Ezekiel 41:8

Then he measured the wall of the house, six cubits; and the width of every side room, four cubits, all around the house on every side.

The side rooms were in three stories, one over another, and thirty in each story. They entered into the wall which belonged to the house for the side rooms all around, that they might be supported and not penetrate the wall of the house.

The side rooms were wider on the higher levels, because the walls were narrower at the higher levels. Therefore the width of the house increased upward; and so one went up from the lowest level to the highest through the middle level.

The thickness of the outer wall of the side rooms was five cubits. That which was left was the place of the side rooms that belonged to the house.

Between the rooms was a width of twenty cubits around the house on every side.

The doors of the side rooms were toward an open area that was left, one door toward the north, and another door toward the south. The width of the open area was five cubits all around.