The formwork that is not struck, but is left permanently in position after the concrete has been cast.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
permanent formwork, permanent shuttering
A type of formwork that remains in place after the concrete work has set.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.