本文件规定了工业货车叉臂加长件和伸缩叉臂的技术特性和强度要求。它适用于ISO5053？2，设计用于工业卡车和堆垛升降机卡车，如ISO5053？1，具有符合ISO2330 本文件不适用于整体式横向伸缩叉装置或剪式伸缩装置。

This document specifies technical characteristics and strength requirements for fork arm extensions and telescopic fork arms for industrial trucks. It applies to fork arm extensions and telescopic fork arms, as defined in ISO？5053？2, designed for use on industrial trucks and stacking lift trucks, as defined in ISO？5053？1, having fork arm carriers and, in the case of fork arm extensions, fork arms conforming to ISO？2330. This document does not apply to integral transverse telescopic fork devices or scissor-action reach devices.