【国外标准】 Standard Test Methods for Mechanical Properties of Lumber and Wood-Based Structural Materials

4.1 These test methods provide procedures that are applicable under true field conditions, such as in a plant with specimens not at moisture equilibrium.4.2 The data established by these test methods can be used as follows:4.2.1 Develop strength and stiffness properties for the population represented by the material being tested (that is, individual grades, grade combinations, species, species groups, or any other defined, identifiable sample).4.2.2 Confirm the validity of strength and stiffness properties for the population represented by the material being tested.4.2.3 Investigate the effect of parameters that have the potential to influence the strength and stiffness properties of the material, such as moisture content, temperature, knot size and location, or slope of grain.4.3 The procedures chosen in accordance with these test methods shall be fully documented in the report to facilitate correlation with test results obtained through the use of traditional procedures, such as those set forth in Test Methods D198.1.1 These test methods cover the determination of the mechanical properties of stress-graded lumber and other wood-based structural materials.1.2 These test methods appear in the following order:  SectionBending edge-wise 6Bending flat-wise:   Center-point loading 7 Third-point loading 8Axial strength in tension 9Axial strength in compression 101.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 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.