1.1 本规程包含从透明木材强度特性开始确定圆木桩容许应力的程序。 1.2 根据本规程确定的应力适用于符合规范质量、平直度、螺旋纹、打结、检查、震动和劈裂规定的桩 D25 . 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 本规程旨在供协会、技术协会和其他团体使用，这些团体制定了国家设计标准，并使用了圆木桩的建议。 4.2 在使用根据本规程确定的容许应力时，应考虑可能影响桩系统性能的每个终端使用的特定因素。这些因素包括临界截面的位置、土壤的承载力、桩承受驱动力的能力和使用条件。

1.1 This practice contains procedures for establishing allowable stresses for round timber piles starting with clear wood strength properties. 1.2 Stresses established under this practice are applicable to piles conforming to the quality, straightness, spiral grain, knot, check, shake, and split provisions of Specification D25 . 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 This practice is intended for use by associations, technical societies and other groups that develop national design standards and use recommendations for round timber piles. 4.2 In using allowable stresses established under this practice, factors specific to each end use which may affect the performance of the pile system shall be considered. Such factors include the location of the critical section, the bearing capacity of the soil, the ability of the pile to withstand driving forces and conditions of service.