ASTM D4761-02a

Standard Test Methods for Mechanical Properties of Lumber and Wood-Base Structural Material

SCOPE
Note 1—A proof load may be used which will permit the determination of a specified strength percentile without testing the total sample to destruction. Designing a test program on the basis of proof loading can be complex, requiring consideration in relation to the objectives of the test program. Guidance on this matter can be found in the paper by Johnson.
1.1 These test methods cover the determination of the mechanical properties of stress-graded lumber and other wood-base structural material.
1.2 These test methods appear in the following order: SectionBending edge-wise6-11Bending flat-wise:Center point loading12-17Third point loading18-23 Axial strength in tension24-29Axial strength in compression 30-35
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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 09-Nov-2002
• ICS: 79.040 - Wood, sawlogs and sawn timber
• ICS: 79.060.01 - Wood-based panels in general
• Technical Committee: D07 - Wood
• Drafting Committee: D07.01 - Fundamental Test Methods and Properties

Relations

• Replaces: ASTM D4761-02 - Standard Test Methods for Mechanical Properties of Lumber and Wood-Base Structural Material
• Effective Date: 10-Nov-2002
• Referred By: ASTM D198-22a - Standard Test Methods of Static Tests of Lumber in Structural Sizes
• Effective Date: 10-Nov-2002
• Referred By: ASTM D8391-22e1 - Standard Specification for Demonstrating Equivalent Fire Performance for Wood-Based Floor Framing Members to Unprotected 2 by 10 Dimension Lumber or Equal-Sized Structural Composite Lumber
• Effective Date: 10-Nov-2002
• Referred By: ASTM D5055-19e1 - Standard Specification for Establishing and Monitoring Structural Capacities of Prefabricated Wood I-Joists
• Effective Date: 10-Nov-2002
• Referred By: ASTM D6815-22a - Standard Specification for Evaluation of Duration of Load and Creep Effects of Wood and Wood-Based Products
• Effective Date: 10-Nov-2002
• Referred By: ASTM D6874-22a - Standard Test Methods for Nondestructive Evaluation of the Stiffness of Wood and Wood-Based Materials Using Transverse Vibration or Stress Wave Propagation
• Effective Date: 10-Nov-2002
• Referred By: ASTM D143-22 - Standard Test Methods for Small Clear Specimens of Timber
• Effective Date: 10-Nov-2002
• Referred By: ASTM D7032-21 - Standard Specification for Establishing Performance Ratings for Wood-Plastic Composite and Plastic Lumber Deck Boards, Stair Treads, Guards, and Handrails
• Effective Date: 10-Nov-2002
• Referred By: ASTM D7672-19 - Standard Specification for Evaluating Structural Capacities of Rim Board Products and Assemblies
• Effective Date: 10-Nov-2002
• Referred By: ASTM D5664-17 - Standard Test Method for Evaluating the Effects of Fire-Retardant Treatments and Elevated Temperatures on Strength Properties of Fire-Retardant Treated Lumber
• Effective Date: 10-Nov-2002
• Referred By: ASTM D6570-18a(2023)e1 - Standard Practice for Assigning Allowable Properties for Mechanically Graded Lumber
• Effective Date: 10-Nov-2002
• Referred By: ASTM D7381-07(2021)e1 - Standard Practice for Establishing Allowable Stresses for Round Timbers for Piles from Tests of Full-Size Material
• Effective Date: 10-Nov-2002
• Referred By: ASTM D5457-23 - Standard Specification for Computing Reference Resistance of Wood-Based Materials and Structural Connections for Load and Resistance Factor Design
• Effective Date: 10-Nov-2002
• Referred By: ASTM D3043-17 - Standard Test Methods for Structural Panels in Flexure
• Effective Date: 10-Nov-2002
• Referred By: ASTM D5456-21e1 - Standard Specification for Evaluation of Structural Composite Lumber Products
• Effective Date: 10-Nov-2002

