crossmember

noun2

1. •
   A transverse structural support.

   • But those crossmembers, you know like, there’s no—there would be no way to put him in the ground without… dismembering him. — 2025
2. •
   A beam lying crosswise; a rail.

   • The machines are supported at the pinion end by the gearcase itself and at the other end by cross-members of the bogie frame. — 1964