If you're interested in the details, here is a close-up picture of the turrets of a Benson class DD:
And more at the source it came from.
http://www.navsource.org/archives/05/431.htm
And here is a close-up of the turret on a Gearing class, which was an Allan M. Sumner stretched to hold more fuel:
The framing gets missed a lot. I'm not sure, but I'm betting the 5" turrets on American battleships had the same external framing.