sections in any Z-Plane.
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2026 Season Regulations