King James Version
And there was an enlarging, and a winding about still upward to the side chambers: for the winding about of the house went still upward round about the house: therefore the breadth of the house was still upward, and so increased from the lowest chamber to the highest by the midst.English Standard Version
And it became broader as it wound upward to the side chambers, because the temple was enclosed upward all around the temple. Thus the temple had a broad area upward, and so one went up from the lowest story to the top story through the middle story.New International Version
The side rooms all around the temple were wider at each successive level. The structure surrounding the temple was built in ascending stages, so that the rooms widened as one went upward. A stairway went up from the lowest floor to the top floor through the middle floor.