'Side chambers' in the Bible

And against the wall of the house he built floors round about, against the walls of the house, round about the temple and the oracle; and he made side-chambers round about.

The lowest story was five cubits wide, the middle was six cubits wide, and the third was seven cubits wide; for he made offsets (niches) in the walls all around on the outside of the house so that the supporting beams would not be inserted into the walls of the house.

The entrance to the side-chambers of the middle floor was in the right side of the house; and they went up by winding stairs into the middle floor, and out of the middle into the third.

and it was covered with cedar above upon the side-chambers, which were on forty-five pillars, fifteen in a row.