Abstract: A seat back core for a vehicle having a fold down seat which is also required to serve as a load floor.The core is blow-molded and formed with a pair of parallel spaced walls having tying links extending between the walls to strengthen and rigidify the core but not to prevent flexure thereof. There is a peripheral closing wall around the core.An elongate metal member is incorporated into the core at the time that it is blow-molded and becomes a permanent part of the core. It serves to limit the flexure of the core, provide additional strength and may serve as an anchor for securement of hardware.

Abstract: An automotive structural member which is especially intended for use as a fold down multipurpose vehicle seat back core but is not limited to such use.