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D4761–02a
Standard Test Methods for
Mechanical Properties of Lumber and Wood-Base Structural
1
Material
This standard is issued under the fixed designation D4761; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
Numerous evaluations of the mechanical properties of wood-based structural material have been
satisfactorilyconductedsincethelate1920s,usingTestMethodsD198.Thosemethodsarebestsuited
to a laboratory environment and are adaptable to a variety of products such as stress-graded lumber,
sawn timber, laminated timbers, wood-plywood composite members, reinforced and prestressed
timbers.
The procedures presented in these test methods have been derived from those set forth in Test
Methods D198. They are intended primarily for application to stress-graded lumber, but can be used
for other wood-base structural material as well. The procedures are more flexible than those in Test
Methods D198, making testing in a nonlaboratory environment more feasible. Thus the test methods
can be used on production sites for field testing and quality control, as well as in laboratories for
research applications. Key differences from Test Methods D198 are the testing speed, the deflection
measuringproceduresfortestspecimensunderload,andthedetailofdatareporting.Furthermore,the
test methods do not require that specimens be loaded to failure (Note 1).
Since these test methods allow latitude in testing procedures, the procedures used shall be fully
documented in the test report. It may also be desirable to correlate the results from tests carried out
according to these test methods with test results obtained through the use of a traditional procedure
such as set forth in Test Methods D198.
1. Scope
Axial strength in tension 24-29
Axial strength in compression 30-35
NOTE 1—Aproofloadmaybeusedwhichwillpermitthedetermination
1.3 This standard does not purport to address all of the
of a specified strength percentile without testing the total sample to
destruction.Designingatestprogramonthebasisofproofloadingcanbe safety concerns, if any, associated with its use. It is the
complex, requiring consideration in relation to the objectives of the test
responsibility of the user of this standard to establish appro-
2
program. Guidance on this matter can be found in the paper by Johnson.
priate safety and health practices and determine the applica-
1.1 These test methods cover the determination of the
bility of regulatory limitations prior to use.
mechanicalpropertiesofstress-gradedlumberandotherwood-
2. Referenced Documents
base structural material.
1.2 These test methods appear in the following order:
2.1 ASTM Standards:
3
D9 Terminology Relating to Wood
Section
Bending edge-wise 6-11
D198 Test Methods of Static Tests of Lumber in Structural
Bending flat-wise:
3
Sizes
Center point loading 12-17
Third point loading 18-23 D2915 Practice for Evaluating Allowable Properties for
3
Grades of Structural Lumber
D4442 TestMethodsforDirectMoistureContentMeasure-
3
1
These test methods are under the jurisdiction of ASTM Committee D07 on ment of Wood and Wood-Base Materials
4
Wood and are the direct responsibility of Subcommittee D07.01 on Fundamental
E4 Practices for Force Verification of Testing Machines
Test Methods & Properties.
Current edition approved Nov. 10, 2002. Published January 2003. Originally
approved in 1988. Last previous edition approved in 2002 as D4761–02.
2 3
“Current Statistical Methods for Estimating Lumber Properties by Proof Annual Book of ASTM Standards, Vol 04.10.
4
Loading,” Johnson, R.A., Forest Products Journal,Vol 30, No. 1, 1980, pp. 14–22. Annual Book of ASTM Standards, Vol 03.01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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D4761–02a
E6 Terminology Relating to Methods of Mechanical Test- BENDING EDGE-WISE
4
ing
6. Scope
E177 Practice for Use of the Terms Precision and Bias in
5
6.1 This test method provides procedures for the determi-
ASTM Test Methods
2.2 Other Document: nationofthestrengthandmodulusofelasticityofstress-graded
lumber and other wood-base structural material in bending
NIST Voluntary Product Standard PS20 American Soft-
6
edge-wise.
wood Lumber Standard
NOTE 2—The current version of PS 20 is given as an example of a
7. Summary of Test Method
product standard applicable to stress-graded lumber. Other product stan-
7.1 The test specimen is simply supported and loaded by
dards may apply to stress-graded lumber. For wood-base structural
two concentrated f
...