1.1本规范规定了用于农业、商业、住宅围栏和栏杆的硬质聚氯乙烯（PVC）外部型材的材料性能和物理性能要求，包括尺寸公差、挤出质量和耐候性。还提供了符合本规范的外部型材挤压件的测试和识别方法。 笔记 1-应从制造商处获得有关应用、组装和安装的信息和/或根据实施规程F 1999 . 笔记 2-本规范未涉及围栏和栏杆组件的承重特性（例如，风荷载、水平或垂直护栏荷载）。 1.2这些外部型材中使用的材料仅限于单一均匀挤出或两个或多个PVC化合物在不同层中共挤的刚性聚氯乙烯（PVC）化合物。 1.3以英寸-磅为单位的数值应视为标准值。括号中的值仅供参考。 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）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 ====意义和用途====== 本规范旨在为用于装配农业、商业和住宅围栏和栏杆的硬质聚氯乙烯（PVC）外部型材制定公认的质量标准。术语 “ PVC栅栏 ” 指完整的围栏和栏杆系统，其中主要结构构件（如立柱、栏杆、主轴、桩和大门）由PVC外部型材制成。 附件组件（不包括在本规范中），包括螺栓、螺钉、铰链、插销、盖和支架，可由PVC和/或非PVC材料制成。本规范中包含的信息旨在帮助生产商、分销商和用户，并促进买方和卖方之间的理解。

1.1 This specification establishes requirements for the material properties and physical properties, including dimensional tolerances, extrusion quality, and weatherability, of rigid poly vinyl-chloride (PVC) exterior profiles used for agricultural, commercial, residential fencing and railing. Methods for testing and for identifying exterior profile extrusions that comply with this specification are also provided. Note 1—Information with regard to application, assembly, and installation should be obtained from the manufacturer and/or in accordance with Practice F 1999 . Note 2—Loadbearing characteristics for fence and railing assemblies are not addressed within this specification (for example, windload, horizontal or vertical guardrail loading). 1.2 The material used in these exterior profiles is limited to rigid poly (vinyl chloride) (PVC) compounds in a single homogeneous extrusion or in a coextrusion of two or more PVC compounds in distinct layers. 1.3 The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are provided 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== The purpose of this specification is to establish a recognized standard of quality for rigid poly vinyl chloride (PVC) exterior profiles for use in assembling agricultural, commercial, and residential fencing and railing. The term “ PVC fence ” refers to complete fencing and railings systems in which the primary structural members such as posts, rails, spindles, pickets, and gates are made from PVC exterior profiles. Accessory components (not included in this specification), including bolts, screws, hinges, latches, caps, and brackets, may be made from PVC and/or non-PVC materials. The information contained in this specification is intended to be helpful to producers, distributors, and users and to promote understanding between purchasers and sellers.