ASTM F3359/F3359M-21

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.
Designation: F3359/F3359M −21
Standard Test Method for
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Determining Bending Yield Moment of Staples
ThisstandardisissuedunderthefixeddesignationF3359/F3359M;thenumberimmediatelyfollowingthedesignationindicatestheyear
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 F1667/F1667M Specification for Driven Fasteners: Nails,
Spikes, and Staples
1.1 This test method covers procedures for determining the
bending yield moment of staples when subjected to static
3. Terminology
loading. Although intended for flat crown staples identified in
Specification F1667/F1667M, this procedure is also applicable 3.1 Definitions of Terms Specific to This Standard:
for staples with round wire. These staples are used in engi-
3.1.1 bending yield moment (M )—the critical strength char-
y
neered wood building connection applications for which re-
acteristic used in yield theory calculations and determined in
quired connection capacities are specified by the designer.
accordance with 9.2.
1.2 The values stated in either SI units or inch-pound units
3.1.2 flat crown staple—a two-pronged fasteners in which
are to be regarded separately as standard. The values stated in
round or flattened wire is bent into an approximate U-shape
each system are not necessarily exact equivalents; therefore, to
with approximately equivalent leg lengths.
ensure conformance with the standard, each system shall be
3.1.3 flat crown staple dimensions—All dimensions taken
used independently of the other, and values from the two
before application of or after removal of any coating, as shown
systems shall not be combined.
in Fig. 1.
NOTE 1—This test method is applicable in either inch-pounds F3359 or
3.1.3.1 crown width (C)—Distance measured along the top
SI Units [F3359M].Values stated in SI are a mathematical conversion and
of the staple from the outside of the staple legs.
are shown in brackets [ ].
3.1.3.2 leg length (L)—Distance from top of staple crown to
1.3 This standard does not purport to address all of the
bottom of leg.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3.1.3.3 thickness (T)—Distance perpendicular to the width
priate safety, health, and environmental practices and deter-
of the leg for a flattened wire staple.
mine the applicability of regulatory limitations prior to use.
3.1.3.4 test span (S )—Cylindrical bearing point spacing
bp
1.4 This international standard was developed in accor-
(test span length) as shown in Fig. 2.
dance with internationally recognized principles on standard-
3.1.3.5 width (W)—Distance across the flatten portion of
ization established in the Decision on Principles for the
wire.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
3.1.4 proportional limit load—is the load at which the
Barriers to Trade (TBT) Committee.
load-deflection curve deviates from a straight line fitted to the
initial portion of the load- deflection curve as shown in Fig. 3.
2. Referenced Documents
3.1.5 yield load (P)—the load determined from the load-
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2.1 ASTM Standards:
deflection curve in accordance with 9.1.
E4 Practices for Force Calibration and Verification of Test-
3.1.6 yield theory—the model for lateral load design values
ing Machines
for dowel-type fasteners that specifically accounts for the
different way connections behave under load.
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This test method is under the jurisdiction of ASTM Committee F16 on
4. Summary of Test Method
Fasteners and is the direct responsibility of Subcommittee F16.05 on Driven and
Other Fasteners.
4.1 Test specimens are evaluated to determine capacity to
Current edition approved Dec. 1, 2021. Published January 2022. Originally
resist lateral bending loads applied at a constant rate of
approved in 2018. Last previous edition approved in 2019 as F3359–19. DOI:
10.1520/F3359_F3359M–21
deflection with a suitable testing machine. The load on the test
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
specimen at various intervals of deflection is measured.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Supplementaryphysicalpropertiesofthetestspecimenarealso
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. determined.
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