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Thursday, July 23, 2020 | History

1 edition of Improved utilization of small-diameter ponderosa pine in glued-laminated timber found in the catalog.

Improved utilization of small-diameter ponderosa pine in glued-laminated timber

Improved utilization of small-diameter ponderosa pine in glued-laminated timber

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Published by U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory in Madison, WI .
Written in English

    Subjects:
  • Laminated wood -- Testing.,
  • Wooden beams -- Evaluation.,
  • Ponderosa pine.,
  • Forest fires -- Prevention and control -- Economic aspects.

  • Edition Notes

    StatementRoland Hernandez ... [et al.].
    SeriesResearch paper FPL -- RP-625., Research paper FPL-RP -- 625.
    ContributionsHernandez, Roland., Forest Products Laboratory (U.S.)
    The Physical Object
    Pagination38 p. :
    Number of Pages38
    ID Numbers
    Open LibraryOL16128638M

    Full text of "Forest Service research accomplishments" See other formats. Substance Oak, red, black Oak, white Pine, Oregon Pine, red Pine, white Pine, Southern Pine, Norway Poplar Redwood, California Spruce, white, red Teak, African Teak, Indian Walnut, black Willow Various Liquids Alcohol, ethyl (%) Alcohol, methyl (%) Acid, muriatic, 40% Acid, nitric, 91% Acid, sulfuric, 87% Chloroform Ether Lye, soda, 66%.

    Forest Fuels Management and Biomass Utilization Bibliography: Effects of a forest health thinning program on land and timber values in Eastern Oregon Rummer, R.B. User guide for HCR Estimator Softwate to calculate cost and revenue thresholds for harvesting small-diameter ponderosa pine. Forest Service, USDA, General Technical. Pine can readily be produced in a large area of these pine stands can be greatly improved with quality product. Forester Kenneth Moore and L. ferent pine stands showing what needs to be done.

    Improved Utilization of Small-Diameter Ponderosa Pine in Glued-Laminated Timber const As NZS Reconstituted Wood-based Panels - Specifications Decorative Overlaid Wood Panels. Large volumes o f relatively small-diameter logs are generated from sustainable sources such as the Pacific Coast Hemlock second-growth forests. The percentage of juvenile wood in this kind of material is higher compared to limited old growth wood supplies. The present scientific knowledge is often limited to individual properties of juvenile wood without including interactions with other.


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Improved utilization of small-diameter ponderosa pine in glued-laminated timber Download PDF EPUB FB2

Improved Utilization of Small-Diameter Ponderosa Pine in Glued-Laminated Timber Roland Hernandez David W. Green David E. Kretschmann Steven P. Verrill United States Department of Agriculture Forest Service Forest Products Laboratory Research Paper FPL–RP– Get this from a library.

Improved utilization of small-diameter ponderosa pine in glued-laminated timber. [Roland Hernandez; Forest Products Laboratory (U.S.);] -- "This study involved the evaluation of ponderosa pine glulam made from lumber that was sawn from a small-diameter timber resource.

Two different glulam beam depths were evaluated: 8 and Additional Physical Format: Improved utilization of small-diameter ponderosa pine in glued-laminated timber 38 p. (OCoLC) Material Type: Document, Government publication, National government publication, Internet resource.

Improved Use of Ponderosa Pine in Glulam Beams In the United States, almost million acres of forests are severely overcrowded with small-diameter, densely stocked trees. These forests need to be thinned to improve their health and reduce the risk of catastrophic wildfire.

However, thinning is an expensive task, costing from $ Mechanical characterization of visually classified, small-diameter laricio pine round timber diameter Ponderosa pine in glued laminated timber. USDA.

Improved Utilization of Small-Diameter. David E. Kretschmann. Improved Utilization of Small-Diameter Ponderosa Pine in Glued-Laminated Timber.

Article. Full-text available. Socioeconomic Barriers and the Role of Biomass Utilization in Southwestern Ponderosa Pine Restoration The role of small-diameter wood utilization in the ter ponderosa pine in glued-laminated. Prevention of warp could significantly increase utilization of lumber from small-diameter ponderosa pine trees (Simpson and GreenSimpson ).

