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beam box[′bēm ‚bäks]
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
wall box, beam box, wall frame
1. A frame or box which is set into a brick, masonry, or stone wall to receive a timber beam or joist.
2. In electrical wiring, a metal box which is set in a wall for switches, receptacles, etc.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.