Charles Ellicott Commentary Ezekiel 41:15

"And he measured the length of the building before the separate place which was at the back thereof, and the galleries thereof on the one side and on the other side, a hundred cubits; and the inner temple, and the porches of the court;" — Ezekiel 41:15 (ASV)

And he measured. —The rest of the chapter consists of an enumeration of various details, for the most part not previously mentioned, and this is introduced by a summary of the measurements already made. This clause is therefore to be understood as equivalent to “So he measured,” or, “And he had measured.” The dimensions of each of the principal parts are then repeated: the building to the west of the Temple, the Temple itself, and the porches of the court.

The only new point introduced is “its galleries.” It seems certain that this must refer to the building beyond “the separate place;” but the word for galleries occurs only here and in Ezekiel 41:16, Ezekiel 42:3, and Ezekiel 42:5, and its derivation is quite unknown. The translation, galleries, is probably correct; and as there was a space of 10 cubits on each side of the building in question, there may very well have been galleries covering and protecting its entrances, although they are not located with sufficient definiteness to be drawn on the plan.