Plank Assembly

In Simple Terms

Every F1 car must have a plank (a wooden board) fitted underneath that touches the track surface. This plank must be built to exact specifications and have three specific holes drilled through it. The plank helps the FIA monitor if teams are running their cars too low, which could give them an unfair aerodynamic advantage.

• A plank assembly is mandatory equipment on all F1 cars, positioned at the lowest point of the chassis
• The plank must meet precise manufacturing tolerances (±0.5mm) and include three 34mm diameter holes at exact locations for FIA inspection
• The plank's 10mm thickness (±0.2mm) is critical for detecting illegal car ride heights during races and testing
• The plank must not contact the air stream, meaning it must be positioned to only touch the track surface