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GB/T 36872-2018: Code of glued laminated timber production
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Code of glued laminated timber production
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GB/T 36872-2018
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Basic data | Standard ID | GB/T 36872-2018 (GB/T36872-2018) | | Description (Translated English) | Code of glued laminated timber production | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B70 | | Classification of International Standard | 79.060.99 | | Word Count Estimation | 54,558 | | Date of Issue | 2018-09-17 | | Date of Implementation | 2019-04-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 36872-2018: Code of glued laminated timber production---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.
Code of glued laminated timber production
ICS 79.060.99
B70
National Standards of People's Republic of China
Technical specification for production of laminated timber for structure
Published on.2018-09-17
Implementation of.2019-04-01
State market supervision and administration
China National Standardization Administration issued
Content
Foreword III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Requirements 1
4.1 Personnel requirements 1
4.2 Basic conditions 1
4.3 Equipment Condition 1
5 Manufacturing 2
5.1 Sawn timber 2
5.1.1 Tree species 2
5.1.2 Moisture content 2
5.1.3 Layer classification 3
5.1.4 Laminate 3
5.2 Adhesive 3
5.3 Layer configuration 3
5.4 Layer finger joint 4
5.4.1 Finger shape and parameters 4
5.4.2 Gluing 4
5.4.3 Finger joint pressure 4
5.4.4 Curing 4
5.4.5 splicing and slotting in the width direction of the laminate 4
5.5 laminate lamination 4
5.5.1 Laminating surface processing 4
5.5.2 Group blank 5
5.5.3 Adjusting glue 12
5.5.4 Glue 12
5.5.5 Chen Fang 12
5.5.6 Pressurization 12
5.5.7 Curing 12
5.5.8 Pressurization time and curing time during gluing 13
5.6 Bending Glues 13
5.7 Glulam for special structures 13
5.8 Structural Finishing Finishing 13
5.8.1 Structural Gluing Dimensions Allowable Deviation and Appearance Quality 13
5.8.2 Number of layers 14
5.8.3 Material quality grade and requirements 14
5.9 Requirements for the use of wood inserts 14
5.10 Packaging, Transportation 14
6 Quality Control 14
6.1 General requirements 14
6.2 Inspection Summary 14
6.3 Initial inspection 15
6.3.1 Test method 15
6.3.2 Non-longitudinal laminate bending test 15
6.3.3 Longitudinal laminate bending test 15
6.3.4 Longitudinal laminate tensile test 15
6.3.5 Longitudinal laminate boiling peel test 16
6.3.6 Straight laminated timber bending test 16
6.3.7 Tensile laminated timber tensile and compressive test 16
6.3.8 Glulam layer shear test 18
6.3.9 Glulam stripping test 18
6.3.10 Blown stripping test of laminated timber 19
6.3.11 Structural laminated material decompression and pressure peeling test 19
6.3.12 Glue content test of laminated timber 20
6.3.13 Synthetic material formaldehyde emission test 20
6.4 full test 20
6.4.1 General 20
6.4.2 Inspection method 21
6.5 Sampling inspection 24
6.5.1 General 24
6.5.2 Inspection method 24
6.6 Production record of structural laminated timber 25
Appendix A (Normative) Fingering Technical Requirements 27
Appendix B (informative) Correspondence between the strength grades of laminated timbers for some countries and regions
Appendix C (Normative Appendix) Manufacturing method for laminated structures for special structures 31
Appendix D (informative) Example of laminated timber for structural use 1 33
Appendix E (informative) Example of structural composite blanks for construction 2 35
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the National Forestry and Grassland Bureau.
This standard is under the jurisdiction of the National Standardization Technical Committee for Wood-based Panels (SAC/TC198).
This standard was drafted. Beijing Forestry University, Heilongjiang Institute of Wood Science, Northeast Forestry University, China Southwest Design Research
Institute, Harbin Institute of Technology, Institute of Wood Industry, Chinese Academy of Forestry, Dalian Shuanghua Wood Co., Ltd., Daxinganling Shenzhou Arctic Wood Industry
Co., Ltd., Manzhouli Lianzhong Wood Industry Co., Ltd., Suzhou Shengjia Ecological Housing Manufacturing Co., Ltd., Guilin Xinmei Environmental Protection Technology Co., Ltd.
Shanghai Haoyuan Wood Structure Design Engineering Co., Ltd., Jiangxi Guizhu Development Co., Ltd., Henan Yongwei Security Co., Ltd., Zhejiang Shenghua
Yunfeng New Material Co., Ltd.
The main drafters of this standard. Shen Shijie, Bi Kexin, Gu Jiyou, Yang Xuebing, Zhu Enzhen, Zhou Haibin, Liu Hongguang, Fan Yonghua, Cui Zhigang, Zhang Pengyi,
Chen Yong, Wang Qiansheng, Du Hong, Ren Taiping, Xiong Xiaojing, Gu Shuixiang.
Technical specification for production of laminated timber for structure
1 Scope
This standard specifies the terms and definitions, requirements, manufacturing and quality control of the technical specifications for the production of laminated timber for structural use.
This standard applies to the production process and quality control of structural integrated materials.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 26899-2011 structural laminated timber
3 Terms and definitions
The terms and definitions defined in GB/T 26899-2011 apply to this document.
4 requirements
4.1 Personnel requirements
A quality control system certified by a third-party authorized certification body shall be established; production personnel shall strictly implement an eight-hour work system.
And implement the relevant requirements of the quality control system; the production products should be tested online, offline, and daily quality control records, and at least
Archived for ten years.
4.2 Basic conditions
4.2.1 The minimum temperature in the production area is 15 °C. Higher temperatures are required during gluing (see 5.5.7), but this requirement may be limited
Specific area of the precondition (gluing chamber).
4.2.2 Relative humidity. The relative humidity of the air during production should be 30%~75%.
4.2.3 Drying and storage facilities meet the moisture and temperature requirements of wood.
4.2.4 When using pre-dried wood, the storage facility shall maintain the moisture content required by the wood.
4.2.5 Unless the adhesive is directly from the storage tank and is automatically mixed during the gluing process, the mixing chamber should be separately set and adjusted.
Prepare adhesive and curing agent storage facilities and keep the equipment area clean and free of debris.
4.2.6 The use of adhesives and curing agents should be based on the principle of “first in, first out”.
4.3 Equipment conditions
4.3.1 Automatic recorder for continuous monitoring of temperature and humidity in warehouses, production areas and glue zones.
4.3.2 Wood moisture content inspection (calibration) measuring instrument.
4.3.3 Mechanical and visual grading equipment.
4.3.4 Finger pointing equipment.
4.3.5 Laminate thickness measuring instrument.
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