Last edited by Tushura
Monday, July 27, 2020 | History

4 edition of Heat sterilization time of Ponderosa pine and Douglas-fir boards and square timbers found in the catalog.

Heat sterilization time of Ponderosa pine and Douglas-fir boards and square timbers

William Turner Simpson

Heat sterilization time of Ponderosa pine and Douglas-fir boards and square timbers

by William Turner Simpson

  • 144 Want to read
  • 1 Currently reading

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

    Subjects:
  • Wood -- Thermal properties,
  • Ponderosa pine,
  • Douglas fir

  • Edition Notes

    StatementWilliam T. Simpson, Xiping Wang, Steve Verrill
    SeriesResearch paper FPL-RP -- 607
    ContributionsWang, Xiping, Verrill, S. P, Forest Products Laboratory (U.S.)
    The Physical Object
    FormatMicroform
    Pagination24 p.
    Number of Pages24
    ID Numbers
    Open LibraryOL13570447M
    OCLC/WorldCa52786471

    Attribute Name Values; Creator: Bouffier, Laurent A. Gartner, Barbara L. Domec, Jean-Christophe; Abstract: The Willamette Valley (WV) race of ponderosa pine (Pinus ponderosa) is being widely planted for timber in the Willamette Valley, western Oregon, because it grows in habitats that are either too wet or too dry for Douglas-fir (Pseudotsuga menziesii).   Ponderosa pine firewood is easy to burn and produces good flames that make it a decent choice of firewood for fireplaces and campfires. But being a low density softwood it burns fast and has a low BTU rating so it’s not the best wood for wood stoves and home heating.

      Habitat is a major difference. The Ponderosa Pine (Pinus ponderosa) is found in the dry interior of BC. Here they are in April, with the typical open grassland understory. It's dry here. The flowers and greenery come out in spring, and then ev. failed. It is true that ponderosa pine will grow in a flood-prone area, but is this really the place to grow trees at all? Often, the best sites are reserved for more profit-able species such as Douglas-fir or western redcedar, as well they should be, but ponderosa will do very well on some good sites and may be the best choice for them.

    Heat sterilization time of ponderosa pine and Douglas-fir boards and square timbers To prevent the unintentional transfer of insects and pathogens during world trade, wood products are often heat sterilized. The general requirement is that the center of the wood configuration be held at °F (56°C) for 30 min. Douglas-fir and ponderosa pine tapered logs David W. Green Thomas M. Gorman James W. Evans Joseph F. Murphy Cherilyn A. Hatfield I Abstract Approximately Douglas-fir and ponderosa pine logs. 3 to 6 inches in diameter, were tested in third-point bending and in Compression parallel to the grain. The moisture content at time of test was about.


Share this book
You might also like
mineralogy of the red clay and its relation to slope stability in Douglas County, Wisconsin

mineralogy of the red clay and its relation to slope stability in Douglas County, Wisconsin

Slane

Slane

The bear who came to stay

The bear who came to stay

The spanish mustang

The spanish mustang

Brick cladding to a steel framed building

Brick cladding to a steel framed building

Rome and law.

Rome and law.

Research on Alcoholics Anonymous

Research on Alcoholics Anonymous

Law

Law

Terran Girls Make Wonderful Wives / Minesweeper (Gryphon double novel)

Terran Girls Make Wonderful Wives / Minesweeper (Gryphon double novel)

Marius

Marius

housing issue

housing issue

Judith Wright

Judith Wright

Access The Akashic Records

Access The Akashic Records

Summarizing in doctor-patient interaction.

Summarizing in doctor-patient interaction.

Evolution out of doors

Evolution out of doors

A true copy of a poll of the burgesses of the borough of Derby

A true copy of a poll of the burgesses of the borough of Derby

Worlds end

Worlds end

Heat sterilization time of Ponderosa pine and Douglas-fir boards and square timbers by William Turner Simpson Download PDF EPUB FB2

Heat Sterilization Time of Ponderosa Pine and Douglas-Fir Boards and Square Timbers William T. Simpson, Research Forest Products Technologist Xiping Wang, Engineer Steve Verrill, Mathematical Statistician Forest Products Laboratory, Madison, Wisconsin Introduction Heat sterilization of lumber, timbers, and pallets is currentlyCited by: 1.

Heat sterilization time of ponderosa pine and Douglas-fir boards and square timbers () To prevent the unintentional transfer of insects and pathogens during world trade, wood products are often heat sterilized.

The general requirement is that the center of the wood configuration be held at °F (56°C) for 30 min. BibTeX @MISC{Service03heatsterilization, author = {Forest Service and William T. Simpson and Xiping Wang and Steve Verrill}, title = {Heat Sterilization Time of Ponderosa Pine and Douglas-Fir Boards and Square Timbers}, year = {}}.

