The foundations of the side chambers - Therefore the height of the side-chambers from the floor was six cubits there being three stories, which corresponds sufficiently with the twenty cubits which was the height of the temple. “A great cubit” is probably an architectural term to denote the line of junction between two stories, which would be that of the ceiling of the lower and the floor of the upper story.
Related Commentaries of Ezekiel 41:8
Ezekiel 41:8
8 I saw also the height of the house round about: the foundations of the side chambers were a full reed of six great cubits.