'Side chamber' in the Bible

And the side chambers were a side chamber over a side chamber, three stories, and thirty times. And they entered the wall of the house for the side chambers all around, that they might be fastened, for they were not fastened to the wall of the house.

The width of the wall, which was for the side chamber to the outside, was five cubits, and what was left between the side chambers that were of the house.

And the door of the side chamber was toward the open space, one door northward and one door southward. And the width of the place of the open space was five cubits all around.