天然纤维增强塑料复合材料（NFC）层板跨度额定值的测定

[中文适用范围]： 本文件规定了为天然纤维增强塑料复合材料（NFC）甲板和用作楼梯踏板的甲板建立跨度等级的程序，前提是楼梯踏板由与甲板板相同的材料和加工技术生产。 本文件涵盖了性能测试方法、验收标准和量程等级的确定。 它的目的是为允许易燃结构的外部应用中使用的甲板板的代码识别奠定基础。 [外文原描述]： ISO 19821:2017 specifies the procedures to establish a span rating for natural fibre-reinforced plastic composite (NFC) deck boards and deck boards used as stair treads, provided that the stair treads are produced from the same materials and processing techniques as the deck boards. This document covers test methods of performance, acceptance criteria and determination of span rating. It is intended to establish the basis for code recognition of deck boards used in exterior applications where combustible construction is allowed.