1.1 这些标准性能要求为A类（住宅）和B类（非住宅）户外使用的成人和儿童塑料座椅制定了国家认可的性能要求。 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 这些标准性能要求不适用于躺椅、多位置椅、软垫椅或其他类型的家具。 1.4 这些标准性能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性能。 1.5 由回收塑料制造的产品: 1.5.1 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、健康和环境实践，并确定监管限制的适用性。 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。 ====意义和用途====== 4.1 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。 4.2 测试模拟两种类型的表面: 4.2.1 光滑表面，如油毡、湿水池台面等。玻璃测试底座（见 图2 )用于模拟此曲面。 图2 玻璃测试基地 注1: （A） 聚甲基丙烯酸甲酯板材，0.25±0.03-in。（6±0.1-mm）厚度；（B） AC外部胶粘杉木胶合板，0.75±0.08英寸。（19±0.2 mm）或更大厚度；（C） 聚丙烯微泡沫板；0.7±0.01-lb/ft 3. （11±0.2-kg/m 3. )密度和0.13±0.01英寸。（3±0.03-mm）厚度；和（D）玻璃/钢化板，0.38±0.04英寸。（10±0.1-mm）厚度。 注2: （A） ，（B）、（C）和（D）的尺寸应大致相同，48英寸。 （1219 mm）或更大。 4.2.2 粗糙表面，如木质甲板、室外自然表面等。胶合板测试基地（见 图3 )用于模拟此曲面。 图3 胶合板测试基地 注1: （A） 聚甲基丙烯酸甲酯板材，0.25±0.03-in。（6±0.1-mm）厚度；和（B）0.75±0.08英寸的AC外部胶粘杉木胶合板。（19±0.2 mm）或更大厚度。 注2: （A） 和（B）的尺寸应大致相同，48英寸。（1219 mm）或更大。

1.1 These standard performance requirements establish nationally recognized performance requirements for Class A (residential) and Class B (nonresidential) adult and children’s 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 standard performance requirements are not applicable to chaises, multi-positional chairs, upholstered chairs, or other types of furniture. 1.4 These standard performance requirements cover the performance of product regarding aspects of outdoor weathering, impact, static load, and rear leg testing. 1.5 Products Manufactured from Recycled Plastics: 1.5.1 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 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. ====== Significance And Use ====== 4.1 Tests and criteria as outlined determine the overall usability and stability of chairs in an environment simulating the conditions of use. 4.2 Tests simulate two types of surfaces: 4.2.1 Smooth surfaces such as linoleum, wet pool decks, etc. The glass testing base (see Fig. 2 ) is used to simulate this surface. FIG. 2 Glass Testing Base Note 1: (A) Poly(methyl methacrylate) sheet, 0.25 ± 0.03-in. (6 ± 0.1-mm) thickness; (B) AC exterior glue fir plywood sheet, 0.75 ± 0.08 in. (19 ± 0.2 mm) or greater in thickness; (C) polypropylene microfoam sheet; 0.7 ± 0.01-lb/ft 3 (11 ± 0.2-kg/m 3 ) density and 0.13 ± 0.01-in. (3 ± 0.03-mm) thickness; and (D) glass/tempered sheet, 0.38 ± 0.04-in. (10 ± 0.1-mm) thickness. Note 2: (A), (B), (C), and (D) shall be roughly the same dimensions, 48 in. (1219 mm) or greater. 4.2.2 Rough surfaces such as wooden decks, outdoor natural surfaces, etc. The plywood testing base (see Fig. 3 ) is used to simulate this surface. FIG. 3 Plywood Testing Base Note 1: (A) Poly(methyl methacrylate) sheet, 0.25 ± 0.03-in. (6 ± 0.1-mm) thickness; and (B) AC exterior glue fir plywood sheet, 0.75 ± 0.08 in. (19 ± 0.2 mm) or greater in thickness. Note 2: (A) and (B) shall be roughly the same dimensions, 48 in. (1219 mm) or greater.