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    ASTM D198 - 21a

    Standard Test Methods of Static Tests of Lumber in Structural Sizes

    Active Standard ASTM D198 | Developed by Subcommittee: D07.01

    Book of Standards Volume: 04.10

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    Significance and Use

    6.1 The flexural properties established by this test method provide:

    6.1.1 Data for use in development of grading rules and specifications;

    6.1.2 Data for use in development of design values for structural members;

    6.1.3 Data on the influence of imperfections on mechanical properties of structural members;

    6.1.4 Data on strength properties of different species or grades in various structural sizes;

    6.1.5 Data for use in checking existing equations or hypotheses relating to the structural behavior;

    6.1.6 Data on the effects of chemical or environmental conditions on mechanical properties;

    6.1.7 Data on effects of fabrication variables such as depth, taper, notches, or type of end joint in laminations; and

    6.1.8 Data on relationships between mechanical and physical properties.

    6.2 Procedures are described here in sufficient detail to permit duplication in different laboratories so that comparisons of results from different sources will be valid. Where special circumstances require deviation from some details of these procedures, these deviations shall be carefully described in the report (see Section 11).

    1. Scope

    1.1 These test methods cover the evaluation of lumber and wood-based products in structural sizes by various testing procedures.

    1.2 The test methods appear in the following order:




      4 – 11

    Compression (Short Specimen)

    13 – 20

    Compression (Long Specimen)

    21 – 28


    29 – 36


    37 – 44

    Shear Modulus

    45 – 52

    1.3 Notations and symbols relating to the various testing procedures are given in Appendix X1.

    1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

    1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

    1.6 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.

    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

    D9 Terminology Relating to Wood and Wood-Based Products

    D1165 Nomenclature of Commercial Hardwoods and Softwoods

    D2395 Test Methods for Density and Specific Gravity (Relative Density) of Wood and Wood-Based Materials

    D2915 Practice for Sampling and Data-Analysis for Structural Wood and Wood-Based Products

    D3737 Practice for Establishing Allowable Properties for Structural Glued Laminated Timber (Glulam)

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

    D4761 Test Methods for Mechanical Properties of Lumber and Wood-Based Structural Materials

    D7438 Practice for Field Calibration and Application of Hand-Held Moisture Meters

    E4 Practices for Force Calibration and Verification of Testing Machines

    E6 Terminology Relating to Methods of Mechanical Testing

    E83 Practice for Verification and Classification of Extensometer Systems

    E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods

    E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

    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 30103600(Structural products)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/D0198-21A

    Citation Format

    ASTM D198-21a, Standard Test Methods of Static Tests of Lumber in Structural Sizes, ASTM International, West Conshohocken, PA, 2021, www.astm.org

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