Floor plank

A 2x4 wooden plank, likely the same one from the hanging plank. It's purpose is to create a challenge for rovers to go over it (or just supposed to block rovers to have them go the other way around? idk). It normally blocks one half of the middle area of the basement.

There are several painted over nails embedded into the 2x4 plank, these can be heard if you hit it against the furnace