For they were in three stories— The two upper stories had balconies projecting from them, the breadth of which was taken out of the rooms themselves, which rendered them so much the narrower, because the weight of the balconies was not supported by pillars, as the rooms over the cloisters of the inner court were, but only by the wall. See Houbigant's note.
Related Commentaries of Ezekiel 42:6
Ezekiel 42:6
6 For they were in three stories, but had not pillars as the pillars of the courts: therefore the building was straitened more than the lowest and the middlemost from the ground.