Object to use while making a building?

[Talrain]

I can't seem to find the ID I used to use to make custom buildings from scratch. It was bench of some sort, flat, and basically looked more like a wooden plank than a bench. I've been trying random bench IDs I find in the database, but to no avail.
Does anyone have the ID for this object? It can be used to make floors, walls, ceilings, everything pretty much.

Thanks!