Significance and Use

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 (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 Specific Gravity 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-Base Materials

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

E4 Practices for Force 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

Keywords

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; Laminates (wood); Lumber; Shear testing--wood products; Static tests--building materials/applications; Structural building materials/applications (wood); Tensile properties/testing--wood products; Wood products (structural) ;

ICS Code

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

DOI: 10.1520/D0198-09

ASTM International is a member of CrossRef.

ASTM D198