ASTM D198-14 1.2.2014 | technical standard

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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 of beams;

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 materials in structural sizes by various testing procedures.

1.2 The test methods appear in the following order:

Sections

Flexure

Compression (Short Column)

Compression (Long Member)

Tension

Torsion

Shear Modulus

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

2. Referenced Documents

D1165-23	Standard Nomenclature of Commercial Hardwoods and Softwoods
D2395-17(2022)	Standard Test Methods for Density and Specific Gravity (Relative Density) of Wood and Wood-Based Materials
D9-20	Standard Terminology Relating to Wood and Wood-Based Products
E6-23a	Standard Terminology Relating to Methods of Mechanical Testing (Includes all amendments and changes 3/29/2023).
E83-23	Standard Practice for Verification and Classification of Extensometer Systems
E177-20	Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E691-23	Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E2309-05	Standard Practices for Verification of Displacement Measuring Systems and Devices Used in Material Testing Machines
D2915-17(2022)	Standard Practice for Sampling and Data-Analysis for Structural Wood and Wood-Based Products
D3737-18(2023)e1	Standard Practice for Establishing Allowable Properties for Structural Glued Laminated Timber (Glulam) (Includes all amendments and changes 11/9/2023).
D4442-20	Standard Test Methods for Direct Moisture Content Measurement of Wood and Wood-Based Materials
D4761-19	Standard Test Methods for Mechanical Properties of Lumber and Wood-Based Structural Materials
D7438-20	Standard Practice for Field Calibration and Application of Hand-Held Moisture Meters
E4-21	Standard Practices for Force Calibration and Verification of Testing Machines

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ASTM D198-14

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