CSA S347-2014 Method of test for evaluation of truss plates used in lumber joints (Fourth Edition).pdf

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18、347-14March 2014Title: Method of test for evaluation of truss plates used in lumber jointsTo register for e-mail notification about any updates to this publication go to shop.csa.ca click on CSA Update ServiceThe List ID that you will need to register for updates to this publication is 2422891.If yo

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20、orm whatsoever withoutthe prior permission of the publisher.Published in March 2014 by CSA GroupA not-for-profit private sector organization5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N6To purchase standards and related publications, visit our Online Store at shop.csa.caor call t

21、oll-free 1-800-463-6727 or 416-747-4044.TMA trade-mar k of the Canadian S tandards Association, operating as “CSA Group”Methodof test for evaluationof trussplatesused in lumberjointsS347-14S347-14Method of test for evaluation of truss plates used in lumber jointsMarch 2014 2014 CSA Group 1ContentsTe

22、chnical Committee on Engineering Design in Wood 3Task Group on Tests for Evaluation of Truss Plates 6Preface 71 Scope 82 Reference publications 83 Definitions 94 Apparatus 105 Test material 105.1 Truss plate design 105.2 Nails 115.3 Sawn lumber 115.4 Truss grade structural composite lumber 116 Sampl

23、ing 116.1 General 116.2 Sawn lumber for test specimens 116.3 Truss grade structural composite lumber for test specimens 116.4 Truss plates for testing 127 Test specimens 127.1 Manufacture 127.2 Lumber members 127.3 Embedment methods 127.4 Required tests 127.4.1 General 127.4.2 Lateral resistance of

24、teeth 127.4.3 Tensile strength of plate 137.4.4 Shear strength of plate 137.4.5 Ultimate tensile strength of plate material 147.5 Roller press lateral resistance tests 147.5.1 General 147.5.2 Embedment method 147.5.3 Required tests 147.6 Moisture response tests for truss plate joints in structural c

25、omposite lumber 147.6.1 General 147.6.2 Required tests 147.6.3 Moisture cycling 158 Test procedure 158.1 General 15S347-14Method of test for evaluation of truss plates used in lumber jointsMarch 2014 2014 CSA Group 28.2 Accuracy 158.3 Testing 158.4 Oven-dry relative density and moisture content 169

26、Calculations 169.1 General 169.2 Unit lateral resistance 169.3 Correction factor for strength of plate material 169.4 Characteristic tensile strength of plate 169.5 Characteristic shear strength of plate 179.6 Modification factors for roller pressing 179.6.1 Roller press modification factor for ulti

27、mate strength, Kpu179.6.2 Roller press modification factor for slip, Kps179.7 Moisture response factor for structural composite lumber joints 179.7.1 Residual strength ratio 179.7.2 Residual slip ratio 179.7.3 Moisture Response factor for ultimate strength, Kmu189.7.4 Moisture Response factor for sl

28、ip, Kms1810 Report 18S347-14Method of test for evaluation of truss plates used in lumber jointsMarch 2014 2014 CSA Group 3Technical Committeeon EngineeringDesign in WoodG.C. Williams Timber Systems Limited,Markham,OntarioCategory: ProducerInterestChairS.J. Boyd Quaile Engineering Ltd,Newmarket, Onta

29、rioCategory: User InterestVice-ChairD. Bowick Blackwell Structural Engineers,Toronto, OntarioCategory: User InterestY.H. Chui University of New Brunswick,Fredericton, New BrunswickCategory: Governmentand/or Regulatory AuthorityK.J. Dick Building Alternatives Inc.,Anola, ManitobaCategory: User Intere

30、stB. Di Lenardo National Research Council,Ottawa, OntarioCategory: Governmentand/or Regulatory AuthorityG. Doudak University of Ottawa,Ottawa, OntarioCategory: Governmentand/or Regulatory AuthorityG.A. Epp Fast b) introduction of test requirements for machine stress rated lumber, machine evaluated l

31、umber andstructural composite lumber;c) introduction of additional tests for roller press embedment of truss plates; andd) updating of calculations and reporting to suit changes in truss plate analysis requirements inCSA O86.The plate and teeth resistance and the teeth lateral slip resistance, deter

32、mined in accordance with thisStandard, provide the basis for the truss plate connection design and design values set forth in CSA O86,Engineeringdesign in wood.This Standard was prepared by the Technical Committee on Engineering Design in Wood under thejurisdiction of the Strategic Steering Committe

