Lake Park Trees
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Lvl) Having Different Patterns of Assembly
PEER-REVIEWED ARTICLE bioresources.com MECHANICAL PROPERTIES ANALYSIS AND RELIABILITY ASSESSMENT OF LAMINATED VENEER LUMBER (LVL) HAVING DIFFERENT PATTERNS OF ASSEMBLY a,b a, Bing Xue, and Yingcheng Hu * Laminated Veneer Lumber (LVL) panels made from poplar (Populus ussuriensis Kom.) and birch (Betula platyphylla Suk.) veneers were tested for mechanical properties. The effects of the assembly pattern on the modulus of elasticity (MOE) and modulus of rupture (MOR) of the LVL with vertical load testing were investigated. Three analytical methods were used: composite material mechanics, computer simulation, and static testing. The reliability of the different LVL assembly patterns was assessed using the method of Monte-Carlo. The results showed that the theoretical and ANSYS analysis results of the LVL MOE and MOR were very close to those of the static test results, and the largest proportional error was not greater than 5%. The veneer amount was the same, but the strength and reliability of the LVL made of birch veneers on the top and bottom was much more than the LVL made of poplar veneers. Good assembly patterns can improve the utility value of wood. Keywords: Laminated veneer lumber (LVL); Mechanical properties; Assembly pattern; Reliability; Poplar; Birch Contact information: a: Key Laboratory of Bio-based Material Science and Technology of Ministry of Education of China, College of Material Science and Engineering, Northeast Forestry University, Harbin, 150040, China; b: Heilongjiang Institute of Science and Technology, Harbin, 150027, China; * Corresponding author: [email protected] INTRODUCTION Wood is a hard fibrous tissue found in many plants. It has many favorable properties such as its processing ability, physical and mechanical properties, and aesthetics, as well as being environmentally and health friendly. -
Comparative Analysis of the Properties of Tamarack (Larix Laricina (Du Roi) K
Lakehead University Knowledge Commons,http://knowledgecommons.lakeheadu.ca Electronic Theses and Dissertations Electronic Theses and Dissertations from 2009 2014 Comparative analysis of the properties of tamarack (Larix laricina (Du Roi) K. Koch) particleboard and thermally treated oriented strand board (OSB) Wang, Le http://knowledgecommons.lakeheadu.ca/handle/2453/1637 Downloaded from Lakehead University, KnowledgeCommons COMPARATIVE ANALYSIS OF THE PROPERTIES OF TAMARACK {Larix laricina (Du Roi) K. Koch) PARTICLEBOARD AND THERMALLY TREATED ORIENTED STRAND BOARD (OSB) Le Wang A thesis submitted to the faculty of graduate studies Lakehead University in partial fulfillment of the requirements for the degree of Master of Science in Forestry Wood Science and Technology Lakehead University Copyright © Le Wang 2014 ProQuest Number: '10611966 All rights reserved INFORMATION TO ALL USERS The quality of this reproduction is dependent upon the quality of the copy submitted. In the unlikely event that the author did not send a complete manuscript and there are missing pages, these will be noted. Also, if material had to be removed, a note will indicate the deletion. ProOuest ProQuest 10611966 Published by ProQuest LLC (2017). Copyright of the Dissertation is held by the Author. All rights reserved. This work is protected against unauthorized copying under Title 17, United States Code Microform Edition ® ProQuest LLC. ProQuest LLC. 789 East Eisenhower Parkway P.O. Box 1346 Ann Arbor, Ml 48106 - 1346 ABSTRACT Engineered wood products (EWPs), for example, particleboard and oriented strand board (OSB), are normally made from wood residuals or small particles of under- utilized wood species for replacing solid sawn products as its cost effective, more uniform, and a more efficient method of using available timber resources. -
Properties of Western Larch and Their Relation to Uses of the Wood
