What do you call a boxlike projection from the ceiling, used to enclose vents, beams, or anything else that wont fit in the floor? Contractor calls them "bulkheads" but I don't think that's right..
Just in case I am being to vague/incomprehensible - specifically there are vents & beams which protrude into the basement space from the floor joists, about 12" lower than the ceiling itself. In order to cover the vents/beams up, a frame is built around them to be covered with drywall. What do you call this condition?