yard lumber[′yärd ‚ləm·bər]
A category of lumber up to 5 inches (12.5 centimeters) thick.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
Lumber that is less than 5 inches thick and is intended for general building purposes.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
Lumber up to 5 in. (12.5 cm) thick intended for general building construction.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.