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common joist[¦käm·ən ¦jȯist]
An ordinary floor beam to which floor boards are attached.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
common joist, bridging joist
A joist on which floorboards are laid; neither supports nor is supported by another joist.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.