I've had similar concerns specifically in a situation where there is a Hot Tub and Metal studded walls were within reach and a suspended ceiling above. Walls would have Sheetrock covering them, but who among us has not seen a screwhead showing on a wall like this. As far as the ceiling goes I was thinking that the Ts (within 5 feet) should be screwed or riveted together and bonded to the tub.
Bill
