The side chambers were in three stories, one over another, thirty in each story. There were offsets all around the wall of the temple to serve as supports for the side chambers, so that they should not be supported by the wall of the temple.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.
(New Revised Standard Bible Version Online)