AASHTO M 168-2007 Standard Specification for Wood Products《木制品的标准规范》.pdf
《AASHTO M 168-2007 Standard Specification for Wood Products《木制品的标准规范》.pdf》由会员分享,可在线阅读,更多相关《AASHTO M 168-2007 Standard Specification for Wood Products《木制品的标准规范》.pdf(8页珍藏版)》请在麦多课文档分享上搜索。
1、Standard Specification for Wood Products AASHTO Designation: M 168-07 (2016)1Release: Group 2 (June 2016) American Association of State Highway and Transportation Officials 444 North Capitol Street N.W., Suite 249 Washington, D.C. 20001 TS-4e M 168-1 AASHTO Standard Specification for Wood Products A
2、ASHTO Designation: M 168-07 (2016)1Release: Group 2 (June 2016) 1. SCOPE 1.1. This specification provides a compilation of specifications covering commercial grades and species of lumber and other wood products for highway construction as indicated below. More detailed requirements will be found in
3、the various specifications cited for specific products: 1.1.1. Lumber, 1.1.2. Structural glued laminated timber, 1.1.3. Piling, 1.1.4. Posts, and 1.1.5. Structural composite lumber. 1.2. The values stated in SI units are to be regarded as the standard. 2. REFERENCED DOCUMENTS 2.1. AASHTO Standards a
4、nd Publications: M 133, Preservatives and Pressure Treatment Processes for Timber AASHTO LRFD Bridge Design Specifications Standard Specifications for Highway Bridges, Division I 2.2. ASTM Standards: D9, Standard Terminology Relating to Wood and Wood-Based Products D25, Standard Specification for Ro
5、und Timber Piles D245, Standard Practice for Establishing Structural Grades and Related Allowable Properties for Visually Graded Lumber D1165, Standard Nomenclature of Commercial Hardwoods and Softwoods D1990, Standard Practice for Establishing Allowable Properties for Visually-Graded Dimension Lumb
6、er from In-Grade Tests of Full-Size Specimens D2555, Standard Practice for Establishing Clear Wood Strength Values D3737, Standard Practice for Establishing Allowable Properties for Structural Glued Laminated Timber (Glulam) D5456, Standard Specification for Evaluation of Structural Composite Lumber
7、 Products D6570, Standard Practice for Assigning Allowable Properties for Mechanically Graded Lumber 2016 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.TS-4e M 168-2 AASHTO 2.3. AASHTO, American Road and T
8、ransportation Builders Association (ARTBA), The Associated General Contractors of America (AGC) Publication: A Guide to Standardized Highway Barrier Hardware 2.4. National Institute of Standards and Technology (NIST) Standard: Voluntary Product Standard PS 20, American Softwood Lumber Standard 2.5.
9、Joint ANSI/AITC Standard: ANSI/AITC A 190.1, Structural Glued Laminated Timber 3. TERMINOLOGY 3.1. boardlumber that is less than 38 mm standard (2 in. nominal) thickness and greater than 38 mm standard (2 in. nominal) width. Boards less than 140 mm standard (6 in. nominal) width are sometimes called
10、 strips. 3.2. dimensionlumber with a thickness from 38 mm standard (2 in. nominal) up to but not including 114 mm standard (5 in. nominal) and a width of greater than 38 mm standard (2 in. nominal). 3.3. dressed lumberlumber that has been planed (surfaced). 3.4. factory and shop lumberlumber intende
11、d to be cut up for use in further manufacture. It is graded on the percentage of the area that will produce a limited number of cuttings of a specified minimum size and quality. 3.5. grading rules-writing agencyorganizations that write and publish grading rules for lumber based on NIST PS 20 guideli
12、nes and that are accredited by the American Lumber Standards Committee Board of Review or a nationally recognized equivalent system. 3.6. hardwoodgenerally, one of the commercial species groups or one of the botanical groups of trees that have vessels or pores and broad leaves, in contrast to the co
13、nifers or softwoods. The term has no reference to actual hardness of the wood. 3.7. heartwoodthe wood extending from the pith to the sapwood, the cells of which no longer participate in the life process of the tree. Heartwood may contain phenolic compounds, gums, resins, and other materials that usu
14、ally make it darker and more decay resistant than sapwood. 3.8. lumberthe product of the saw and planing mill for which manufacturing is limited to sawing, resawing, passing lengthwise through a standard planing machine, crosscutting to length, and matching. Lumber may be made from either softwood o
15、r hardwood. 3.9. lumber gradequality designation of lumber established in accordance with established grading rules developed and adopted by grading rules-writing agencies, which is certified by either the American Lumber Standards Committee Board of Review or a nationally recognized equivalent syst
16、em. 3.10. nominal sizeas applied to timber or lumber, the size by which it is known and sold in the market (often differs from actual size). 3.11. rough lumberlumber that has not been dressed (surfaced) but has been sawed, edged, and trimmed. 3.12. softwood (conifers)generally, one of the botanical
17、groups of trees that have needle-like or scale-like leaves. 2016 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.TS-4e M 168-3 AASHTO 3.13. stress-graded lumberlumber that has been graded based on grading ru
18、les developed, adopted, and published by grading rules-writing agencies that have been certified by the American Lumber Standards Committee Board of Review or an equivalent system; or lumber having assigned working stresses and modulus of elasticity values in accordance with accepted basic principle
19、s of strength grading and the provisions of NIST PS 20. 3.14. structural composite lumberlumber that is a reconstituted (manufactured) lumber product for structural applications, which is either laminated veneer lumber or parallel strand lumber bonded with an exterior adhesive. 3.15. structural glue
20、d laminated timberan engineered, stress-rated product of a timber laminating plant, comprising assemblies of specially selected and prepared wood laminations securely bonded together with adhesives. The grain of all laminations is approximately parallel longitudinally. The laminations may be compose
21、d of pieces end joined to form any length, of pieces placed or bonded edge to edge to make any width, or of pieces bent to curved form during bonding.structural lumberlumber that is intended for use where allowable properties are required. The structural lumber grade is based on the strength or stif
22、fness of the piece as related to anticipated use. 3.16. timberlumber that is standard 114 mm (nominal 5 in.) or more in the least dimension. 3.17. worked lumberlumber that has been dressed, matched, shiplapped, and/or patterned. 3.18. yard lumbera little-used term for lumber of all sizes and pattern
23、s that is intended for general building purposes and that has no design property requirements. 3.19. other wood or wood-based product related terminology and definitionsfor other general terminology and definitions related to wood or wood-based products, other than those listed above, refer to ASTM
24、D9. 4. CLASSIFICATION 4.1. Species of Wood: 4.1.1. The standard commercial and botanical names of the species of wood recognized in this specification are as described in ASTM D1165. 4.1.1.1. Some species may be covered under more than one set of grading rules. In such cases, the applicable grading
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
5000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- AASHTOM1682007STANDARDSPECIFICATIONFORWOODPRODUCTS 木制品 标准规范 PDF

链接地址:http://www.mydoc123.com/p-417678.html