tack weld[′tak ‚weld]
A joint between two pieces of metal made by welding at isolated points.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
A weld designed not to carry a load, but to make a nonstructural connection.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
1. A weld used for holding metal parts in position temporarily.
2. One of a series of welds applied where a continuous weld is unnecessary.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.