TECHNICAL BULLETIN NO. 285 MARCH, 1932 PROPERTIES OF WESTERN LARCH AND THEIR RELATION TO USES OF THE WOOD BY R. P. A. JOHNSON Engineer, Forest Products Laboratory AND M. I. BRADNER In Charge^ Office of Forest Products y Region I Branch of Research, Forest Service UNITED STATES DEPARTMENT OF AGRICULTURE, WASHINGTON, D. C. TECHNICAL BULLETIN NO. 285 MARCH, 1932 UNITED STATES DEPARTMENT OF AGRICULTURE WASHINGTON, D. C. PROPERTIES OF WESTERN LARCH AND THEIR RELATION TO USES OF THE WOOD By R. P. A. JOHNSON, Engineer, Forest Products Laboratory^^ and M. I. BRADNER, in Charge, Office of Forest Products, Region 1, Branch of Research, Forest Service * CONTENTS Page Page Introduction 1 Mechanical and physical properties—Con. The larch-fir mixture 2 Resistance to decay, weathering, and Character and range of the western larch insects 39 forest __ 4 Reaction to preservative treatment 42 Occurrence 4 Heat and insulating properties 42 Character 4 Permeability by liquids 42 Size of stand 7 Tendency to impart odor or ñavor___:. _. 43 Cut and supply 9 Tendency to leach or exude extractives. _ 43 Merchandising practices 10 Chemical properties 43 distribution lO Fire resistance ., 43 Percentage of cut going into various lum- Characteristic defects of western larch 44 ber items 12 Natural defects 44 Descriptive properties of western larch 13 Seasoning defects 46 General description of the wood 13 Manufacturing defects 47 Heartwood content of lumber 13 Grades and their characteristics 47 Growth rings 14 Grade yield and production 48 Summer-wood content 14 Heartwood content 50 Figure. 14 Width of rings 50 How to distinguish western larch from other Grade descriptions . -
Susceptibility of Larch, Hemlock, Sitka Spruce, and Douglas-Fir to Phytophthora Ramorum1
Proceedings of the Sudden Oak Death Fifth Science Symposium Susceptibility of Larch, Hemlock, Sitka Spruce, and 1 Douglas-fir to Phytophthora ramorum Gary Chastagner,2 Kathy Riley,2 and Marianne Elliott2 Introduction The recent determination that Phytophthora ramorum is causing bleeding stem cankers on Japanese larch (Larix kaempferi (Lam.) Carrière) in the United Kingdom (Forestry Commission 2012, Webber et al. 2010), and that inoculum from this host appears to have resulted in disease and canker development on other conifers, including western hemlock (Tsuga heterophylla (Raf.) Sarg.), Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), grand fir (Abies grandis (Douglas ex D. Don) Lindl.), and Sitka spruce (Picea sitchensis (Bong.) Carrière), potentially has profound implications for the timber industry and forests in the United States Pacific Northwest (PNW). A clearer understanding of the susceptibility of these conifers to P. ramorum is needed to assess the risk of this occurring in the PNW. Methods An experiment was conducted to examine the susceptibility of new growth on European (L. decidua Mill.), Japanese, eastern (L. laricina (Du Roi) K. Koch), and western larch (L. occidentalis Nutt.); western and eastern hemlock (T. canadensis (L.) Carrière); Sitka spruce; and a coastal seed source of Douglas-fir to three genotypes (NA1, NA2, and EU1) of P. ramorum in 2011. In 2012, a similar experiment was conducted using only the four larch species. Container-grown seedlings or saplings were used in all experiments. Five trees or branches of each species were inoculated with a single isolate of the three genotypes by spraying the foliage with a suspension of zoospores (105/ml). -
Big Trees in the Southern Forest Inventory
United States Department of Big Trees in the Southern Agriculture Forest Inventory Forest Service Southern Christopher M. Oswalt, Sonja N. Oswalt, Research Station and Thomas J. Brandeis Research Note SRS–19 March 2010 Abstract or multiple years. Listings of big trees encountered during the most recent forest inventory activities in the South Big trees fascinate people worldwide, inspiring respect, awe, and oftentimes, even controversy. This paper uses a modified version of are reported in this research note and should supplement American Forests’ Big Trees Measuring Guide point system (May 1990) existing lists and registers. to rank trees sampled between January of 1998 and September of 2007 on over 89,000 plots by the Forest