ASTM F3359-2018 Standard Test Method for Determining Bending Yield Moment of Staples.pdf
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1、Designation: F3359 18Standard Test Method forDetermining Bending Yield Moment of Staples1This standard is issued under the fixed designation F3359; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number
2、 in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers procedures for determining thebending yield moment of staples when subjected to staticloading. Although intended for
3、flat crown staples identified inSpecification F1667, this procedure is also applicable forstaples with round wire. These staples are used in engineeredwood building connection applications for which requiredconnection capacities are specified by the designer.1.2 The values stated in inch-pound units
4、 are to be regardedas standard. No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety, health, and envi
5、ronmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standa
6、rds, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2E4 Practices for Force Verification of Testing MachinesF1667 Specification for Driven Fasteners: Nails, Spikes, andStaples3. Terminology3.1 De
7、finitions of Terms Specific to This Standard:3.1.1 bending yield moment (My)the critical strength char-acteristic used in yield theory calculations and determined inaccordance with 9.2.3.1.2 flat crown staplea two-pronged fasteners in whichround or flattened wire is bent into an approximate U-shapew
8、ith approximately equivalent leg lengths.3.1.3 flat crown staple dimensionsAll dimensions takenbefore application of or after removal of any coating, as shownin Fig. 1.3.1.3.1 crown width (C)Distance measured along the topof the staple from the outside of the staple legs.3.1.3.2 leg length (L)Distan
9、ce from top of staple crown tobottom of leg.3.1.3.3 thickness (T)Distance perpendicular to the widthof the leg for a flattened wire staple.3.1.3.4 test span (Sbp)Cylindrical bearing point spacing(test span length) as shown in Fig. 2.3.1.3.5 width (W)Distance across the flatten portion ofwire.3.1.4 p
10、roportional limit loadis the load at which theload-deflection curve deviates from a straight line fitted to theinitial portion of the load- deflection curve as shown in Fig. 3.3.1.5 yield load (P)the load determined from the load-deflection curve in accordance with 9.1.3.1.6 yield theorythe model fo
11、r lateral load design valuesfor dowel-type fasteners that specifically accounts for thedifferent way connections behave under load.4. Summary of Test Method4.1 Test specimens are evaluated to determine capacity toresist lateral bending loads applied at a constant rate ofdeflection with a suitable te
12、sting machine. The load on the testspecimen at various intervals of deflection is measured.Supplementary physical properties of the test specimen are alsodetermined.5. Significance and Use5.1 Staples are mechanical fasteners used in wood struc-tures. Engineering design procedures used to determine t
13、hecapacities of laterally-loaded staple connections use a yieldtheory to establish nominal resistance (Note 1). In order todevelop nominal resistance for laterally-loaded stapledconnections, the bending yield moment must be known.NOTE 1When used as a structural fastener in shear walls and1This test
14、method is under the jurisdiction of ASTM Committee F16 onFasteners and is the direct responsibility of Subcommittee F16.05 on Driven andOther Fasteners.Current edition approved Dec. 1, 2018. Published January 2019. DOI: 10.1520/F3359182For referenced ASTM standards, visit the ASTM website, www.astm.
15、org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis internat
16、ional standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Commit
17、tee.1diaphragms, staples are installed with the crown parallel to the longdimension of the framing member. The orientation of the staples for thisbending yield moment test represents the bending yield moment appli-cable for this intended use).FIG. 1 Flat Crown Staple DimensionsFIG. 2 Cylindrical bea
18、ring point spacingFIG. 3 Load- Deflection CurveF3359 1826. Apparatus6.1 Testing MachineAny suitable testing machine capableof operation at a constant rate of motion of its movable head.6.2 Cylindrical Bearing PointsAny cylindrical metalmembers with a diameter of 0.375 in., capable of supportingthe t
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