Mechanical properties. -- To reduce the amount of lumber that was tested, only the 2 by 4's that were broken in this study had potential for mechanical grading and glulam. I.,urnber was sawn Sro~n suppressed-growth ponderosa pine trees, 6 to 16 inches in diameter, harvested near Flagstaff, Arizona.

'l'lris paper presents grade recover and properlies li)r clry 2. Project Methods 1) Timber supply and harvesting: Design, develop and evaluate harvesting systems for operation in multi-structural stands of small and large diameter trees with emphasis on maintaining environmental quality.

Mathematically model timber supply. 2) Wood products manufacture: Develop new wood products and improve physical and mechanical properties of existing.

Using a green-gluing process, standard 38 by mm (nominal 2 by 4-in.) pieces (2 by 4s) ripped from pressed panels of edge-glued (edge-glued-and-rip [EGAR]) boards sawn from small ponderosa pine.

Glued-Laminated Timber Structural glued-laminated timber (glulam) is an engineered, stress-rated product that consists of two or more layers of lumber that are glued together with the grain of all layers, Green, D.W.; Kretschmann, D.E.; Verrill, S.P.

Improved utilization of small-diameter ponderosa pine in glulam timber. Res. Pap. FPL. Therefore, the direct comparison was limited to 2 by 4s, although boards from the EGAR process can reach a width of mm (12 in.).

Ponderosa pine was chosen for evaluation because of the large volume of small-diameter timber available in western US forests and because of the tendency for lumber produced from this material to warp.

The small-diameter logs are compatible with glulam technology because the smaller pieces of timber can be glued and jointed to become larger sizes. Studies are also being made to substitute solid timber in the production of glulam with thermally treated timber (Widmann et al., ), bamboo (Sinha et al.,Xiao et al.,Correal Cited by: 2.

This study involved the evaluation of ponderosa pine glulam made from lumber that was sawn from a small-diameter timber resource.

Two different glulam beam depths were evaluated: 8 and 13 laminations. A comprehensive glulam test program was conducted to evaluate edgewise and flat- wise bending, shear, and tensile strength.

Beam deflection was measured and a variety of glulam MOE values were. holes in glued laminated timbers are limited in size and location to maintain the structural integrity of the beam.

Figure 4 shows the zones of a uniformly loaded, simply supported beam where the field drilling of holes may be consid-ered. These non-critical zones are located in portions of the beam stressed to less than 50 percent of design File Size: 77KB.

Paints and finishes last longer on seasoned timber. The electrical and thermal insulation properties of wood are improved by seasoning.

Finger jointed wood. With growing use of plantation timber, maximizing the utilization of small dimension timber is becoming a requirement, not an option. The Online Books Page.

Online Books by. Forest Products Laboratory (U.S.) A Wikipedia article about this author is available. Forest Products Laboratory (U.S.): Wood Handbook: Wood as an Engineering Material (centennial edition, ) (PDF files with commentary at Forest Products Laboratory) Help with reading books-- Report a bad link-- Suggest a new listing.

Mechanical Properties of Wood-Based Composite Material chapter_pdf - Free download as PDF File .pdf), Text File .txt) or read online for free. holes in glued laminated timbers are limited in size and location to maintain the structural integrity of the beam.

Figure 3 shows the zones of a uniformly loaded, simply supported beam where the field drilling of holes may be consid-ered. These non-critical zones are located in portions of the beam stressed to less than 50 percent of design File Size: KB.

TIMBER PRODUCTS I. O 'J - rn mo oy bo CO — ~4 -E- ^ «— im r _t-o o o. ~n rn, — - 9°o m. -X) rn Single copies of the various items may be obtained free upon request from the Director, Forest Products Laboratory, Post Office BoxMadison, WI In addition, machine grading appeared to offer an economic benefit to lumber sawn from small-diameter trees (15).

o In Northern Idaho and Montana, studies on lodgepole pine and grand fir (7- to in. diameter at breast height [DBH] and approximately 45 years old) and ponderosa pine obtained by "thinning from below" showed that grand fir and.Glued-laminated Douglas fir beams from E-rated and tension proof loaded lumber / (Pullman, Wash.: Engineering Extension Service, ), by Melvin D.

Strickler and R. F. Pellerin (page images at HathiTrust; US access only) Defect estimation for grand fir, Engelmann spruce, Douglas-fir and western larch in the Blue Mountains of Oregon and.