Ezekiel 41:5-9, 11

Then he measured the wall of the Temple, and it was 10-1/2 feet thick. There was a row of rooms along the outside wall; each room was 7 feet wide. These side rooms were built in three levels, one above the other, with thirty rooms on each level. The supports for these side rooms rested on exterior ledges on the Temple wall; they did not extend into the wall. Each level was wider than the one below it, corresponding to the narrowing of the Temple wall as it rose higher. A stairway led up from the bottom level through the middle level to the top level. I saw that the Temple was built on a terrace, which provided a foundation for the side rooms. This terrace was 10-1/2 feet high. The outer wall of the Temple’s side rooms was 8-3/4 feet thick. This left an open area between these side rooms

Two doors opened from the side rooms into the terrace yard, which was 8-3/4 feet wide. One door faced north and the other south.