ASTM D143-09
Standard Test Methods for Small Clear Specimens of Timber

Standard No.
ASTM D143-09
Release Date
2009
Published By
American Society for Testing and Materials (ASTM)
Status
Replace By
ASTM D143-14
Latest
ASTM D143-23
Scope

These test methods cover tests on small clear specimens of wood that are made to provide the following:

Data for comparing the mechanical properties of various species,

Data for the establishment of correct strength functions, which in conjunction with results of tests of timbers in structural sizes (see Test Methods D198 and Test Methods D4761), afford a basis for establishing allowable stresses, and

Data to determine the influence on the mechanical properties of such factors as density, locality of growth, position in cross section, height of timber in the tree, change of properties with seasoning or treatment with chemicals, and change from sapwood to heartwood.

1.1 These test methods cover the determination of various strength and related properties of wood by testing small clear specimens.

1.1.1 These test methods represent procedures for evaluating the different mechanical and physical properties, controlling factors such as specimen size, moisture content, temperature, and rate of loading.

1.1.2 Sampling and collection of material is discussed in Practice D5536. Sample data, computation sheets, and cards have been incorporated, which were of assistance to the investigator in systematizing records.

1.1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. When a weight is prescribed, the basic inch-pound unit of weight (lbf) and the basic SI unit of mass (Kg) are cited.

1.2 The procedures for the various tests appear in the following order:

Sections
Photographs of Specimens 5
Control of Moisture Content and Temperature 6
Record of Heartwood and Sapwood 7
Static Bending 8
Compression Parallel to Grain 9
Impact Bending10
Toughness11
Compression Perpendicular to Grain12
Hardness13
Shear Parallel to Grain14
Cleavage15
Tension Parallel to Grain16
Tension Perpendicular to Grain17
Nail Withdrawal18
Specific Gravity and Shrinkage in Volume19
Radial and Tangential Shrinkage20
Moisture Determination

ASTM D143-09 Referenced Document

  • ASTM D198 Standard Test Methods of Static Tests of Lumber in Structural Sizes
  • ASTM D2395 Standard Test Methods for Specific Gravity of Wood and Wood-Based Materials
  • ASTM D3043 Standard Methods of Testing Structural Panels in Flexure
  • ASTM D3500 Standard Test Methods for Structural Panels in Tension
  • ASTM D4442 Standard Test Methods for Direct Moisture Content Measurement of Wood and Wood-Base Materials
  • ASTM D4761 Standard Test Methods for Mechanical Properties of Lumber and Wood-Based Structural Materials
  • ASTM D5536 Standard Practice for Sampling Forest Trees for Determination of Clear Wood Properties
  • ASTM E4 Standard Practices for Force Verification of Testing Machines

ASTM D143-09 history

  • 2023 ASTM D143-23 Standard Test Methods for Small Clear Specimens of Timber
  • 2022 ASTM D143-22 Standard Test Methods for Small Clear Specimens of Timber
  • 2021 ASTM D143-21 Standard Test Methods for Small Clear Specimens of Timber
  • 2014 ASTM D143-14 Standard Test Methods for Small Clear Specimens of Timber
  • 2009 ASTM D143-09 Standard Test Methods for Small Clear Specimens of Timber
  • 1994 ASTM D143-94(2007) Standard Test Methods for Small Clear Specimens of Timber
  • 1994 ASTM D143-94(2000)e1 Standard Test Methods for Small Clear Specimens of Timber
  • 2000 ASTM D143-94 Standard Test Methods for Small Clear Specimens of Timber
Standard Test Methods for Small Clear Specimens of Timber


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