Wall 8347 acted as the Western limit of room I-22 and the divider between I-22 and the unexcavated room to the west. As with 8342 (its continuation north of wall plug SU 8346), the construction technique points to the initial phase of the building, but it is notably thinner than all other walls belonging to this phase and thus may be a later division. Further excavation, both in Room I-22 and in the room to the west, will help clarify this.