这些标准涵盖了在钢门和钢架中安装普通五金产品的所有重要尺寸属性。所有尺寸应显示在随附图纸上。制定这些标准的目的是仅展示最常用的门用五金制品，并提供标准化目标。如果常用多种配置，则提供单独的图纸。对于其他配置，人们认识到，这些标准可以部分使用，也可以例外使用，同时仍提供一定程度的基本指导和标准化。

These Standards cover all significant dimensional attributes for mounting common hardware products in steel doors and frames. All dimensions shall be shown on the accompanying drawings.These standards were developed to show only the most commonly used preparations for door hardware, and provide targets for standardization. Where multiple configurations are in common usage, separate drawings are provided. For other configurations, it is recognized that these standards may be used in part, or with exceptions, while still providing some degree of basic guidance and standardization.