LY/T 1788-2023 English PDFUS$599.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email. LY/T 1788-2023: Vocabulary of wood properties Status: Valid LY/T 1788: Historical versions
Basic dataStandard ID: LY/T 1788-2023 (LY/T1788-2023)Description (Translated English): Vocabulary of wood properties Sector / Industry: Forestry Industry Standard (Recommended) Classification of Chinese Standard: B60 Classification of International Standard: 01.040.79 Word Count Estimation: 30,354 Date of Issue: 2023-06-19 Date of Implementation: 2023-11-01 Issuing agency(ies): State Forestry and Grassland Administration LY/T 1788-2023: Vocabulary of wood properties---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.ICS 01.040.79 CCSB60 Forestry Industry Standard of the People's Republic of China Replace LY/T 1788-2008 Wood property terms Released on 2023-06-19 2023-11-01 Implementation The State Forestry and Grassland Administration issued Table of ContentsPreface I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 3.1 General Concepts 1 3.2 Wood anatomical characteristics 3 3.3 Physical properties of wood 8 3.4 Mechanical properties of wood 11 3.5 Chemical properties of wood 13 3.6 Biological properties of wood 15 3.7 Environmental characteristics of wood 15 Index 17 Reference 26ForewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting is required. This document replaces LY/T 1788-2008 "Terms of Wood Properties". Compared with LY/T 1788-2008, except for structural adjustment and editing, In addition to the changes in performance, the main technical changes are as follows. --- Changed the “wood anatomical characteristics” and “wood environmental characteristics” in the classification (see Chapter 3, Chapter 2 of the.2008 edition); --- Changed the general concepts "strip", "log", "sawn timber", "plank", "square timber", "coniferous timber", "timber identification", "trunk", "quarter-cut timber" Definitions of “tangentially cut timber”, “green timber” and “wood anisotropy” (see 4.1.2~4.1.7, 4.1.9, 4.1.13~4.1.17, 4.1.19,.2008 3.1.2~3.1.7, 3.1.9, 3.1.13~3.1.17, 3.1.19 of the.2017 edition); --- Added the general concepts of "same type stand", "same type forest", "age class", "same age stand", "root neck", "height under branches", "shape rate" and "diameter at breast height" Terms and definitions (see 4.1.20 to 4.1.27); --- Changed the "wood structure", "bark", "xylem", "cambium", "phloem", "cross section", "radial section", "tangential section", "sapwood", "heartwood" and other aspects. Definitions of wood anatomical characteristics (see 4.2.1, 4.2.4~4.2.11, 4.2.13, 4.2.16, 4.2.17, 3.2.2~3.2.9, 3.2.10, 3.2.48, 3.2.49 of the.2008 edition); --- Changed the definitions of wood anatomical characteristics of "growth ring", "growth ring width", "early wood", "late wood", "late wood rate", "intercellular canal" and "gum canal" (See 4.2.19, 4.2.22, 4.2.24~4.2.27, 4.2.29, 3.2.11, 3.2.13~3.2.17 of the.2008 edition); --- Changed "vessel", "non-porous material", "tubular pore type", "pit", "cross-field pit", "axial parenchyma", "off-tubular axial parenchyma" Definitions of wood anatomical features such as “paravascular axial parenchyma”, “wood rays”, “wood fibers”, “pore inclusions”, and “wood cell wall” (see 4.2.33, 4.2.34, 4.2.37, 4.2.41, 4.2.46, 4.2.48~4.2.51, 4.2.53, 4.2.55, 4.2.57, 3.2.28 of the.2008 edition, 3.2.21, 3.2.23, 3.2.42, 3.2.47, 3.2.40, 3.2.41, 3.2.29, 3.2.30, 3.2.32, 3.2.34); --- Added "wood macrostructure", "wood microstructure", "sapwood species", "heartwood species", "mature wood species", "pithelial spots", "false annual rings" "Growth ring boundary", "serrated thickening", "vessel cells", "polymer wood rays", "primary wall", "secondary wall", "tuberous layer", "microfibrils", "spirals "Thickened" wood anatomical characteristics terms and definitions (see 4.2.2, 4.2.3, 4.2.12, 4.2.14, 4.2.15, 4.2.18, 4.2.21, 4.2.23, 4.2.31, 4.2.32, 4.2.52, 4.2.58~4.2.61, 4.2.63); --- Changed "cellulose crystalline area" and "cellulose non-crystalline area" to wood chemical properties, and changed the definition (see 4.5.6 and 4.5.7, 3.2.36 and 3.2.37 of the.2008 edition); --- Changed "Basic density", "Wood moisture content" and "Absolute moisture content", "Equilibrium moisture content", "Free water", "Bound water", "Fiber saturation" Definition of the physical properties of wood (see 4.3.3, 4.3.8, 4.3.9, 4.3.11~4.3.14, 3.3.3, 3.3.5,.2008 edition) 3.3.6, 3.3.7~3.3.10); --- Changed the definitions of wood physical properties such as "wood acoustic properties", "wood thermal properties", "wood thermal conductivity", and "wood thermal conductivity". (See 4.3.23, 4.3.25, 4.3.30, 4.3.31, 3.3.18, 3.3.20, 3.3.25, 3.3.26 of the.2008 