ASTM_F_1575_-_03_2013.pdf

Designation:F157503(Reapproved 2013)Standard Test Method forDetermining Bending Yield Moment of Nails1This standard is issued under the fixed designation F1575;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number 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 nails when subjected to staticloading.It is intended only for nails used in engineeredconnection applications,in which a required connection capac-ity is specified by the designer.1.2 The values stated in inch-pound units 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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E4 Practices for Force Verification of Testing MachinesE1470 Test Method for Characterization of Proteins byElectrophoretic Mobility(Withdrawn 2014)3F1667 Specification for Driven Fasteners:Nails,Spikes,andStaples3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 bending yield momentthe moment determined fromthe load-deformation curve that is intermediate between theproportional limit and maximum load for the nail.It iscalculated by the intersection of the load-deformation curvewith a line represented by the initial tangent modulus offset5%of the fastener diameter.3.1.2 transition zonethe location of the transition fromsmooth shank to threaded shank on a deformed-shank nail.3.1.3 yield theorythe model for lateral load design valuesfor dowel-type fasteners that specifically accounts for thedifferent ways these connections behave under load.Thecapacity of the connection under each yield mode is deter-mined by the bearing strength of the material under the fastenerand the bending strength of the fastener,with the lowestcapacity calculated for the various modes being taken as thedesign load for the connection.4.Summary of Test Method4.1 Test specimens are evaluated to determine capacity toresist lateral bending loads applied at a constant rate ofdeformation with a suitable testing machine.The load on thetest specimen at various intervals of deformation is measured.Supplementary physical properties of the test specimen are alsodetermined.5.Significance and Use5.1 Nails are a common mechanical fastener in woodstructures.Engineering design procedures used to determinethe capacities of laterally-loaded nailed connections currentlyuse a yield theory to establish the nominal resistance forlaterally-loaded nailed connections that are engineered.Inorder to develop the nominal resistance for laterally-loadednailed connections,the bending yield moment must be known.6.Apparatus6.1 Testing MachineAny suitable testing machine capableof operation at a constant rate of motion of its movable headand having an accuracy of 61%when calibrated in accor-dance with Practice E4.6.2 Cylindrical Bearing PointsAny cylindrical metalmember capable of supporting the test specimen during loadingwithout deforming,as shown in Fig.1,and having diameter(D)=0.375 in.6.2.1 Cylindrical bearing points shall be free to rotate as thetest specimen deforms.6.3 Cylindrical Load PointAny cylindrical metal membercapable of loading the test specimen without deforming,asshown in Fig.1,and having diameter(D)=0.375 in.1This test 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 Nov.1,2013.Published March 2014.Originallyapproved in 1995.Last previous edition approved in 2008 as F1575 03(2008).DOI:10.1520/F1575-03R13.2For referenced ASTM standards,visit the ASTM website,www.astm.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.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.4 Recording DeviceAny device with at least a reading of0.001 in.(0.025 mm)and any suitable device for measuring theload on the test specimen during deformation.7.Sampling7.1 Sampling shall provide for selection of representativetest specimens that are appropriate to the objectives of thetesting program.8.Specimens and Tests8.1 Tests for smooth shank nails shall be performed oneither the finished nail or a specimen of drawn wire stock fromwhich the nail would be manufactured.Tests for deformed-shank nails shall be performed on the