CSA O141-2005 Softwood lumber (Fifth Edition Update No 1 August 2010).pdf

1、O141-05(reaffirmed 2014)Softwood LumberLegal Notice for StandardsCanadian Standards Association (CSA) standards are developed through a consensus standards development process approved by the Standards Council of Canada. This process brings together volunteers representing varied viewpoints and inte

2、rests to achieve consensus and develop a standard. Although CSA administers the process and establishes rules to promote fairness in achieving consensus, it does not independently test, evaluate, or verify the content of standards.Disclaimer and exclusion of liabilityThis document is provided withou

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13、ole purpose of reviewing it;.search and browse this document; and.print this document. Limited copies of this document in print or paper form may be distributed only to persons who are authorized by CSA to have such copies, and only if this Legal Notice appears on each such copy.In addition, users m

14、ay not and may not permit others to.alter this document in any way or remove this Legal Notice from the attached standard;.sell this document without authorization from CSA; or.make an electronic copy of this document.If you do not agree with any of the terms and conditions contained in this Legal N

15、otice, you may not load or use this document or make any copies of the contents hereof, and if you do make such copies, you are required to destroy them immediately. Use of this document constitutes your acceptance of the terms and conditions of this Legal Notice.Update No. 1O141-05August 2010Note:

16、General Instructions for CSA Standards are now called Updates. Please contact CSA Information Products Sales or visit www.ShopCSA.ca for information about the CSA Standards Update Service.Title: Softwood lumber originally published January 2005The following revisions have been formally approved and

17、are marked by the symbol delta () in the margin on the attached replacement pages:Revised Contents, Preface, Clauses 2, 3, 6.1, 7.1.27.1.4, 8.1, 8.4.2, C.1, and D.1, Tables 1 and 2, and Note (2) to Annex C.New Annex FDeleted NoneCSA O141-05 originally consisted of 41 pages (vii preliminary and 34 te

18、xt), each dated January 2005. It now consists of the following pages:January 2005 v, vi, 710, 1318, 2730, 33, and 34August 2010 iii, iv, vii, 16A, 11, 12, 1926, 31, 32, and 35 Update your copy by inserting these revised pages.Keep the pages you remove for reference.Contents Canadian Standards Associ

19、ation Softwood lumberAugust 2010Technical Committee on Solid and Engineered Wood Products ivSubcommittee on Softwood Lumber viPreface vii1 Scope 12 Reference publications 23 Definitions 24 Canadian Standard Lumber designation 45 Classification 56 Measurement 57 Standard sizes 57.1 General 57.2 Lengt

20、hs 67.2.1 Standard 67.2.2 Trimmed 68 Grading rules 69 Identification (grade stamps and certificates) 710 Accreditation board and grading agency responsibilities 910.1 Accreditation board 910.2 Grading agencies 1011 Determination of design properties 10AnnexesA (informative) Canadian Lumber Standards

21、 Accreditation Board 16B (informative) Canadian softwood and hardwood species 18C (informative) Lumber terminology 20D (informative) Lumber industry abbreviations 29E (informative) Metric dimensions 34F (informative) National Lumber Grades Authority 35Tables1 Nominal and minimum-surfaced sizes for C

22、anadian Standard Lumber (all species except western red cedar and eastern white cedar) 112 Nominal and minimum-surfaced sizes for Canadian Standard Lumber (western red cedar and eastern white cedar) 123 Nominal and minimum-dressed dry sizes of finish, flooring, ceiling, partition, and stepping at 19

23、% maximum moisture content 134 Nominal and minimum-dressed dry sizes of siding at 19% maximum moisture content 145 Nominal and minimum-dressed dry and green sizes of worked lumber 15iii(Replaces p. iii, January 2005)O141-05 Canadian Standards AssociationAugust 2010Technical Committee on Solid and En

24、gineered Wood ProductsC. Lum Forintek Canada Corp.,Vancouver, British ColumbiaChairY.H. Chui Wood Science and Technology Centre,Fredericton, New BrunswickVice-ChairP.M. Trott Canadian Wood Council, Ottawa, OntarioSecretaryP. Audet Boise Cascade AllJoist Lte,Dorval, QubecS.J. Boyd Quaile Engineering

25、Ltd., Newmarket, OntarioL.F. Cass Alberta Municipal Affairs,Edmonton, AlbertaP.A. Cooper University of Toronto,Toronto, OntarioJ.A. Dangerfield Forintek Canada Corp.,Vancouver, British ColumbiaAssociateB. Di Lenardo Canadian Construction Materials Centre,Ottawa, OntarioK. Fargey Western Archrib,Edmo

26、nton, AlbertaA.S. Garden Canfor Wood Products Marketing Ltd.,Vancouver, British ColumbiaB. Hintz Jager Building Systems Inc.,Calgary, AlbertaE.D. Jones Canadian Wood Council, Ottawa, OntarioAssociateA.W. Kempthorne Canadian Plywood Association, North Vancouver, British ColumbiaAssociateF. Lam Univer

27、sity of British Columbia, Vancouver, British ColumbiaR. Lee Ainsworth Lumber Company Limited,Vancouver, British ColumbiaT.V. Leung Thomas Leung Structural Engineering, Inc.,Vancouver, British Columbia(Replaces p. iv, January 2005)iv Canadian Standards Association Softwood lumberAugust 2010PrefaceThi

