Download or read book Effect of Drying Methods on Warp and Grade of 2 by 4 s from Small diameter Ponderosa Pine written by William Turner Simpson and published by . This book was released on 2001 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two studies were performed to characterize and control warp in nominal 2- by 4-in. (standard 38- by 89-mm) dimension lumber sawn from small-diameter ponderosa pine trees. One study was conducted at a commercial sawmill with trees harvested in central Arizona. The other study was conducted at the USDA Forest Service, Forest Products Laboratory, Madison, Wisconsin, in small experimental kilns with lumber from trees harvested in central Idaho. The three main variables in the studies were top loading, presteaming, and a high-temperature kiln schedule. A limited study of hot press drying was also included. The high-temperature kiln schedule in the experimental kilns reduced drying time to about half that of the conventional temperature schedule. Press drying time was slightly more than 3 h. Crook and bow caused most of the warp and the grade loss from warp. There was no evidence that presteaming affected warp or grade loss from warp. Top loading had a modest effect in reducing warp and grade loss from warp. High-temperature drying did not affect measured warp compared with the conventional temperature schedule. Grade loss from warp was less in high-temperature than in conventional temperature dried lumber. This might be explained by differences in moisture content change during storage. Press drying did not reduce warp or grade loss from warp.

Download or read book Effect of Drying Methods on Warp and Grade of 2 by 4 s from Small diameter Ponderosa Pine written by Wiiliam T. Simpson and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Drying Temperature on Warp and Downgrade of 2 by 4 s from Small diameter Ponderosa Pine written by William T. Simpson and published by . This book was released on 2004 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Drying Temperature on Warp and Downgrade of 2 by 4 s from Small diameter Ponderosa Pine written by William T. Simpson and published by . This book was released on 2004 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Warpage of Studs from Young Growth Ponderosa Pine from Northern New Mexico written by Donald C. Markstrom and published by . This book was released on 1984 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Evaluation of Saw dry rip SDR for the Manufacture of Studs from Small Ponderosa Pine Logs written by Robert R. Maeglin and published by . This book was released on 1983 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Paper FPL written by and published by . This book was released on 1983 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Effect of Moisture Content on Warp in Hardwood 2 by 6 s for Structural Use written by William Turner Simpson and published by . This book was released on 1999 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book High temperature Drying of Southern Pine 2 by 4 s written by C. C. Gerhards and published by . This book was released on 1986 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Effect of Moisture Content on Warp in Hardwood 2 by 6 s for Structural Use written by William T. Simpson and published by . This book was released on 1999 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: