ASTM D143 - 14

    Standard Test Methods for Small Clear Specimens of Timber

    Active Standard ASTM D143 | Developed by Subcommittee: D07.01

    Book of Standards Volume: 04.10


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    Significance and Use

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

    4.1.1 Data for comparing the mechanical properties of various species,

    4.1.2 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

    4.1.3 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. Scope

    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 Bending

    10

    Toughness

    11

    Compression Perpendicular to Grain

    12

    Hardness

    13

    Shear Parallel to Grain

    14

    Cleavage

    15

    Tension Parallel to Grain

    16

    Tension Perpendicular to Grain

    17

    Nail Withdrawal

    18

    Specific Gravity and Shrinkage in Volume

    19

    Radial and Tangential Shrinkage

    20

    Moisture Determination

    21

    Permissible Variations

    22

    Calibration

    23


    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.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D198 Test Methods of Static Tests of Lumber in Structural Sizes

    D2395 Test Methods for Specific Gravity of Wood and Wood-Based Materials

    D3043 Test Methods for Structural Panels in Flexure

    D3500 Test Methods for Structural Panels in Tension

    D4442 Test Methods for Direct Moisture Content Measurement of Wood and Wood-Base Materials

    D4761 Test Methods for Mechanical Properties of Lumber and Wood-Base Structural Material

    D5536 Practice for Sampling Forest Trees for Determination of Clear Wood Properties

    E4 Practices for Force Verification of Testing Machines

    E2309 Practices for Verification of Displacement Measuring Systems and Devices Used in Material Testing Machines


    ICS Code

    ICS Number Code 79.040 (Wood, sawlogs and sawn timber)

    UNSPSC Code

    UNSPSC Code 11121600(Wood)


    Referencing This Standard

    DOI: 10.1520/D0143

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM D143-14, Standard Test Methods for Small Clear Specimens of Timber, ASTM International, West Conshohocken, PA, 2014, www.astm.org

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