Article C3.5.1
Floor Body
Technical Regulations
Article C3.5.1
Floor Body
Chapter: C3
In Simple Terms
The floor of an F1 car must fit within a specific defined area and completely hide the power unit and differential from underneath. It can have up to two separate sections when sliced horizontally at any height.
- Floor must stay within the RV-FLOOR-BODY boundary box defined in regulations
- The power unit (PU) and differential (DIFF) must be completely hidden from below when viewing the car
- Maximum of two floor sections allowed at any horizontal level (Z-Plane)
- These restrictions prevent cars from gaining unfair aerodynamic advantages through floor design
Official FIA Text
Floor Body Bodywork must lie entirely within RV-FLOOR-BODY, when viewed from below fully obscure RV-PU-ICE and RV-DIFF, and have up to two sections in any Z-Plane.
floor bodybodyworkpower unitdifferentialz-plane
2026 Season Regulations