ASTM F3359-18
(Test Method)Standard Test Method for Determining Bending Yield Moment of Staples
Standard Test Method for Determining Bending Yield Moment of Staples
SIGNIFICANCE AND USE
5.1 Staples are mechanical fasteners used in wood structures. Engineering design procedures used to determine the capacities of laterally-loaded staple connections use a yield theory to establish nominal resistance (Note 1). In order to develop nominal resistance for laterally-loaded stapled connections, the bending yield moment must be known.
Note 1: When used as a structural fastener in shear walls and diaphragms, staples are installed with the crown parallel to the long dimension of the framing member. The orientation of the staples for this bending yield moment test represents the bending yield moment applicable for this intended use).
SCOPE
1.1 This test method covers procedures for determining the bending yield moment of staples when subjected to static loading. Although intended for flat crown staples identified in Specification F1667, this procedure is also applicable for staples with round wire. These staples are used in engineered wood building connection applications for which required connection capacities are specified by the designer.
1.2 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:F3359 −18
Standard Test Method for
1
Determining Bending Yield Moment of Staples
This standard is issued under the fixed designation F3359; 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 3.1.2 flat crown staple—a two-pronged fasteners in which
round or flattened wire is bent into an approximate U-shape
1.1 This test method covers procedures for determining the
with approximately equivalent leg lengths.
bending yield moment of staples when subjected to static
3.1.3 flat crown staple dimensions—All dimensions taken
loading. Although intended for flat crown staples identified in
before application of or after removal of any coating, as shown
Specification F1667, this procedure is also applicable for
in Fig. 1.
staples with round wire. These staples are used in engineered
wood building connection applications for which required
3.1.3.1 crown width (C)—Distance measured along the top
connection capacities are specified by the designer.
of the staple from the outside of the staple legs.
1.2 The values stated in inch-pound units are to be regarded
3.1.3.2 leg length (L)—Distance from top of staple crown to
as standard. No other units of measurement are included in this
bottom of leg.
standard.
3.1.3.3 thickness (T)—Distance perpendicular to the width
1.3 This standard does not purport to address all of the
of the leg for a flattened wire staple.
safety concerns, if any, associated with its use. It is the
3.1.3.4 test span (S )—Cylindrical bearing point spacing
bp
responsibility of the user of this standard to establish appro-
(test span length) as shown in Fig. 2.
priate safety, health, and environmental practices and deter-
3.1.3.5 width (W)—Distance across the flatten portion of
mine the applicability of regulatory limitations prior to use.
wire.
1.4 This international standard was developed in accor-
3.1.4 proportional limit load—is the load at which the
dance with internationally recognized principles on standard-
load-deflection curve deviates from a straight line fitted to the
ization established in the Decision on Principles for the
initial portion of the load- deflection curve as shown in Fig. 3.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
3.1.5 yield load (P)—the load determined from the load-
Barriers to Trade (TBT) Committee.
deflection curve in accordance with 9.1.
3.1.6 yield theory—the model for lateral load design values
2. Referenced Documents
for dowel-type fasteners that specifically accounts for the
2
2.1 ASTM Standards:
different way connections behave under load.
E4 Practices for Force Verification of Testing Machines
F1667 Specification for Driven Fasteners: Nails, Spikes, and
4. Summary of Test Method
Staples
4.1 Test specimens are evaluated to determine capacity to
resist lateral bending loads applied at a constant rate of
3. Terminology
deflection with a suitable testing machine. The load on the test
3.1 Definitions of Terms Specific to This Standard:
specimen at various intervals of deflection is measured.
3.1.1 bending yield moment (M )—the critical strength char-
y
Supplementaryphysicalpropertiesofthetestspecimenarealso
acteristic used in yield theory calculations and determined in
determined.
accordance with 9.2.
5. Significance and Use
1 5.1 Staples are mechanical fasteners used in wood struc-
This test method is under the jurisdiction of ASTM Committee F16 on
Fasteners and is the direct responsibility of Subcommittee F16.05 on Driven and
tures. Engineering design procedures used to determine the
Other Fasteners.
capacities of laterally-loaded staple connections use a yield
Current edition approved Dec. 1, 2018. Published January 2019. DOI: 10.1520/
theory to establish nominal resistance (Note 1). In order to
F3359–18
2
develop nominal resistance for laterally-loaded stapled
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
connections, the bending yield moment must be known.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. NOTE 1—When used as a structural fastener in shear walls and
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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F3359−18
FIG. 1Flat Crown Staple Dimensions
FIG. 2Cylindrical bearing point spacing
FIG. 3Load- Deflection Curve
diaphragms, staples are installed with the crown parallel to the long bending yield moment test
...
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