KJV:

4 And before the chambers was a walk of ten cubits breadth inward, a way of one cubit; and their doors toward the north.

NASB:

4 Before the chambers was an inner walk ten cubits wide, a way of one hundred cubits; and their openings were on the north.

A way with a width of 10 cubits in front of the chambers. In fact, this building has doors not only on the north, but also on the south side, but the north door is the front door. 1 cubit is the size of the gap between the pillars of the galleries and the building. The gallery, which on one side is in contact with the external courtyard, has a lower level of holiness, so there should not be common ground or even any common elements between these buildings. Buildings of varying degrees of holiness cannot be connected by electric wires, cables, water and sewer pipes, they must be completely independent from each other.