28、s is the fifth edition of CSA O141, Softwood lumber. It supersedes the previous editions published in 1991, 1970, 1965, and 1959.The technical content of this Standard is intended to be consistent with NIST PS 20-10, American Softwood Lumber Standard.Like previous editions of this Standard, this edi

29、tion is written in yard/pound units to meet the needs of both consumers and producers. SI (metric) values are provided in parentheses for information only.This Standard was prepared by the Subcommittee on Softwood Lumber, under the jurisdiction of the Technical Committee on Solid and Engineered Wood

30、 Products and the Strategic Steering Committee on Forest Products, and has been formally approved by the Technical Committee.January 2005Notes: (1) Use of the singular does not exclude the plural (and vice versa) when the sense allows.(2) Although the intended primary application of this Standard is

31、 stated in its Scope, it is important to note that it remains the responsibility of the users of the Standard to judge its suitability for their particular purpose.(3) This publication was developed by consensus, which is defined by CSA Policy governing standardization Code of good practice for stan

32、dardization as “substantial agreement. Consensus implies much more than a simple majority, but not necessarily unanimity”. It is consistent with this definition that a member may be included in the Technical Committee list and yet not be in full agreement with all clauses of this publication.(4) CSA

33、 Standards are subject to periodic review, and suggestions for their improvement will be referred to the appropriate committee.(5) All enquiries regarding this Standard, including requests for interpretation, should be addressed to Canadian Standards Association, 5060 Spectrum Way, Suite 100, Missis

34、sauga, Ontario, Canada L4W 5N6. Requests for interpretation should(a) define the problem, making reference to the specific clause, and, where appropriate, include an illustrative sketch;(b) provide an explanation of circumstances surrounding the actual field condition; and(c) be phrased where possib

35、le to permit a specific “yes” or “no” answer.Committee interpretations are processed in accordance with the CSA Directives and guidelines governingstandardization and are published in CSAs periodical Info Update, which is available on the CSA Web site atwww.csa.ca.vii(Replaces p. vii, January 2005)

36、Canadian Standards Association Softwood lumberAugust 2010O141-05Sof twood lumber1 Scope1.1 This Standard specifies requirements pertaining to the quality and uniformity of softwood lumber manufactured in Canada and establishes the designation “Canadian Standard Lumber” for lumber that meets the requ

37、irements of this Standard (see Clause 4).1.2 This Standard covers the following topics:(a) classification;(b) measurement; (c) standard sizes;(d) grading rules;(e) identification (grade stamps and certificates); and(f) accreditation board and grading agency responsibilities.This Standard also includ

38、es detailed Annexes covering lumber terminology and lumber industry abbreviations.1.3 This Standard does not cover trade practices, grades (other than grading rules and identification), the details of accreditation board and grading agency inspection procedures, or strength values.1.4 Although this

39、Standard applies to softwood lumber, it may be applied to hardwood lumber used in applications that ordinarily use softwood lumber.1.5 In CSA Standards, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is u

40、sed to express a recommendation or that which is advised but not required; “may” is used to express an option or that which is permissible within the limits of the standard; and “can” is used to express possibility or capability. Notes accompanying clauses do not include requirements or alternative

41、requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mand

42、atory) to define their application.1.6 In keeping with the practice of lumber manufacturers throughout North America, sizes in this Standard are given in board measure units, which are expressed in yard/pound units (see Clause 6.1). Equivalent SI (metric) sizes, rounded to the nearest millimetre, ar

43、e given in parentheses for the sake of convenience in use and in commercial transactions. The values given in yard/pound units are the standard. The values given in parentheses are for information only. See Annex E for a discussion of how metric dimensions have been calculated for this Standard.1(Re

44、places p. 1, January 2005)O141-05 Canadian Standards AssociationAugust 20102 Reference publicationsThis Standard refers to the following publications, and where such reference is made, it shall be to the edition listed below, including all amendments published thereto.CSA (Canadian Standards Associa

45、tion)CSA O86-09Engineering Design in WoodAmerican Forest and Paper AssociationNational Design Specification for Wood Construction, 2005ASTM International (American Society for Testing and Materials)D 4444-08Standard Test Methods for Laboratory Standardization and Calibration of Hand-Held Moisture Me

46、tersD 7438-08Standard Practice for Field Calibration and Application of Hand-Held Moisture MetersSI 10-02IEEE/ASTM SI 10 American National Standard for Use of the International System of Units (SI): The Modern Metric SystemCanadian Lumber Standards Accreditation BoardRegulations, 2009Canadian Wood C

47、ouncilMetric Manual for Wood Products, 1983FPInnovations-Forintek DivisionJessome, A.P. 2000. Strength and related properties of woods grown in Canada. Special Publication SP-514E. Sainte-Foy, QC: Forintek Canada Corp. 37 p.Government of CanadaCanada Corporations Act, RSC 1970, c. C-32National Lumbe

48、r Grades AuthorityStandard Grading Rules for Canadian Lumber, 2008National Research Council CanadaNational Building Code of Canada, 2005NIST (National Institute of Standards and Technology)PS 20-10American Softwood Lumber Standard3 DefinitionsNote: See Annex C for additional definitions.The followin

49、g definitions apply in this Standard:Accreditation a procedure by which an authoritative body grants formal recognition that a body or person is competent to carry out specific tasks.(Replaces p. 2, January 2005)2 Canadian Standards Association Softwood lumberAugust 2010Accreditation board an organization engaged in the accreditation of grading agencies and in the inspection of grading agencies and their licensees (see Clause 10.1 and Annex A).Board measure a system for measuring lumber based on the nom