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Monday, May 18, 2020 | History

4 edition of Equilibrium moisture content of wood in outdoor locations in the United States and worldwide found in the catalog.

Equilibrium moisture content of wood in outdoor locations in the United States and worldwide

William Turner Simpson

Equilibrium moisture content of wood in outdoor locations in the United States and worldwide

by William Turner Simpson

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  • 20 Currently reading

Published by U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory in Madison, WI (One Gifford Pinchot Drive, Madison 53705-2398) .
Written in English

    Subjects:
  • Wood -- Moisture,
  • Lumber -- Drying

  • Edition Notes

    StatementWilliam T. Simpson
    SeriesResearch note FPL -- RN-0268, Research note FPL -- 0268
    ContributionsForest Products Laboratory (U.S.)
    The Physical Object
    FormatMicroform
    Pagination11 p.
    Number of Pages11
    ID Numbers
    Open LibraryOL13567587M
    OCLC/WorldCa40341157

    percentage of oven dry weight, moisture content is readily envisaged since it represents the amount of moisture contained in the wood as parts by weight of water to parts of wood substance. Finally, the equilibrium moisture content of many wood species at a given temperature and rela-File Size: 1MB. RESULTS ANT) DISCUSSION The EMC curves in figure 3 illustrate how the moisture content of fine forest fuels is influenced by relative humidity, These curves should be a useful guide for comparing the response of different fuels to rel- ative humidity, and for estimating fuel moisture levels at specific rel- ative humidities, However, certain limitations in the data should be.

    Equilibrium Moisture Content: Wood. Download Direct Link. Describes what the equilibrium moisture content of wood is and how to derive that value from existing or proposed temperatures and humidities. File Name: Released: J [15] Simpson, W.T., () Equilibrium moisture content of wood in outdoor locations in the United States and Worldwide, Research note FPL-RN, Forest Products Laboratory, United States Department of Agriculture, USA, [16] Stull D.R., (), Vapor pressure of pure substances organic compounds, Ind. Eng. Chem., 39() Author: Avdhesh K. Sharma.

    Abstract. If given enough time, the moisture content of wood will reach an equilibrium with its surrounding environment. The temperature and relative humidity (RH) of the surrounding air will establish equilibrium moisture content (EMC) conditions, and the moisture content of the wood in that environment will approach a value determined by the RH. When the moisture content changes, shrinking, cupping or crowning can occur. How relative humidity affects wood The relationship between wood moisture, air humidity and air temperature determines what wood will do; expand, shrink or keep its moisture. Wood is stable when no more changes occur; it has reached the equilibrium moisture content.


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Equilibrium moisture content of wood in outdoor locations in the United States and worldwide by William Turner Simpson Download PDF EPUB FB2

United States Department of Agriculture Equilibrium Moisture Forest Service Forest Content of Wood in Products Laboratory Research Outdoor Locations Note FPL–RN in the United States and Worldwide William T. Simpson On Page 1, the equation in column 2 should readFile Size: KB.

Equilibrium moisture content of wood in outdoor locations in the United States and worldwide (SuDoc A FPL-RN) [William Turner Simpson] on *FREE* shipping on qualifying : William Turner Simpson.

Get this from a library. Equilibrium moisture content of wood in outdoor locations in the United States and worldwide. [William Turner Simpson; Forest Products Laboratory (U.S.)]. and moisture content control during transit, storage, and construction.

Data on green moisture content, fiber saturation point, shrinkage, and equilibrium moisture content are given with information on other physical properties in Chapter 3. Wood in service is virtually always undergoing at least slight changes in moisture content.

Changes in File Size: 1MB. Check page 5 of this publication. Note that the link below has EMC values for many locations in the USA.

Equilibrium Moisture Content of Wood in Outdoor Locations in the United States and Worldwide. Note that Burlington, VT ranges from % to % EMC. equilibrium moisture content (emc) of wood, exposed to outdoor atmosphere, in a selection of uk locations.

choose. created date: 7/23/ pm. Climate Normals for were used to determine the average monthly exterior EMC values for locations in the US.

