You are here: Home
/ Publication Information
Title: Crook and overlength in hardwood lumber:results from a 14-mill survey
Author: Wiedenbeck, Jan; Brown, John; Bennett, Neal
Source: Forest Products Journal. 53(5): 61-66.
Publication Series: Journal/Magazine Article (JRNL)
Description: Data on red oak lumber were collected at 14 furniture and cabinet industry rough mills to identify how crook and overlength are related to lumber grade and size from mill to mill. The amount of crook in a sample of dry, 4/4 thickness, red oak lumber was significantly influenced by lumber grade and length, supply region, and mill. There were no differences in crook based on board width. Average overlength, which can pose challenges in lumber drying operations, was influenced by lumber grade, nominal lumber length, source region, and supplier. There were several complex interactions between these variables that are important in modeling overlength. Odd-length lumber, which accounted for 13.7 percent of the lumber sample, generally is trimmed less precisely than even-length lumber. There was no consistency between lumber grade and overlength from mill to mill. In some cases, the 3A grade had the highest average overlength; in other cases, the FAS, Selects, 1 Common, or 2 Common grade had higher overlength. Average log overlength amounts are higher than lumber overlength amounts. Secondary manufacturers who incur increased costs due to overlength lumber or decreased yield due to crooked lumber need to look for these differences in their own lumber supply and learn how they reduce their mill's processing efficiency and yield.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
- This publication may be available in hard copy. Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact Sharon Hobrla, email@example.com if you notice any errors which make this publication unusable.
XML: View XML
Wiedenbeck, Jan; Brown, John; Bennett, Neal 2003. Crook and overlength in hardwood lumber:results from a 14-mill survey. Forest Products Journal. 53(5): 61-66.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility