normal ceiling in a sentence

1. "There's a normal ceiling height below, and eight feet above ."
2. Mezzanines, however, may have lower-than-normal ceilings due to their location.
3. The normal ceiling for the guard's Pavehawk helicopter is 10, 000 feet ( 3, 000 meters ), said Staff Sgt.
4. Those that are built in Massachusetts as primary housing tend to be more modest in size and have normal ceiling heights.
5. It's difficult to find normal ceiling in a sentence.