Service, U.S. Department of Agriculture, For more than 75 years, the FIA Program has been charged Forest Inventory and Analysis Program in the Southern United States. Trees were ranked across all States and for each State. There were 1,354,965 by Congress to “make and keep current a comprehensive trees from 12 continental States, Puerto Rico, and the U.S. Virgin Islands inventory and analysis of the present and prospective sampled. A bald cypress (Taxodium distichum) in Arkansas was the biggest conditions of and requirements for the renewable resources tree (according to the point system) recorded in the South, with a diameter of the forest and rangelands of the United States” of 78.5 inches and a height of 93 feet (total points = 339.615). The tallest tree recorded in the South was a 152-foot tall pecan (Carya illinoinensis) in (McSweeney-McNary Act of May 22, 1928. -
Western Larch, Which Is the Largest of the American Larches, Occurs Throughout the Forests of West- Ern Montana, Northern Idaho, and East- Ern Washington and Oregon
Forest An American Wood Service Western United States Department of Agriculture Larch FS-243 The spectacular western larch, which is the largest of the American larches, occurs throughout the forests of west- ern Montana, northern Idaho, and east- ern Washington and Oregon. Western larch wood ranks among the strongest of the softwoods. It is especially suited for construction purposes and is exten- sively used in the manufacture of lumber and plywood. The species has also been used for poles. Water-soluble gums, readily extracted from the wood chips, are used in the printing and pharmaceutical industries. F–522053 An American Wood Western Larch (Lark occidentalis Nutt.) David P. Lowery1 Distribution Western larch grows in the upper Co- lumbia River Basin of southeastern British Columbia, northeastern Wash- ington, northwest Montana, and north- ern and west-central Idaho. It also grows on the east slopes of the Cascade Mountains in Washington and north- central Oregon and in the Blue and Wallowa Mountains of southeast Wash- ington and northeast Oregon (fig. 1). Western larch grows best in the cool climates of mountain slopes and valleys on deep porous soils that may be grav- elly, sandy, or loamy in texture. The largest trees grow in western Montana and northern Idaho. Western larch characteristically occu- pies northerly exposures, valley bot- toms, benches, and rolling topography. It occurs at elevations of from 2,000 to 5,500 feet in the northern part of its range and up to 7,000 feet in the south- ern part of its range. The species some- times grows in nearly pure stands, but is most often found in association with other northern Rocky Mountain con- ifers. -
Identification of Conifer Trees in Iowa This Publication Is Designed to Help Identify the Most Common Trees Found in Iowa
Identification of Conifer Trees in Iowa This publication is designed to help identify the most common trees found in Iowa. It is based on vegetative characteristics including leaves, fruit, and bark. It is neither complete nor without possible oversights. Separate species are grouped by similar characteristics, mainly based on type and arrangement of leaves. These groups are; awl- or scale- like needles; single needles, flattened with rounded tips; single needles, square in cross section, with pointed tips; and needles in bundles or fasticles of two or more. Remember, vegetative character- istics are quite variable; use more than one specimen for comparison. Awl- or scale-like needles Juniperus Virginiana Eastern Red Cedar Leaves are dark green; leaves are both awl- and scale-like; cone is dark blue and berry-like. Thuja occidentalis Northern White Cedar Leaves are flattened and only of the scale type; cones have 4-6 scales; foliage is light green. Juniperus communis Common Juniper Leaves are awl shaped; cone is dark blue and berry-like. Pm-1383 | May 1996 Single needles, flattened with rounded tips Pseudotsuga menziesii Douglas Fir Needles occur on raised pegs; 3/4-11/4 inches in length; cones have 3-pointed bracts between the cone scales. Abies balsamea Abies concolor Balsam Fir White (Concolor) Fir Needles are blunt and notched at Needles are somewhat pointed, the tip; 3/4-11/2 inches in length. curved towards the branch top and 11/2-3 inches in length; silver green in color. Single needles, Picea abies Norway Spruce square in cross Needles are 1/2-1 inch long; section, with needles are dark green; foliage appears to droop or weep; cone pointed tips is 4-7 inches long. -
