Cross reference
Ezekiel 42:5
5 Now the upper chambers were shorter: for the galleries were higher than these, than the lower, and than the middlemost of the building.
Ezekiel 41:7
7 And there was an enlarging, and a winding about still upward to the side chambers: for the winding about of the house went still upward round about the house: therefore the breadth of the house was still upward, and so increased from the lowest chamber to the highest by the midst.