ASTM D198

The flexural properties established by this test method provide:

Data for use in development of grading rules and specifications;

Data for use in development of working stresses for structural members;

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

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

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

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

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

Data on relationships between mechanical and physical properties.

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

1. Scope

1.1 These test methods cover the evaluation of lumber in structural size by various testing procedures.

1.2 The test methods appear in the following order:

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 Nomenclature of Domestic Hardwoods and Softwoods
D2395 Test Methods for Specific Gravity of Wood and Wood-Based Materials
D2915 Practice for Evaluating Allowable Properties for Grades of Structural Lumber
D4442 Test Methods for Direct Moisture Content Measurement of Wood and Wood-Base Materials
D9 Terminology Relating to Wood
E4 Practices for Force Verification of Testing Machines
E6 Terminology Relating to Methods of Mechanical Testing
E83 Practice for Verification and Classification of Extensometer System

Index Terms

compression; flexure; modulus of elasticity; modulus of rupture; shear; shear modulus; static test; tension; torsion; wood structural members; Compression testing--wood/wood products; Flexural testing--wood products; Shear testing--wood products; Static tests--building materials/applications; Tensile properties/testing--wood products; Laminates (wood); Lumber; Structural building materials/applications (wood); Wood products (structural) ; ICS Number Code 79.040

Citing ASTM Standards

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