1.1 本规范涵盖了模制玻璃纤维增强石膏（GRG）零件的安装。 1.2 以英寸-磅单位或国际单位制（公制）表示的数值应单独视为标准。在本文中，国际单位制显示在括号中。每个中规定的值应独立于其他值使用。两个系统的值不得合并。 1.3 所有提及的饰面、尺寸和公差均应指零件的完工表面。 1.4 本标准的文本引用了提供解释材料的注释和脚注。这些注释和脚注（不包括表和图中的注释和脚注）不应视为本标准的要求。 1.5 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。

1.1 This specification covers the installation of molded glass fiber reinforced gypsum (GRG) parts. 1.2 The values stated in either inch-pound units or SI (metric) are to be regarded separately as the standard. Within the text, SI units are shown in brackets. The values stated in each shall be used independent of the other. Values from the two systems shall not be combined. 1.3 All references to finishes, dimensions and tolerances shall refer to the finished surface of the part. 1.4 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard. 1.5 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.