ASTM D5764-97a(2007)
(Test Method)Standard Test Method for Evaluating Dowel-Bearing Strength of Wood and Wood-Based Products
Standard Test Method for Evaluating Dowel-Bearing Strength of Wood and Wood-Based Products
SIGNIFICANCE AND USE
The localized crushing behavior of wood or wood-base products beneath a fastener where the fastener does not bend provides a material property that is used in theoretical models for connections where crushing or fastener bending, or both, occur. These theoretical models are used to establish design values for wood and wood-base connections. The tests are appropriate when studying the effects of such variables as fastener diameter, fastener hole size, moisture content, specific gravity, and grain direction on the dowel-bearing strength.
SCOPE
1.1 This test method provides the basic procedure for evaluating dowel-bearing strength of wood and wood-based products. The bearing test results are used to determine the static load resistance and deformation characteristics of connections in wood and wood-base products resulting from the application of a load transmitted by a fastener inserted into a predrilled hole, or driven without drilling. Methods are given for preparing specimens with predrilled holes larger than the fastener diameter and specimens with holes produced by inserting fasteners in holes smaller than the fastener diameter. The methods apply to fasteners such as dowels, bolts, nails, spikes, drift pins, screws, lag screws, and staples.
1.2 This test method also provides the basis for determining the compression behavior of wood products beneath a laterally loaded fastener where the thickness of the product and the diameter of the fastener are such that minimal bending of the fastener occurs during testing.
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.
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Designation:D5764 −97a(Reapproved 2007)
Standard Test Method for
Evaluating Dowel-Bearing Strength of Wood and Wood-
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Based Products
This standard is issued under the fixed designation D5764; 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 E4 Practices for Force Verification of Testing Machines
1.1 This test method provides the basic procedure for
3. Terminology
evaluating dowel-bearing strength of wood and wood-based
products. The bearing test results are used to determine the 3.1 Definitions:
static load resistance and deformation characteristics of con- 3.1.1 dowel-bearing behavior—the load-deformation be-
nections in wood and wood-base products resulting from the havior of wood or wood-base products laterally loaded by a
application of a load transmitted by a fastener inserted into a fastener where the fastener does not bend during loading.
predrilled hole, or driven without drilling. Methods are given
3.1.2 dowel-bearing strength—yield load obtained from the
for preparing specimens with predrilled holes larger than the
load-deformation curve of a dowel-bearing test divided by the
fastener diameter and specimens with holes produced by
dowel diameter and specimen thickness.
inserting fasteners in holes smaller than the fastener diameter.
The methods apply to fasteners such as dowels, bolts, nails,
4. Summary of Test Method
spikes, drift pins, screws, lag screws, and staples.
4.1 Specimens consisting of a single rectangular parallele-
1.2 This test method also provides the basis for determining
pipedmemberwithafastenerholeperpendiculartothefacesof
the compression behavior of wood products beneath a laterally
the member are evaluated for the resistance to embedding the
loaded fastener where the thickness of the product and the
fastener into the fastener hole, so as not to bend the fastener.
diameter of the fastener are such that minimal bending of the
Tests are conducted on a testing machine at a uniform
fastener occurs during testing.
deformation rate, while loads and deformation are measured at
various intervals. Supplementary physical properties of the
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the wood or wood-base member are also determined.
responsibility of the user of this standard to establish appro-
5. Significance and Use
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
5.1 The localized crushing behavior of wood or wood-base
products beneath a fastener where the fastener does not bend
2. Referenced Documents
provides a material property that is used in theoretical models
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2.1 ASTM Standards:
for connections where crushing or fastener bending, or both,
D143 Test Methods for Small Clear Specimens of Timber
occur. These theoretical models are used to establish design
D2395 Test Methods for Specific Gravity of Wood and
values for wood and wood-base connections. The tests are
Wood-Based Materials
appropriate when studying the effects of such variables as
D2915 Practice for Sampling and Data-Analysis for Struc-
fastener diameter, fastener hole size, moisture content, specific
tural Wood and Wood-Based Products
gravity, and grain direction on the dowel-bearing strength.
D4442 Test Methods for Direct Moisture Content Measure-
ment of Wood and Wood-Base Materials
6. Apparatus
6.1 Testing Machine—Any suitable testing machine capable
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of operation at a constant rate of motion of its movable head
This test method is under the jurisdiction of ASTM Committee D07 on Wood
and is the direct responsibility of Subcommittee D07.05 on Wood Assemblies.
and having an accuracy of 61 % when calibrated in accor-
Current edition approved July 1, 2007. Published July 2007. Originally approved
dance with Practices E4.
in 1995. Last previous edition approved in 2002 as D5764 – 97a (2002). DOI:
10.1520/D5764-97AR07.
6.2 Deformation Gage—A deformation-measuring device,
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
with a least reading of 0.001 in. (0.025 mm) for measuring the
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
movement of the fastener into the wood or wood-base speci-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. men.
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D5764−97a (2007)
7. Sampling 2. Minimum dimensions shall be made large enoug
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