ASTM_D_7989_-_21.pdf

Designation:D798921Standard Practice forDemonstrating Equivalent In-Plane Lateral SeismicPerformance to Wood-Frame Shear Walls Sheathed withWood Structural Panels1This standard is issued under the fixed designation D7989;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 practice establishes a method for alternative shearwall systems to compare seismic equivalency parameters(SEP)derived from cyclic in-plane racking tests to perfor-mance targets derived from tests of light-frame shear wallsconstructed with wood structural panel(WSP)sheathing at-tached to dimension lumber framing using nails.1.2 This practice considers only the performance of shearwalls subject to cyclic lateral loading,parallel to the plane ofthe shear wall.Design of walls with openings and performancefor other wall functions,such as out-of-plane bending,com-bined shear and uplift,and so forth are not considered.1.3 This practice is applicable only to shear walls where allvertical-load-supporting elements are intact at the end of thein-plane lateral load test and remain capable of supportinggravity loads.Wall assemblies whose vertical-load-supportingelements buckle or otherwise become incapable of supportinggravity loads during the lateral load test are outside the scopeof this practice.In addition,for bearing wall systems,thispractice assumes that the shear wall system under evaluationhas documented design procedures to ensure that vertical-load-supporting elements have adequate resistance to the combinedeffect of compression loads caused by overturning and gravityloads.1.4 This practice does not address height limitations,detail-ing requirements,wall openings,derivation of design valuesfor strength and stiffness,or other requirements and limitationsthat may be necessary for an alternative shear wall system.These requirements shall be provided elsewhere,such as by asuitable product standard for the alternative shear wall system.1.5 This practice assumes that the stiffness or deformationof the alternative shear wall system can be estimated,and thatdesign loads within a structure will be distributed amongseismically equivalent wall systems based on their relativestiffness.1.6 This practice is not intended to preclude other rationalmeans of evaluating seismic performance.1.7 This practice assumes that the alternative shear wallsystem may be used alone or in combination with wood-frameshear walls sheathed with wood structural panels.1.8 UnitsThe values stated in inch-pound units are to beregarded as standard.The values given in parentheses aremathematical conversions to SI units that are provided forinformation only and are not considered standard.1.9 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 environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.10 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 Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1ASTM Standards:2E2126 Test Methods for Cyclic(Reversed)Load Test forShear Resistance of Vertical Elements of the Lateral ForceResisting Systems for BuildingsF1667 Specification for Driven Fasteners:Nails,Spikes,andStaples2.2 Other Documents:PS1 Structural Plywood,U.S.Department of CommerceVoluntary Product Standard3PS2 Performance Standard for Wood-Based Structural Use1This practice is under the jurisdiction of ASTM Committee D07 on Wood andis the direct responsibility of Subcommittee D07.05 on Wood Assemblies.Current edition approved Nov.1,2021.Published December 2021.Originallyapproved in 2015.Last previous edition approved in 2020 as D7989 20.DOI:10.1520/D7989-21.2For 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.3Online,Available:https:/www.nist.gov/system/files/documents/2019/12/16/PS%201%2019%20final%20WERB-approved%20%28NIST%20vers%2011-18-2019%29%2B.pdfCopyright ASTM International,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 Techni