1 Kings 6:5-6

5Against the wall of the House he built a side-structure surrounding both the Temple and the inner Sanctuary; thus he made side-chambers all around.

6The lowest story was five cubits wide, the middle was six cubits wide, and the third was seven cubits wide. All around on the outside he provided offset ledges in the wall of the House, so that the beams would not be inserted into the walls of the House.