Hyde Park Historical Record (Vol
' ' HYDE PARK ' ' HISTORICAL RECORD ^ ^ VOLUME IV : 1904 ^ ^ ISe HYDE PARK HISTORICAL SOCIETY j< * HYDE PARK, MASSACHUSETTS * * HYDE PARK HISTORICAL RECORD Volume IV— 1904 PUBLISHED BY THE HYDE PARK HISTORICAL SOCIETY HYDE PARK, MASS. PRESS OF . THE HYDE PARK GAZETTE . 1904 . OFFICERS FOR J904 President Charles G. Chick Recording Secretary Fred L. Johnson Corresponding Secretary and Librarian Henry B. Carrington, 19 Summer Street, Hyde Park, Mass. Treasurer Henry B. Humphrey Editor William A. Mowry, 17 Riverside Square, Hyde Park, Mass. Curators Amos H. Brainard Frank B. Rich George L. Richardson J. Roland Corthell. George L. Stocking Alfred F. Bridgman Charles F. Jenney Henry B, Carrington {ex ofido) CONTENTS OF VOLUME IV. THEODORE DWIGHT WELD 5-32 IVi'lliam Lloyd Garrison, "J-r., Charles G. Chick, Henry B. Carrington, Mrs. Albert B. Bradley, Mrs. Cordelia A. Pay- son, Wilbur H. Po'vers, Francis W. Darling; Edtvard S. Hathazvay. JOHN ELIOT AND THE INDIAN VILLAGE AT NATICK . 33-48 Erastus Worthington. GOING WEST IN 1820. George L. Richardson .... 49-67 EDITORIAL. William A. Mowry 68 JACK FROST (Poem). William A. Mo-vry 69 A HYDE PARK MEMORIAL, 18SS (with Ode) .... 70-75 Henry B- Carrington. HENRY A. RICH 76, 77 William y. Stuart, Robert Bleakie, Henry S. Bunton. DEDICATION OF CAMP MEIGS (1903) 78-91 Henry B. Carrington, Augustus S. Lovett, BetiJ McKendry. PROCEEDINGS OF THE SOCIETY SINCE 1892 . 92-100 Fred L. 'Johnso7i. John B. Bachelder. Henry B- Carrington, Geo. M. Harding, yohn y. E7ineking ..... 94, 95 Gov. F. T. Greenhalge. C. Fred Allen, John H. ONeil . 96 Annual Meeting, 1897. Charles G. -
Common Conifers in New Mexico Landscapes
Ornamental Horticulture Common Conifers in New Mexico Landscapes Bob Cain, Extension Forest Entomologist One-Seed Juniper (Juniperus monosperma) Description: One-seed juniper grows 20-30 feet high and is multistemmed. Its leaves are scalelike with finely toothed margins. One-seed cones are 1/4-1/2 inch long berrylike structures with a reddish brown to bluish hue. The cones or “berries” mature in one year and occur only on female trees. Male trees produce Alligator Juniper (Juniperus deppeana) pollen and appear brown in the late winter and spring compared to female trees. Description: The alligator juniper can grow up to 65 feet tall, and may grow to 5 feet in diameter. It resembles the one-seed juniper with its 1/4-1/2 inch long, berrylike structures and typical juniper foliage. Its most distinguishing feature is its bark, which is divided into squares that resemble alligator skin. Other Characteristics: • Ranges throughout the semiarid regions of the southern two-thirds of New Mexico, southeastern and central Arizona, and south into Mexico. Other Characteristics: • An American Forestry Association Champion • Scattered distribution through the southern recently burned in Tonto National Forest, Arizona. Rockies (mostly Arizona and New Mexico) It was 29 feet 7 inches in circumference, 57 feet • Usually a bushy appearance tall, and had a 57-foot crown. • Likes semiarid, rocky slopes • If cut down, this juniper can sprout from the stump. Uses: Uses: • Birds use the berries of the one-seed juniper as a • Alligator juniper is valuable to wildlife, but has source of winter food, while wildlife browse its only localized commercial value. -
Phytosanitary Measures for Wood Commodities
