2 edition of Mechanical properties of western hemlock found in the catalog.
Mechanical properties of western hemlock
O. P. M. Goss
Includes bibliographical references.
|Statement||by O.P.M. Goss.|
|Series||Forest products laboratory series, Bulletin / U.S. Dept. of Agriculture. Forest Service -- 115, Bulletin (United States. Forest Service) -- 115.|
|LC Classifications||SD11 .A2 no. 115|
|The Physical Object|
|Pagination||45 p., 5 leaves of plates (some folded) :|
|Number of Pages||45|
|LC Control Number||13000074|
Common Name(s): Eastern White Pine Scientific Name: Pinus strobus Distribution: Eastern North America (also widely grown on plantations throughout its natural range) Tree Size: ft ( m) tall, ft m) trunk diameter (historically older-growth trees were much larger) Average Dried Weight: 25 lbs/ft 3 ( kg/m 3) Specific Gravity (Basic, 12% MC), Properties for Visually Graded Dimension Lumber from In-Grade Tests of Full-Size Specimens). Reference design values for visually graded timbers, decking, and some species and grades of dimension lumber are based on pro - visions of ASTM Standard D () (Establishing Structural Grades and Related Allowable Properties for.
Western hemlock (Tsuga heterophylla), mostly found in west coast of North America, is a highly underutilized and low-value timber species, partially because of the presence of wet pockets, which makes wood processing challenging, especially when drying and sawing. The present work studies the modification of western hemlock using a hydrothermal process, which induced significant changes in . Here is the specific gravity of western hemlock (Table ). Example 2 How many cubic meters of solid western hemlock wood are needed to produce one tonne (1, kg) of oven-dry bleached kraft pulp (kappa 30)? Formula 1 gives 10 = [(1, kg – DP) / 1, kg]* solving: DP = kg of oven-dry fiber per tonne of pulp.
Western Hemlock of course is also an important medicine among the coastal First Nations peoples. Like many conifers, the sap or pitch is medicinal, used as a poultice to heal wounds and burns, as well as mixed with fat to form an aromatic salve that is useful as a chest rub for colds, to massage sore muscles, and to protect against sunburn. The following table is Structural Lumber Wood Engineering Properties. Modulus of Elasticity of Wood, Wood Engineering Design Data. Modulus of elasticity also referred to as Tensile Modulus or Young's Modulus. Elastic ratios for various wood species at approximately 12% moisture content - see bottom of webpage. Related Lumber Wood Engineering Data:Missing: western hemlock.
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Mechanical Properties Of Western Hemlock Paperback – February 2, by Oliver Perry Morton Goss (Creator)Format: Paperback.
Additional Physical Format: Online version: Goss, O.P.M. (Oliver Perry Morton), Mechanical properties of western hemlock. Washington, D.C.: U.S. Dept. Properties of western hemlock 6 General description 6 Natural defects Reported 7 Characteristics which distinguish west- ern Literaturehemlock from other species of wood.
7 Properties of western hemlock—Con. Page and their characteristics 8 Mechanical and physical properties 17 properties 38 of western hemlock Download PDF Properties Of Western Hemlock And Their Relation To Uses Of The Wood book full free.
Properties Of Western Hemlock And Their Relation To Uses Of The Wood ava. PDF Book Download Full PDF eBook Free Download. The Distribution and the Mechanical Properties of Alaska Woods. Lorraine Joseph Markwardt — Alfalfa. Author. Comments: Western Hemlock is the largest of the hemlocks, and is one of the most valuable sources of exportable lumber for Canada; the species is also the state tree of Washington.
When compared to Eastern Hemlock (Tsuga canadensis), Western Hemlock generally has narrower growth rings, though both species can have tightly spaced growth rings.
Physical & mechanical properties See chart on pages 18/ Medium texture, with a weight of kg per cubic metre, and a high density, specific gravity and strength- to-weight ratio. Very stiff, with high strength values in bending, tension, horizontal sheer and compression.
Strength Properties 4–3 Common Properties 4–3 Less Common Properties 4–24 Vibration Properties 4–25 Speed of Sound 4–25 Internal Friction 4–26 Mechanical Properties of Clear Straight-Grained Wood 4–26 Natural Characteristics Affecting Mechanical Properties 4–27 Specific Gravity 4–27 Knots 4–27 Slope of Grain 4– Western Hemlock Western hemlock (Tsuga hetero-phylla) is an evergreen tree that may reach 50 m in height.
It is found typically along both the east and west sides of the Coast Range and the Interior wet belt west of the Rocky Mountains.
It has a narrow crown with a characteristically drooping top. It has delicate, feathery foliage and down. For the best in film horror, mystery and the macabre Books • magazines • dvds • posters • collectibles.
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Part II: Publications and articles on the mechanical properties of wood, and timber testing Part III: Publications of the United States Government on the mechanical properties of wood, and timber testing ILLUSTRATIONS Frontispiece Photomicrograph of a small block of western hemlock 1.
Stress-strain diagrams of two longleaf pine beams 2. Properties: Western Hemlock works well with both machine and hand tools.
Experts recommend the use of sharp tools for clean, smooth finishes. The wood takes nails and screws well. systems and one mechanical grading system will be discussed here.
In all three systems, western hemlock, including hemlock cut in Alaska, is sold in a marketing group called Hem–Fir. The Hem–Fir grouping includes western hemlock, California red fir, grand fir, noble fir, Pacific silver fir, and 2.
Mechanical Properties Illustrated 12 Standard Sizes 13 Span Tables 14 Section Properties 16 III. RELATIVE PROPERTIES OF WESTERN SPECIES Dimensional Stability 23 Flame-Spread Ratings and Smoke-Developed Indices 23 Western Hemlock.
Western hemlock is moderately light in weight and moderate in strength. It is moderate in its hardness, stiffness, and shock resistance.
It has moderately large shrinkage, about the same as Douglas-fir. Green hemlock lumber contains considerably more water than Douglas-fir, and requires longer kiln drying time. Western Cedars Select Structural 1, No. 1 1, No. 2Western Hemlock Select Structural 1, No.
1 1, No. 2 1, Western Woods Select Structural 1, Growth: Western Hemlock typically grows feet (m). The tallest Western Hemlock is over feet (73m) tall. The oldest are over years old. Habitat: Seedlings of Western Hemlock often begin life on the decaying wood of “nurse logs.” or stumps in the shade of Douglas Firs.
They usually start out growing slowly in the shade, much faster in full sunlight when an event occurs. The effect of thermal modification (TM) on the color of western hemlock wood and its physical and mechanical properties were investigated.
The focus of this study was the prediction of material. Design values provided herein are for Western softwood species manufactured and shipped by mills in the 12 contiguous Western states and Alaska. Except as otherwise noted, the values are computed in accordance with ASTM standards based on clear-wood tests or.
Eastern hemlock, on the other hand, is a conifer tree that is grown for its foliage and is considered safe and non-poisonous. Its needles are used as a tea.
History/Folklore: The Greeks recognized Western hemlock as a poison. As a convicted prisoner, it was a Western hemlock drink that Socrates was condemned to drink.The Mechanical Properties Of Wood.
By. Samuel J. Record, M.A., M.F. Assistant Professor Of Forest Products, Yale University. Frontispiece. Photomicrograph of a small block of western hemlock. At the top is the cross section showing to the right the late wood of one season's growth, to the left the early wood of the next season.Springwood is whitish to light yellow-brown; summerwood frequently has a purplish or reddish-brown tinge; heartwood not distinct.
Small black streaks often appear in the wood.