bar joist[′bär ‚jȯist]
A small steel truss with wire or rod web lacing used for roof and floor supports.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
An open web joist with diagonal struts made of round or square steel bars with the top and bottom chords made up from pairs of steel angles.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
An open-web flat-trussed structural member used to support a floor or roof structure.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.