ASTM D7989-15
(Practice)Standard Practice for Demonstrating Equivalent In-Plane Lateral Seismic Performance to Wood-Frame Shear Walls Sheathed with Wood Structural Panels
Standard Practice for Demonstrating Equivalent In-Plane Lateral Seismic Performance to Wood-Frame Shear Walls Sheathed with Wood Structural Panels
SIGNIFICANCE AND USE
5.1 This practice documents cyclic performance benchmarks for shear walls constructed with wood structural panel (WSP) sheathing attached to dimension lumber framing using common or box nails as defined in 3.2.8.
5.2 Procedures described in this practice provide a method to evaluate an alternative shear wall system’s SEPs to demonstrate equivalent in-plane lateral seismic performance to the reference shear wall system.
5.3 The procedures described in this practice do not address all factors to be considered for recognition of an alternative shear wall system. Such factors, as described in 1.4, vary by the end-use application and shall be addressed outside the scope of this standard through an evaluation of the acceptability of the alternative shear wall system in accordance with requirements of building codes and standards, as applicable.
SCOPE
1.1 This practice establishes a method for alternative shear wall systems to compare seismic equivalency parameters (SEP) derived from cyclic in-plane racking tests to performance targets derived from tests of light-frame shear walls constructed with wood structural panel (WSP) sheathing attached to dimension lumber framing using nails.
1.2 This practice considers only the performance of shear walls subject to cyclic lateral loading, parallel to the plane of the shear wall. Design of walls with openings and performance for other wall functions, such as out-of-plane bending, combined shear and uplift, etc. are not considered.
1.3 This practice is applicable only to shear walls where all vertical-load-supporting elements are intact at the end of the in-plane lateral load test and remain capable of supporting gravity loads. Wall assemblies whose vertical-load-supporting elements buckle or otherwise become incapable of supporting gravity loads during the lateral load test are outside the scope of this practice. In addition, for bearing wall systems, this practice assumes that the shear wall system under evaluation has documented design procedures to ensure that vertical-load-supporting elements have adequate resistance to the combined effect of compression loads caused by overturning and gravity loads.
1.4 This practice does not address height limitations, detailing requirements, wall openings, derivation of design values for strength and stiffness, or other requirements and limitations that may be necessary for an alternative shear wall system. These requirements shall be provided elsewhere, such as by a suitable product standard for the alternative shear wall system.
1.5 This practice assumes that the stiffness or deformation of the alternative shear wall system can be estimated, and that design loads within a structure will be distributed among seismically equivalent wall systems based on their relative stiffness.
1.6 This practice is not intended to preclude other rational means of evaluating seismic performance.
1.7 This practice assumes that the alternative shear wall system may be used alone or in combination with wood-frame shear walls sheathed with wood structural panels.
1.8 Units—The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.9 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
General Information
Standards Content (Sample)
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Designation: D7989 − 15
Standard Practice for
Demonstrating Equivalent In-Plane Lateral Seismic
Performance to Wood-Frame Shear Walls Sheathed with
1
Wood Structural Panels
This standard is issued under the fixed designation D7989; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 1.6 This practice is not intended to preclude other rational
means of evaluating seismic performance.
1.1 This practice establishes a method for alternative shear
wall systems to compare seismic equivalency parameters 1.7 This practice assumes that the alternative shear wall
(SEP) derived from cyclic in-plane racking tests to perfor- system may be used alone or in combination with wood-frame
mance targets derived from tests of light-frame shear walls shear walls sheathed with wood structural panels.
constructed with wood structural panel (WSP) sheathing at-
1.8 Units—The values stated in inch-pound units are to be
tached to dimension lumber framing using nails.
regarded as standard. The values given in parentheses are
1.2 This practice considers only the performance of shear mathematical conversions to SI units that are provided for
walls subject to cyclic lateral loading, parallel to the plane of information only and are not considered standard.
the shear wall. Design of walls with openings and performance
1.9 This standard does not purport to address all of the
for other wall functions, such as out-of-plane bending, com-
safety concerns, if any, associated with its use. It is the
bined shear and uplift, etc. are not considered.
responsibility of the user of this standard to establish appro-
1.3 This practice is applicable only to shear walls where all priate safety and health practices and determine the applica-
vertical-load-supporting elements are intact at the end of the bility of regulatory limitations prior to use.
in-plane lateral load test and remain capable of supporting
2. Referenced Documents
gravity loads. Wall assemblies whose vertical-load-supporting
2
elements buckle or otherwise become incapable of supporting
2.1 ASTM Standards:
gravity loads during the lateral load test are outside the scope
E2126 Test Methods for Cyclic (Reversed) Load Test for
of this practice. In addition, for bearing wall systems, this
Shear Resistance ofVertical Elements of the Lateral Force
practice assumes that the shear wall system under evaluation
Resisting Systems for Buildings
has documented design procedures to ensure that vertical-load-
F1667 Specification for Driven Fasteners: Nails, Spikes, and
supporting elements have adequate resistance to the combined
Staples
effect of compression loads caused by overturning and gravity
2.2 Other Documents:
loads.
PS1-09 Structural Plywood, U.S. Department of Commerce
Voluntary Product Standard
1.4 This practice does not address height limitations, detail-
PS2-10 Performance Standard for Wood-Based Structural
ing requirements, wall openings, derivation of design values
Use Panels, U.S. Department of Commerce Voluntary
for strength and stiffness, or other requirements and limitations
Product Standard
that may be necessary for an alternative shear wall system.
These requirements shall be provided elsewhere, such as by a
3. Terminology
suitable product standard for the alternative shear wall system.
3.1 Definitions—The definitions in Test Methods E2126
1.5 This practice assumes that the stiffness or deformation
also apply to this practice.
of the alternative shear wall system can be estimated, and that
design loads within a structure will be distributed among 3.2 Definitions Specific to this Practice:
3.2.1 aspect ratio, n—ratio of a shear wall’s height divided
seismically equivalent wall systems based on their relative
by its length.
stiffness.
1 2
This test method is under the jurisdiction of ASTM Committee D07 on Wood For referenced ASTM standards, visit the ASTM website, www.astm.org, or
and is the direct responsibility of Subcommittee D07.05 on Wood Assemblies. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Dec. 1, 2015. Published February 2016. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
D7989-15. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D7989 − 15
3.2.2 allowable design load, n—maximum in-plane racking 4.3 Seismic equivalency is established if each of the SEPs
resistance assigned to a tested shear wall configuration for for the alt
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