A metal or wood surface set in a wall, to which the finished frame is attached.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
A wood or metal subframe, set in a wall, to which the finished frame is attached; also called a rough buck or sub-buck.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.