1.1 本规范涵盖了由承受压缩载荷的无侧限聚醚氨基甲酸酯旋转元件以及通过轴承传递剪切和/或拉伸载荷的阻力机构组成的桥梁轴承。对于膨胀和/或收缩应用，一个额外的不锈钢平面抵靠着一块面对聚四氟乙烯片（PTFE）的碳钢板滑动。轴承的功能是传递载荷并适应任何相对运动，包括桥梁上部结构与其支撑结构之间的旋转，或两者兼而有之。 1.2 本规范中规定的要求是制造高质量轴承装置所必需的最低要求。由于其他设计或施工条件，可能有必要增加这些最小值。 1.3 以英寸磅为单位的数值应视为标准。 括号中给出的值仅供参考。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

1.1 This specification covers bridge bearings that consist of an unconfined polyether urethane rotational element subjected to compression loads, along with a resisting mechanism to transmit shear and/or tension loads through the bearing. For expansion and/or contraction applications, an additional stainless steel flat surface slides against a carbon steel plate faced with sheet polytetrafluoroethylene (PTFE). The function of the bearing is to transfer loads and to accommodate any relative movement, including rotation between a bridge superstructure and its supporting structure, or both. 1.2 The requirements stated in this specification are the minimums necessary for the manufacture of quality bearing devices. It may be necessary to increase these minimum values due to other design or construction conditions. 1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only. 1.4 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. 1.5 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.