1.1这些要求确立了国家认可的用于室外使用的A类（住宅）和B类（非住宅）塑料座椅的性能要求。 1.2这些要求不涉及影响制造现场以外椅子性能的条件。 1.3这些要求不适用于躺椅、多位椅、软垫椅或其他类型的家具。 1.4这些要求涵盖了产品在室外风化、冲击、静载荷和后腿测试方面的物理性能。 1.5只要满足性能要求，产品可以由回收塑料制造。 1.6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。 1.7 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====== 概述的测试和标准确定了座椅在模拟使用条件的环境中的整体可用性和稳定性。 测试模拟两种类型的表面: 光滑表面，如油毡、湿水池甲板等。玻璃测试基座（图2）用于模拟该表面。 粗糙表面，如木质甲板、室外植草区域等。胶合板测试基地（图3）用于模拟该表面。 笔记 -A=聚甲基丙烯酸甲酯板材（见标准规范）；B=AC外部胶合杉木胶合板（见标准规范）； C=聚丙烯微泡沫板（见标准规范）；D=玻璃/钢化（见标准规范）。 图2玻璃测试基地 笔记 -A=聚甲基丙烯酸甲酯板材（见标准规范）；B=AC外部胶合杉木胶合板（见标准规范）。 图3胶合板试验基地

1.1 These requirements establish nationally recognized performance requirements for Class A (residential) and Class B (nonresidential) plastic chairs intended for outdoor use. 1.2 These requirements do not address conditions that affect the performance of the chair beyond the manufacturing site. 1.3 These requirements are not applicable to chaises, multipositional chairs, upholstered chairs, or other types of furniture. 1.4 These requirements cover the physical performance of product regarding the aspects of outdoor weathering, impact, static load, and rear leg testing. 1.5 Products may be manufactured from recycled plastics as long as the performance requirements are met. 1.6 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. 1.7 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 ====== Tests and criteria as outlined determine the overall usability and stability of chairs in an environment simulating the conditions of use. Tests simulate two types of surfaces: Smooth surfaces such as linoleum, wet pool decks, etc. The glass testing base (Fig. 2) is used to simulate this surface. Rough surfaces such as wooden decks, outdoor grassed areas, etc. The plywood testing base (Fig. 3) is used to simulate this surface. Note —A = poly(methyl methacrylate) sheet (see standard specifications); B = AC exterior glue fir plywood (see standard specifications); C = polypropylene microfoam sheet (see standard specifications); D = glass/tempered (see standard specifications). FIG. 2 Glass Testing Base Note —A = poly(methyl methacrylate) sheet (see standard specifications); B = AC exterior glue fir plywood (see standard specifications). FIG. 3 Plywood Testing Base