Download EMC’s in the United States’ Location (Excel spreadsheet) Wood Products Notes: The Equilibrium Moisture Content of Wood in Exterior Locations in the United States: An Update. The Equilibrium Moisture Content of Wood in Exterior Locations in the United States: An Update By Phil Mitchell North Carolina State University INTRODUCTION Wood is a hygroscopic material, releasing or adsorbing moisture from the surrounding environment.

In an environment maintained at a constant relative humidity and temperature, the wood will File Size: KB. For example, in the dry mountain air of Denver, the outdoor EMC of wood exposed to outdoor atmosphere in July is %, while New Orleans is % (Forest Products Laboratory: Equilibrium Moisture Content of Wood in Outdoor Locations in the United States and Worldwide, August ).

Equilibrium moisture content of grains. The moisture content of grains is an essential property in food storage. The moisture content that is safe for long-term storage is 12% for corn, sorghum, rice and wheat and 11% for soybean. At a constant relative humidity of air, the EMC will drop by about % for every increase of 10 °C air temperature.

Equilibrium Moisture Content of Wood in Outdoor Locations in the United States and Worldwide. Report using relative humidity and temperature data from NOAA to measure average equilibrium moisture content for each month of the year in locations in the United States and locations outside the United States.

Contact Us. Geographic information system (GIS) maps of monthly outdoor equilibrium moisture content (EMC) of wood in the contiguous United States were prepared from the to Global Climate Normals of the National Climatic Data Center. The data used to create the maps were consistent with those reported by the U.S.

Forest Products Laboratory. By remaining at a set moisture content, the wood is said to be at “equilibrium” with the environment. If a piece of wood is introduced into this temperature and humidity environment, and its starting moisture content is higher than %, then its moisture content will decrease over time and approach the equilibrium value of %.

Equilibrium moisture content definition is - the condition of balance with the moisture content of the air, being in wood equivalent to about 15 percent of moisture at which level wood neither takes on nor loses moisture when exposed to air. Equilibrium moisture content of wood at high temperatures [William Turner Simpson] on *FREE* shipping on qualifying : William Turner Simpson.

GENERAL TECHNICAL REPORT PNW-GTR House Log Drying Rates in Southeast Alaska for Covered and Uncovered Softwood Logs Simpson, W.T. Equilibrium moisture content of wood in outdoor locations in the United States and worldwide.

Res. Note FPL-RN Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory Cited by: 3. Equilibrium Moisture Content (EMC) Chart w this chart provides the equilibrium moisture content for wood based on a shop’s humidity and temperature.

measure the humidity with a hygrometer, check the shop temperature, and look up the numbers in the chart. EQUILIBRIUM MOISTURE CONTENT OF WOOD IN HIGH- TEMPERATURE PRESSURIZED ENVIRONMENTS Christopher A. Lenthl Graduate Research Assistant and Frederick A. Karnke'f Professor Department of Wood Science and Forest Products Virginia Tech Blacksburg, VA (Received December ) ABSTRACT.

It is designed to give the equilibrium moisture content of non-living wood, natural or cut, based on the data entered, at or below the fiber saturation point (about 30% moisture content) given the temperature and relative humidity. The moisture content of wood is directly related to the humidity and temperature of the surrounding air.

The moisture content at which timber neither gains nor loses moisture from the surrounding atmosphere. Equilibrium Moisture Content. non-proprietary information about timber and wood products to professionals and companies involved in project development and.

Equilibrium moisture content during storage, manufacturing, and shipping of Bolivian wood products Omar A. Espinoza' Brian H. Bond" Joseph R.

Loferski* Abstract After lumber is kiln-dried it is important to keep its moisture content (MC) as close as possible to its target value during all stages of production to assure final product : Omar A.

Espinoza, Brian H. Bond, Joseph R. Loferski. The equilibrium moisture content is the point when wood is not losing or gaining water. A piece of wood's moisture content is in constant flux due to external conditions, such as temperature and moisture content of wood is measured by subtracting the wood's mass in its completely dry state from its normal mass, and dividing the total by the dry state mass.Equilibrium Moisture Content of Wood in Outdoor Locations in the United States and Worldwide – A very informative report by the U.S.

Forest Service on the equilibrium moisture content for wood in different regions of the country (and the world) for different times of the year. This information can be used to minimize problems with your.