The bottom floor was five cubits wide, the middle floor six cubits, and the third floor seven cubits. He also placed offset ledges around the outside of the temple, so that nothing would be inserted into its walls.
Here, I. The temple is called the house of the Lord (Kg1 6:1), because it was, 1. Directed and modelled by him. Infinite Wisdom was the architect, and gave David the plan or pattern by the Spirit, not by word of mouth only, but, for the greater certainty and exactness, in writing (Ch1 28:11, Ch1 28:12), as he had given to Moses in the mouth a draught of the tabernacle.
Commenting on 1 Kings 6:1-10
And the nethermost chamber was five cubits broad,.... The nethermost row of them, which were upon the first floor: and the middle was six cubits broad, and the third was seven cubits broad; so that the middlemost was a cubit larger than the lowest, and the highest a cubit larger than that: the reason of which was, for without in the wall of the house...
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. (e) Which were certain stones coming out of the wall, as stays for the beams to rest upon.