rotten knot

unsound knot, decayed knot, rotten knot

A knot that is softer than the surrounding wood.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
of knots 0 Sound knots Not allowed Black knots Not allowed Rotten knots Not allowed Cracks Not allowed Discoloration Max 33% of top diameter over bark Grade Property 2 Allowed lengths (m) 3.1, 3.4, 4.0, 4.3, 4.6, 4.9, 5.2 Top diameter over bark (cm) Min 12 Type of log Knot-free butt log or intermediate log Sweep 2 cm/1.5 m Grooves, scars Not allowed Crooks Not allowed No.