Five cubits broad, to wit, on the inside, and besides the galleries mentioned above. Narrowed rests, or, narrowings; as in our buildings the walls of a house are thicker or broader at the bottom, and narrower towards the top; only these narrowings were in the outside of the wall, which at each of the three stories was a cubit narrower than that beneath it. And this is mentioned as the reason of the differing breadth of the chambers, because the wall being narrower, allowed more space for the upper chambers. That the beams should not be fastened in the walls of the house; that there might be no holes made in the wall for the fastening of them; and that the chambers might be removed, if occasion were, without any inconvenience to the house.
Related Commentaries of 1 Kings 6:6
1 Kings 6:6
6 The nethermost chamber was five cubits broad, and the middle was six cubits broad, and the third was seven cubits broad: for without in the wall of the house he made narrowed rests round about, that the beams should not be fastened in the walls of the house.