'Space' in the Bible

The outer wall of the side chambers was five cubits thick, and there was an empty space between the Temple's side chambers

The side chamber doorway facing the free space contained a single north-facing doorway and a second south-facing doorway. The width of the free space was five cubits all around the perimeter.

The upper chambers were narrower, since the galleries required more space than did the lower and middle portions of the building.