1.1 这些试验方法包括测定应力分级木材和其他木基结构材料的机械性能。 1.2 这些测试方法按以下顺序出现: 部分 沿边缘弯曲 6. 平面弯曲: 中心点荷载 7. 第三点加载 8. 拉伸时的轴向强度 9 压缩轴向强度 10 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 这些试验方法提供了适用于真实现场条件的程序，例如在样品不处于水分平衡的工厂中。 4.2 通过这些试验方法建立的数据可用于以下方面: 4.2.1 为被测试材料（即单个等级、等级组合、物种、物种组或任何其他定义的可识别样本）所代表的群体开发强度和刚度特性。 4.2.2 确认受试材料代表的总体强度和刚度特性的有效性。 4.2.3 研究可能影响材料强度和刚度特性的参数的影响，例如含水量、温度、结尺寸和位置或谷物坡度。 4.3 根据这些试验方法选择的程序应完整记录在报告中，以便于与通过使用传统程序（如试验方法中规定的程序）获得的试验结果相关联 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: Section Bending edge-wise 6 Bending flat-wise: Center-point loading 7 Third-point loading 8 Axial strength in tension 9 Axial strength in compression 10 1.3 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. ====== Significance And Use ====== 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 .