KJV:

6 And the side chambers were three, one over another, and thirty in order; and they entered into the wall which was of the house for the side chambers round about, that they might have hold, but they had not hold in the wall of the house.

NASB:

6 The side chambers were in three stories, one above another, and thirty in each story; and the side chambers extended to the wall which stood on their inward side all around, that they might be fastened, and not be fastened into the wall of the temple itself.

Groups of buildings of the temple complex of the Third Temple, with varying degrees of holiness.

These groups should not have points of contact and common elements, neither on the ground, nor above the ground, nor under the ground.