1、Designation:F157517Standard 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 pare
2、ntheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers procedures for determining thebending yield moment of nails when subjected to staticloading.It is intended only for nails used i
3、n 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
4、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.1.4 This international standard was developed in accor-dance with internationally
5、 recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2E4 Practices for Fo
6、rce Verification of Testing MachinesF1667 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 load a
7、nd 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 deformed shanka nail shank that has been mechani-cally deformed with annular rings,barbs,helical flutes,etc.fort
8、he purpose of improved withdrawal capacity.3.1.2.1 fully deformed shanka nail shank that has defor-mation along the entire length.3.1.2.2 partially deformed shanka nail shank that that hasboth smooth and deformed sections along the length.3.1.3 proportional limit loadis the load at which theload-def
9、ormation curve deviates from a straight line fitted tothe initial portion of the load-deformation curve.(See Fig.1)3.1.4 transition zonethe location of the transition fromsmooth shank to deformed shank on a partially deformed-shank nail.3.1.5 yield theorythe model for lateral load design valuesfor d
10、owel-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 calcu
11、lated for the various yield modes being taken asthe design 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 va
12、rious 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
13、 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.1This test method is under the jurisdiction of ASTM Comm
14、ittee F16 onFasteners and is the direct responsibility of Subcommittee F16.05 on Driven andOther Fasteners.Current edition approved March 15,2017.Published April 2017.Originallyapproved in 1995.Last previous edition approved in 2013 as F1575 03(2013).DOI:10.1520/F1575-17.2For referenced ASTM standar
15、ds,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.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,
16、100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international 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)Committee.1 6.Apparatus6.1 Testing MachineAny suitable testing machine capableof operation at a constant rate of moti