'Recess' in the Bible

Each recess was about 10 feet long and 10 feet deep, and there was a space of 8¾ feet between the recesses. The inner threshold of the gate on the temple side next to the gate’s portico was about 10 feet.

Then he measured the gateway from the roof of one recess to the roof of the opposite one; the distance was 43¾ feet. The openings of the recesses faced each other.