As previously reported by Autosport, AlphaTauri prepared a significant upgrade to the AT04's floor for the 2023 season finale, which was intended as a research and development item for the 2024 car but is also expected to yield a "few tenths" in a last-ditch fight with Williams for P7 in the constructors' championship.
In the FIA's tech document released on Friday morning, AlphaTauri has reworked the main floor body as well as its edges and fences "to improve the local load generation of the forward floor".
It explained: "The keel area above the t-tray also now features a vane that generates additional local load. The mid floor and 'canoe' surfaces local to the plank have also been extensively modified to enable greater local load generation from that part of the floor.
"The spanwise position and spacing of the fences has also changed significantly from the previous floor to better optimise their relative loading. The area behind the outermost fence on the upper surface has also changed to improve the quality of air flow onto the floor edge wing."
Source: Autosport