Ezekiel 41:9-10, 11

The outer wall of the side rooms was five cubits thick. On the raised platform there was a terrace all around the side rooms of the temple. It was twenty cubits between the edge of the platform and the rooms for the priests.

And the doors of the side rooms faced an open area, one door toward the north and one door toward the south. The width of the open area was five cubits wide all around.