1.1 本规程用于评估端接木钉的高温性能。 1.2 含有端接木钉的对称墙体组件暴露于试验方法中规定的标准火灾暴露下 E119 . 1.3 如果墙体组件能够抵抗试验方法中规定的标准火灾暴露，则认为端接木钉合格 E119 持续60分钟或更长时间。端接木钉的鉴定仅限于接头配置和测试的粘合剂。 1.4 本规程用于评估端接木钉在受控条件下的加热和燃烧性能，但其本身并不包括实际火灾条件下火灾危险或火灾风险评估所需的所有因素。 1.5 以英寸-磅为单位的数值应视为标准值。括号中给出的值仅供参考。 1.6 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.7 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。 ====意义和用途====== 5.1 当墙体组件暴露于试验方法中规定的标准火灾中时，耐火等级组件中使用的端接木钉应能够在高温暴露下的规定时间内支撑叠加的设计荷载 E119 . 轻质木组件利用石膏墙板或其他类型的膜保护，以达到组件所需的耐火等级。然而，木螺柱和螺柱中的端部接头应在额定值期间抵抗高温环境。本实施规程提供了一种评估由端接螺柱制成的组件的高温性能的方法，端接螺柱的防火性能与由实心锯木螺柱制成的组件相当。

1.1 This practice is to be used to evaluate the elevated temperature performance of end-jointed lumber studs. 1.2 A symmetric wall assembly containing end-jointed lumber studs is exposed to a standard fire exposure specified in Test Methods E119 . 1.3 End-jointed lumber studs are deemed qualified if the wall assembly resists a standard fire exposure specified in Test Methods E119 for a period of 60 min or more. Qualification of end-jointed lumber studs are restricted to the joint configuration and adhesive tested. 1.4 This practice is used to evaluate the performance of end-jointed lumber studs to heat and flame under controlled conditions, but does not by itself incorporate all factors required for fire hazard or fire risk assessment under actual fire conditions. 1.5 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 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. ====== Significance And Use ====== 5.1 End-jointed lumber studs used in fire resistance-rated assemblies shall be able to support the superimposed design load for the specified time under an elevated temperature exposure, when a wall assembly is exposed to a standard fire specified in Test Methods E119 . Light-weight wood assemblies utilize gypsum wallboard or other types of membrane protection to accomplish a requisite fire resistance rating for the assembly. However, wood studs and the end joints in the studs shall resist the developed elevated temperature environment for the duration of the rating. This practice provides a method for evaluating the elevated temperature performance of an assembly constructed with end-jointed studs having fire performance comparable to an assembly constructed with solid-sawn studs.