However, many factors can affect the time required to reach this temperature. This study explored several of these factors, including thickness of boards or cross-sectional dimension of square timbers, wet-bulb depression, and stacking method (solid or stickered). The heating temperature used was °F (71°C).Cited by: 1.

Heat Sterilization Time of Ponderosa Pine and Douglas-Fir Boards and Square Timbers To prevent the unintentional transfer of insects and pathogens during world trade, wood products are often heat sterilized.

The general requirement is that the center of the wood configuration be held at °F (56°C) for 30 min. including thickness of. Simpson, William T. Two-dimensional heat flow analysis applied to heat sterilization of ponderosa pine and Douglas-fir square timbers.

Wood and Fiber Science 36(3): Simpson, William T.; Wang, Xiping. Estimating air-drying times of small-diameter ponderosa pine and douglas fir logs.

Res. Pap. FPL-RP Douglas-fir boards and square timbers to a center temperature of required to heat stickered ponderosa pine and Douglas-fir boards and timbers to a heat sterilization time of slash pine.

times for ponderosa pine and Douglas-fir boards and square timbers to a center temperature of °F (56 °C) in a heat-ing environment of °F (71 °C) dry-bulb temperature and various wet-bulb depressions. Table 20–4 summarizes aver-age heating times required to.

"Heat sterilization time of ponderosa pine and Douglas-fir boards and square timbers" PR Regards, DBAM # henrya. View Profile View Forum Posts Stainless Join Date Jun Location TN Posts 1, Post Thanks / Like. Estimating air-drying times of small-diameter ponderosa pine and Douglas-fir logs.

Wang, Xiping; Ross, Robert J.; Hunt, Michael O. Low Frequency Vibration approach to asess the Performance of wood structural Systems.

Source: Wood and fiber science. Vol. 36, no. 3 (): Pages ; Abstract. Equations for a two-dimensional finite difference heat flow analysis were developed and applied to ponderosa pine and Douglas-fir square timbers to calculate the time required to heat the center of the squares to target temperature.

Download Citation | Method for interconverting drying and heating times between round and square cross sections of ponderosa pine | To use small-diameter trees effectively as square timbers. Get this from a library. Heat sterilization time of Ponderosa pine and Douglas-fir boards and square timbers.

[William Turner Simpson; Xiping Wang; S P. The disadvantages for dry heat are the slow rate of heat penetration and microbial killing makes this a time-consuming method. In addition, the high temperatures are not suitable for most materials The most common time-temperature relationships for sterilization with hot air sterilizers are °C (°F) for 60 minutes, °C (°F.

Heat sterilization, import/export lumber Related Search. Estimating heating times of wood boards, square timbers, and logs in saturated steam by multiple regression; Heat sterilization time of ponderosa pine and Douglas-fir boards and square timbers; Effect of wet bulb depression on heat sterilization time of slash pine lumber.

Effect of wet bulb depression on the heat sterilization time of ponderosa pine and Douglas fir boards and square timbers.

Forest Products Laboratory Research Paper. In press. William T. Simpson* Barbara L. Illman The authors are, respectively, Research Forest Products Technologist and Supervisory Research Plant Pathologist, USDA Forest Serv. General Technical Report FPL-GTR Simpson WT () Two-dimensional heat flow analysis applied to heat sterilization of ponderosa pine and Douglas-fir square timbers.

Wood Fiber Sci 36(3)– Temperature (°C) Wood Sci Technol () – Simpson WT, Illman BL () Heat sterilization times of red pine boards. Heat sterilization time of ponderosa pine and douglas-fir boards and square timbers.

Res. Paper FPL-RP Madison, WI: U.S. Department of. Ponderosa pine is typically dominant on warm, dry sites with a short growing season and very low summer precipitation.

Temperatures annual average 41° to 50° F with extremes ranging from ° to ° F. Being drought tolerant, it out competes other species to occupy the transition zone between grassland and forest. softwood, such as Douglas-fir and Southern Pine, there is a marked con­ trast between the earlywood and latewood, and growth rings are plainly visible.

In other species, such as spruces and true firs, the change from earlywood to latewood is less obvious, and rings are more difficult to see.

Environmental conditions can also affect growth rings. Heat sterilization time of ponderosa pine and Douglas-fir boards and square timbers.

Verrill, Steve; Herian, Victoria L.; Green, David W. Predictor sort sampling and one-sided confidence bounds on quantiles.The Scottish botanist David Douglas named this pine for its ponderous or heavy wood.

Other common names are yellow pine, western longleaf pine, bull pine, western red pine, western pitch pine, Sierra brownbark pine, ponderosa white pine and black jack pine.

Native Americans used this tree extensively.7. William n, Two-Dimensional heat flow analysis applied to heat sterilization of Ponderosa Pine and Douglas - Fir square timbers, Wood and Fiber Science, ; 36(3), 0 0 0 0 0 0 0 0 0 0 0 0 0.