conical roll[¦kän·ə·kəl ¦rōl]
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
batten roll, conical roll
In metal roofing, a roll joint formed over a triangular-shaped wood piece.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.