needling(redirected from TrP-DN)
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Underpinning the upper part of a building with horizontally placed timber or steel beams.
Cutting holes or ledges in a coal bed or rock surface for receiving the ends of timber supports.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
1. Attaching a base coat of thatch onto the battens of a thatched roof; by sewing them together with a large, flat metal needle.
2. A needle beam which provides temporary support of a load.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.