Commentaire de citation sur Rois 1 6:6

המוכר את הבית. היציע – like a kind of room that they make around the walls of the house from the outside, like what was in the Temple, as it is written (I Kings 6:6): “The lowest story was [five cubits wide],” and there are those who make it in the thickness of the wall. But even though that it is open to the house and its usage is within, even so, it is not sold. And it is four cubits, but if it is not four cubits, it is not considered [separate] and it is sold with the house.

The [chamber] of the lowest [story] was five cubits wide and at the ceiling six cubits. The mishnah's explanation of the size of the cells is based on I Kings 6:6. The bottom story's cells were each five cubits in breadth. In the walls of the Hekhal they would reduce the thickness of the wall by a cubit at this point so that the ceiling of the cell could rest on the point where the wall was brought in. This is also referred to in the continuation of the above verse from I Kings. This would mean that at the point of the ceiling the cell was one cubit broader.

The [chamber] of the top [story] was seven cubits wide, as it says, "The lowest story was five cubits wide, the middle one 6 cubits wide and the third 7 cubits wide" (I Kings 6:6). Similarly, the third story was the breadth of the ceiling of the second story. As stated above, this matches the verse in I Kings that describes Solomon's Temple. We should emphasize that this is another example where either the Second Temple was patterned after the First Temple, or the rabbis at least imagined that it was.

that they should not be held in the wall of the House Their ends on the side toward the wall of the Heichal rested on, and penetrated the recesses, i.e., the wall of the Heichal protruded into the interior of the cells, as it is stated regarding Solomon’s [Temple] building (I Kings 6:6): “for he made rebatements in [the wall of] the House round about on the outside.” The width of the interior of the nethermost chamber was five cubits, and its upper story was six, for the wall of the Heichal was recessed from above one cubit; therefore the interior of the nethermost one was five cubits wide and the third chamber was seven cubits wide and this was atop the middle one, which had the wall of the Heichal protruding into it one cubit from above and these too were like them. And this is what is meant by “and they would nor be held in the wall of the House”; they did not penetrate into the wall of the Heichal as do ends of other low beams which are fastened onto a high wall, i.e., [builders usually] make holes in the wall and thrust the beams into the holes.