HPDE section 11.4.12
All seats must be securely fastened to the structure of the car such that they are strong
enough to withstand a major impact.
If replaced, the replacement seat should be installed according to the manufacturerâ€™s
instructions. Expired FIA seats may be used in HPDE without a seat back brace if one
was not required originally. If stock seats are to be used with a roll bar/cage, care should be taken to prevent the seat from submarining
under the roll bar. Care should also be taken to prevent the occupant from hitting his/her head
on the roll bar/cage. Passenger seats must meet the same minimum requirements
, per the CCR, as the driver seat, if used by passengers.
The passenger seat does not have to match the driverâ€™s seat.
The driverâ€™s seat must be securely fastened and braced in such a way as to minimize the possibility of breaking
loose during an impact. L
arge fender washers and solid fabricated mounts are recommended. Seats made
primarily of plastic, PVC, ABS, or other similar polymers are strictly prohibited. The installation of the seat must
conform to all requirements published by the manufacturer.
Some series require an approved racing seat. It is strongly recommend that a racing seat be installed in all
vehicles. A racing seat is of solid design; not â€œtube and clothâ€ designs commonly found in passenger cars.
It can be very difficult to properly brace a â€œtube and clothâ€ type seat and the vehicle may not pass technical
inspection. Additionally, the cloth or material on a â€œstockâ€ seat is typically not flame retardant. Therefore, the
proper installation of a racing seat is strongly recommended.
The seat shall be mounted to a steel floor pan with reinforcements. A reinforcement structure should be
fabricated with a minimum thickness of 0.090â€ for those vehicles without a steel floor pan. The reinforcement
structure should be mounted to (or within) the steel frame / chassis / cage members.