1.1 本规范涵盖了为用作外部甲板、楼梯踏板、防护装置和扶手的木塑复合材料和塑料木材制定性能等级的程序。本规范旨在为这些产品或系统在外部应用中的代码识别奠定基础。 注1: 虽然木塑复合材料含有木材或其他纤维素材料，但本规范不要求塑料木材中含有木材或其他纤维素材料。由于木塑复合材料和塑料木材中的非木材材料，其结构、物理、火灾和其他属性可能与木材不同。 注2: 本标准中提及的产品被视为易燃品。除根据试验方法确定的火焰蔓延指数外，本规范中不需要火灾响应特性 E84 . 1.1.1 本规范涵盖的木塑复合材料和塑料木材的塑料部件应主要由热塑性塑料组成。 1.2 本规范涵盖的甲板、楼梯踏板、防护装置和扶手允许具有任何符合规范的形状和厚度（实心或非实心）。 1.3 木塑复合材料和塑料木材以多种纤维和/或树脂配方生产。众所周知，本规范中的性能要求适用于用作甲板、楼梯踏板、防护装置或扶手的任何材料或材料组合。 1.4 制造过程的细节不在本规范的范围内。 1.5 以英寸-磅为单位的数值应视为标准值。 括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.6 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。 1.7 目录: 部分 范围 1. 参考文件 2. 术语 3. 一般要求 4. 采样 4.1 样本量 4.2 条件作用 4.3 弯曲试验 4.4 温度和湿度影响 4.5 抗紫外线试验 4.6 抗冻融试验 4.7 生物退化试验 4.8 防火性能测试 4.9 甲板性能要求 5. 全体的 5.1 弯曲性能试验 5.2 未调整允许荷载的确定 5.3 蠕变恢复试验 5.4 机械紧固件保持试验 5.5 防滑试验 5.6 防护装置和扶手性能要求 6. 全体的 6.1 护栏系统测试要求 6.2 一户和二户住宅要求 6.2.1.1 扶手测试要求（集中负载） 6.3 汇报 7. 独立检查 8. 制造标准 9 精度和偏差 10 关键词 11 双跨试验方法 附件A1 实况报道 附录X1 1.8 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。

1.1 This specification covers procedures to establish a performance rating for wood-plastic composite and plastic lumber for use as exterior deck boards, stair treads, guards, and handrails. The purpose of this specification is to establish a basis for code recognition of these products or systems in exterior applications. Note 1: While wood-plastic composites contain wood or other cellulosic materials, the presence of wood or other cellulosic materials in plastic lumber is not required by this specification. Due to non-wood materials in wood-plastic composites and plastic lumber the structural, physical, fire, and other attributes may not be similar to those of wood. Note 2: The products addressed in this standard are considered combustible. No fire response characteristic is required in this specification except for flame spread index as determined in accordance with Test Method E84 . 1.1.1 The plastic component of wood-plastic composites and plastic lumber covered by this specification shall consist primarily of thermoplastics. 1.2 Deck boards, stair treads, guards, and handrails covered by this specification are permitted to be of any code compliant shape and thickness (solid or non-solid). 1.3 Wood-plastic composites and plastic lumber are produced in a broad range of fiber and/or resin formulations. It is recognized that the performance requirements in this specification are valid for any material or combination of materials used as deck boards, stair treads, guards, or handrails. 1.4 Details of manufacturing processes are beyond the scope of this specification. 1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.6 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. 1.7 Table of Contents: Section Scope 1 Referenced Documents 2 Terminology 3 General Requirements 4 Sampling 4.1 Sample Size 4.2 Conditioning 4.3 Flexural Tests 4.4 Temperature and Moisture Effects 4.5 Ultraviolet (UV) Resistance Test 4.6 Freeze-Thaw Resistance Test 4.7 Biodeterioration Tests 4.8 Fire Performance Tests 4.9 Deck Board Performance Requirements 5 General 5.1 Flexural Performance Tests 5.2 Determination of the Unadjusted Allowable Load 5.3 Creep-Recovery Test 5.4 Mechanical Fastener Holding Tests 5.5 Slip Resistance Test 5.6 Guard and Handrail Performance Requirements 6 General 6.1 Guardrail System Test Requirements 6.2 One- and Two-Family Dwelling Requirements 6.2.1.1 Handrail Test Requirements (Concentrated Load) 6.3 Report 7 Independent Inspection 8 Manufacturing Standard 9 Precision and Bias 10 Keywords 11 Two-Span Test Method Annex A1 Commentary Appendix X1 1.8 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.