Cross reference
Ezekiel 42:6
6 for they `are' threefold, and they have no pillars as the pillars of the court, therefore it hath been kept back -- more than the lower and than the middle one -- from the ground.
Ezekiel 41:6
6 And the side-chambers `are' side-chamber by side-chamber, three and thirty times; and they are entering into the wall -- which the house hath for the side-chambers all round about -- to be taken hold of, and they are not taken hold of by the wall of the house.
1 Kings 6:8
8 The opening of the middle side `is' at the right shoulder of the house, and with windings they go up on the middle one, and from the middle one unto the third.