33、e on Buildings and Civil Infrastructure and was formallyapproved by the Technical Committee.Notes: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 stated in its Scope, it is important to note th

34、at itremains the responsibility of the users of the Standard to judge its suitability for their particular purpose.3) This Standard was developed by consensus, which is defined by CSA Policy governing standardization Codeof good practice for standardization as “substantial agreement. Consensus impli

35、es much more than a simplemajority, but not necessarily unanimity”. It is consistent with this definition that a member may be included inthe Technical Committee list and yet not be in full agreement with all clauses of this Standard.4) To submit a request for interpretation of this Standard, please

36、 send the following information toinquiriescsagroup.org and include “Request for interpretation” in the subject line:a) define the problem, making reference to the specific clause, and, where appropriate, include anillustrative sketch;b) provide an explanation of circumstances surrounding the actual

37、 field condition; andc) where possible, phrase the request in such a way that a specific “yes” or “no” answer will address theissue.Committee interpretations are processed in accordance with the CSA Directives and guidelines governingstandardization and are available on the Current Standards Activit

38、ies page at standardsactivities.csa.ca.5) This Standard is subject to review five years from the date of publication and suggestions for its improvementwill be referred to the appropriate committee. To submit a proposal for change, please send the followinginformation to inquiriescsagroup.org and in

39、clude “Proposal for change” in the subject line:a) Standard designation (number);b) relevant clause,table, and/or figure number;c) wording of the proposed change; andd) rationale for the change.S347-14Method of test for evaluation of truss plates used in lumber jointsMarch 2014 2014 CSA Group 8S347-

40、14Methodof test for evaluationof truss platesused in lumberjoints1 Scope1.1This Standard provides basic procedures based on joint ultimate load or a limiting slip for thedetermination of the lateral strength resistance and lateral slip resistance of truss plate teeth embeddedin sawn and structural c

41、omposite lumber members.1.2This Standard provides for the determination of the lateral strength resistance and lateral slip resistanceof nails embedded in lumber members when used in nail-on truss plates. When this Standard is soapplied,the word “tooth” is understood to be replaced by the word “nail

42、”.1.3This Standard provides basic procedures based on truss plate ultimate strength for the determination ofthe tensile and shear strengths of the net section of the plates.1.4The capacities determined by testing methods and procedures described herein, and corrected for thevariations in the ultimat

43、e tensile strength of the plate material used in the manufacture of the test trussplates, will yield values that may be adjusted for use in engineering design, such as specified in CSA O86.1.5In this Standard,“shall” is used to express a requirement, i.e., a provision that the user is obliged tosati

44、sfy in order to comply with the standard; “should” is used to express a recommendation or thatwhich is advised but not required; and “may” is used to express an option or that which is permissiblewithin the limits of the standard.Notes accompanying clauses do not include requirements or alternative

45、requirements; the purpose of anote 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 asrequirements.Annexes are designated normative (mandatory) or informative (non-mandator

46、y)to define theirapplication.2 Reference publicationsThis Standard refers to the following publications and where such reference is made it shall be to theedition listed below.S347-14Method of test for evaluation of truss plates used in lumber jointsMarch 2014 2014 CSA Group 9CSA GroupO86-14Engineer

47、ingdesign in woodO141-05 (R2009)Softwood lumberASTM International (American Society for Testing and Materials)D2395-07ae1Standard Test Methods for Specific Gravity of Wood and Wood-Based MaterialsD4442-07Standard Test Methods for Direct Moisture Content Measurementof Wood and Wood-Base MaterialsD545

48、6-13aStandard Specification for Evaluation of Structural Composite Lumber ProductsD7438-13Standard Practice for Field Calibration and Application of Hand-Held Moisture MetersE4-13Standard Practices for Force Verification of Testing MachinesE8/E8M-11aStandard Test Methods for Tension Testing of Metal

49、lic MaterialsNLGA (NationalLumber Grades Authority)Standard Grading Rules for Canadian Lumber (2014)SPS 2-2013Special Products Standard for Machine Graded LumberNRCC (NationalResearch Council Canada)National Building Code of Canada (2010) (2015 edition in preparation)3 Definitions3.1The following definitions shall apply in this Standard:Engineer a person in the engineering profession with specific expertise in truss plates used in lumberjoints who is licensed to practice in a jurisdiction in Canada.Machine-evaluated (MEL) lumber that has been evaluated by a no