本出版物旨在为标准钢门和钢架的用户提供有关制造公差的明确信息。它还旨在向安装承包商提供公差，以确保整个开口的正确操作。本文件适用于厂内检查。在没有材料损坏或安装不当证据的情况下，可将其用于现场检查。

It is the intent of this publication to provide users of standard steel doors and frames with definitive information regarding manufacturing tolerances. It is also intended to provide installation contractor(s) of the tolerances to be considered to assure proper operation of the complete opening. This document is intended for in-plant inspections. It may be used for on-site inspections where there is no evidence of damage to material or improper installation.