edition); --- Added the terms and definitions of wood physical properties such as "absolute dry density", "green density", "substantial density", "relative moisture content", and "shrinkage and swelling" (see 4.3.5~4.3.7,4.3.10,4.3.18); --- Changed the "wood cross-grain compressive strength", "wood parallel tensile strength", "wood parallel shear strength", "wood splitting resistance", "wood nail holding strength" Definition of mechanical properties of wood (see 4.4.6, 4.4.8, 4.4.11, 4.4.15, 4.4.16, 3.4.6, 3.4.8,.2008 edition) 3.4.11, 3.4.15, 3.4.16); --- Added "wood creep", "wood relaxation", "wood bending ability", "wood viscoelasticity", "wood rigidity", "wood plasticity", "wood resistance "Fatigue" Wood Mechanical Properties Terms and Definitions. (See 4.4.21~4.4.27); --- Changed "Wood Chemical Properties", "Wood Chemical Composition", "Cellulose", "Hemicellulose", "Lignin", "Wood Buffer Capacity", "Wood Definition of chemical properties of wood "Extractives" (see 4.5.1, 4.5.3, 4.5.5, 4.5.11, 4.5.12, 4.5.14, 4.5.17,.2008 edition) 3.5.1, 3.5.3, 3.5.5, 3.5.7, 3.5.8, 3.5.10, 3.5.11); --- Added the terms and definitions of wood chemical properties such as "cellulose polymerization degree", "cellulose accessibility", "wood acid content" and "wood acid-base properties". Meaning; (see 4.5.9, 4.5.10, 4.5.15, 4.5.16); --- Changed the definitions of "wood decay" and "blue stain" biological properties of wood (see 4.6.3, 4.6.8, 3.6.3, 3.6.5 of the.2008 edition); --- Added the terms and definitions of wood biological properties such as "mildew" and "wood pests" (see 4.6.9 and 4.6.10); --- Changed the definitions of "wood tactile properties", "wood moisture conditioning properties" and wood environmental properties (see 4.7.3, 4.7.4,.2008 edition) 3.7.3, 3.7.4); --- Added "Biological regulation characteristics of wood", "Spatial acoustic characteristics of wood", "Acoustic radiation quality constant of wood", "Space acoustic properties of wood" "Optical properties of wood", "Environmental properties of wood", "Olfactory properties of wood" Terms and definitions of wood environmental properties (see 4.7.5~4.7.10). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by the State Forestry and Grassland Administration. This document is under the jurisdiction of the National Technical Committee on Timber Standardization (SAC/TC41). This document was drafted by. Wood Industry Research Institute of Chinese Academy of Forestry, Northwest Agriculture and Forestry University, International Bamboo and Rattan Center, Nanjing Forestry University, Xiamen University, Yiliya (Xiamen) Ecological Development Co., Ltd., Beijing Forestry University, and Guangdong Academy of Forestry Sciences. The main drafters of this document are. An Xin, Duan Xinfang, Yu Huaqiang, Feng Dejun, Jin Zhi, Zhang Shuqin, Wang Xuehua, Song Shasha, Li Xiaoling, Wang Chen, Ma Qing, Lian Caiping, Xiang Elin, Mi Bingbing, Liu Rong, Chen Meiling, Yuan Jing, Xu Jinmei, Zhang Ran, Chen Zhiyong, Cao Yongjian, Xie Guijun, Li Wanju, Li Jianing and Zhen Wei. The previous versions of the documents replaced by this document are as follows. ---First published in.2008 as LY/T 1788-2008; ---This is the first revision. Wood property terms1 ScopeThis document defines the general concept of wood and its anatomical characteristics, physical properties, mechanical properties, chemical properties, Terms related to wood biological properties, wood environmental characteristics, etc. This document applies to wood and wood-related areas.2 Normative referencesThis document has no normative references.3 Terms and definitions3.1 General Concepts 3.1.1 Wood Derived from the secondary xylem of trees. Note. It is mainly composed of cellulose, hemicellulose and lignin. 3.1.2 Original longpole; tree-lengthlog The whole trunk of felled trees that have not been processed for timbering after delimbing. 3.1.3 Log The round wood section is formed by cross-cutting the original strip. 3.1.4 Sawntimber; lumber The log is sawn lengthwise to form a product with at least two parallel faces. 3.1.5 Board Sawn timber whose width is at least twice its thickness. 3.1.6 Scantling Sawn timber whose width dimension is less than twice its thickness dimension. 3.1.7 softwood;coniferouswood Wood produced by gymnosperms such as pine, fir, cypress, etc. 3.1.8 hardwood; deciduouswood Wood produced by angiosperms such as poplar, ash, elm, eucalyptus, etc. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of LY/T 1788-2023_English be delivered?Answer: Upon your order, we will start to translate LY/T 1788-2023_English as soon as possible, and keep you informed of the progress. 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