The side rooms surrounding the temple widened at each successive level, because the structure surrounding the temple ascended by stages corresponding to the narrowing of the temple wall as it rose upward. And so a stairway went up from the lowest story to the highest, through the middle one.
We are still attending a prophet that is under the guidance of an angel, and therefore attend with reverence, though we are often at a loss to know both what this is and what it is to us. Observe here, 1. After the prophet had observed the courts he was at length brought to the temple, Eze 41:1.
Commenting on Ezekiel 41:1-11
And there was an enlarging, and a winding about still upward to the side chambers,.... These chambers, as they rose up in stories one above another, were larger and larger; those in the middlemost storey were larger than those in the lower storey by a cubit; so much being taken out of the thickness of the wall, to make the rests or rebatements for the...
the breadth . . . so increased from the lowest . . . to the highest--that is, the breadth of the interior space above was greater than that below.