auxiliary rafter[ȯg′zil·yə·rē ′raf·tər]
A member strengthening the principal rafter in a truss.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
Above a principal rafter, a second principal rafter, occasionally used in a large queenpost truss.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.