'Inlets' in the Bible

And the side-rooms, room over room, were three times thirty; there were inlets in the wall of the house for the side-rooms round about, for supports in the wall of the house.

The side-rooms became wider as they went higher up the house, by the amount of the space let into the wall up round about the house, because of the inlets in the house; and one went up from the lowest floor by steps to the middle, and from the middle to the upper floor.