PHYTOSANITARY MEASURES FOR WOOD COMMODITIES Dr. Andrei Orlinski, EPPO Secretariat Joint UNECE // FAO and WTO Workshop Emerging Trade Measures in Timber Markets Geneva, 2010-03-23 What is EPPO? • Intergovernmental organization • Headquarters in Paris • 50 member countries • 2 Working Parties • More than 20 panels of experts • EPPO website: www.eppo.org EPPO Region Why phytosanitary measures are necessary? • The impact of pests on forests is very important. According to FAO data, at least 35 million hectares of forests worldwide are damaged annually by insect pests only. • The highest risk is caused by introduction and spread of regulated pests with commodities Why phytosanitary measures are necessary? • Some examples of economic and environmental damage: - PWN: in Portugal, almost 24 mln euros spent during 2001 – 2009, in Spain, 344000 euros spent in 2009 and almost 3 mln euros will be spent in 2010, in Japan 10 mln euros are spent annually. - EAB: 16 species of ash could disappear from NA - ALB and CLB: Millions of trees recently killed in NA - DED: almost all elm trees disappeared in Europe Emerald ash borer in Moscow Native range of Fraxinus excelsior R U S S I A in Europe Moscow Asian longhorned beetle Ambrosia beetles Pine wood Nematode Pine wood nematode in Japan Basic principles 1. SOVEREIGNTY 9. COOPERATION 2. NECESSITY 10. EQUIVALENCY 3. MANAGED RISK 11. MODIFICATION 4. MINIMAL IMPACT 5. TRANSPARENCY 6. HARMONIZATION 7. NON DISCRIMINATION 8. TECHNICAL JUSTIFICATION Wood commodities • Non-squared wood • Squared wood • Particle -
Victoria-Park-Tree-Walk-2-Web.Pdf
Opening times Victoria Park was London’s first The park is open every day except Christmas K public ‘park for the people’. K Day 7.00 am to dusk. Please be aware that R L Designed in 1841 by James A closing times fluctuate with the seasons. The P A specific closing time for the day of your visit is Pennethorne, it covers 88 hectares A I W listed on the park notice boards located at and contains over 4,500 trees. R E O each entrance. Trees are the largest living things on E T C Toilets are opened daily, from 10.00 am until R the planet and Victoria Park has a I V T one hour before the park is closed. variety of interesting specimens, Getting to the park many of which are as old as the park itself. Whatever the season, as you Bus: 277 Grove Road, D6 Grove Road, stroll around take time to enjoy 8 Old Ford Road their splendour, whether it’s the Tube: Mile End, Bow Road, Bethnal Green regimental design of the formal DLR: Bow Church tree-lined avenues, the exotic trees Rail: Hackney Wick (BR North London Line) from around the world or, indeed West Walk the evidence of the destruction caused by the great storm of 1987 that reminds us of the awesome power of nature. The West Walk is one of three Victoria Park tree walks devised by Tower Hamlets Council. We hope you enjoy your visit, if you have any comments or questions about trees please contact the Arboricultural department on 020 7364 7104. -
Evaluation of the Feeding Value of Leaves of Woody Plants for Feeding
Evaluation of the feeding value of leaves of woody plants for feeding ruminants in summer Jean Claude Emile, Remy Delagarde, Philippe Barre, Vincent Niderkorn, Sandra Novak To cite this version: Jean Claude Emile, Remy Delagarde, Philippe Barre, Vincent Niderkorn, Sandra Novak. Evaluation of the feeding value of leaves of woody plants for feeding ruminants in summer. 19. Symposium of the European Grassland Federation (EGF), May 2017, Alghero, Italy. hal-01608208 HAL Id: hal-01608208 https://hal.archives-ouvertes.fr/hal-01608208 Submitted on 2 Jun 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Distributed under a Creative Commons Attribution - ShareAlike| 4.0 International License Evaluation of the feeding value of leaves of woody plants for feeding ruminants in summer Emile J.C.1, Delagarde R.2, Barre P.3, Niderkorn V.4 and Novak S.1 1INRA, UE 1373 Ferlus, 86600 Lusignan, France; 2Pegase UMR 1348 INRA-Agrocampus Ouest, 35590 Saint-Gilles, France; 3INRA, UR 4 URP3F, 86600 Lusignan, France; 4INRA, UMR 1213 Herbivores, Vetagro Sup, 63122, Saint-Genès-Champanelle, France Abstract The nutritive value of a set of 10 woody forage resources (Italian alder, ash, chestnut, field elm, hazel, lime, black locust, white mulberry, holm oak and vine) was investigated.