ISO/TR 12470-2:2017 耐火试验 防火密封装置和产品试验结果的应用和扩展指南 第2部分：非承重元素

标准编号：ISO/TR 12470-2:2017

中文名称：耐火试验 防火密封装置和产品试验结果的应用和扩展指南 第2部分：非承重元素

英文名称：Fire-resistance tests — Guidance on the application and extension of results from tests conducted on fire containment assemblies and products — Part 2: Non-loadbearing elements

发布日期：2017-11

标准范围

ISO/TR 12470-2:20 17解释了确定耐火试验结果对实际应用的适用性的方法。ISO/TR 12470-2:20 17适用于那些非承重元件，对于这些元件，有基于ISO 834系列的ISO标准测试程序，用于确定建议用于特定建筑或仅用于一般用途的结构的代表性样品的耐火性。这些要素是:-防火门组件（不包括升降机平台门组）:-木材；-钢；-防火垂直玻璃？金属框架:请注意，玻璃的流变学是这样的，当防火玻璃被加热到高温时，重力对其具有不成比例的影响，因此，不可能为水平玻璃元件的扩展应用提供一般指导。-木材框架；-线性间隙密封；-服务渗透密封。耐火性测试炉具有相当有限的尺寸限制，因此，当安装在最终建筑中时，根据标准方法测试的建筑元件上获得的结果将以类似的方式表现，几乎没有信心。测试结果的直接和扩展应用是两种可能的方法，以确保与测试结构不相同的元件将具有获得与原始测试样本相同防火等级的可接受概率。在这两种情况下，这些应用通常仅指如果建筑元件或其代表性样品根据参考测试中使用的标准防火测试条件在熔炉中进行测试，则建筑元件可以预期达到的防火等级。用于评估管道系统和阻尼器的标准和方法与用于评估传统分离元件的标准和方法有很大不同，因此，这些结构形式不包括在本文件的范围内。计划本文件的后续部分可能包括关于这些要素的指导。

ISO/TR 12470-2:2017 explains a methodology to determine the applicability of the results of fire resistance tests to actual applications.

ISO/TR 12470-2:2017 is applicable to those non-loadbearing elements for which there is an ISO standard test procedure based upon the ISO 834 series for determining the fire resistance of a representative sample of the construction proposed for use in a specific building or just for general use. These elements are:

- fire resisting door assemblies (excluding lift landing doorsets):

• - timber;
• - steel;

- fire resisting vertical glazing?metal framed:

NOTE The rheology of glass is such that gravity has a disproportional influence on fire glass when it is heated to high temperatures and as a consequence, it is not possible to provide generic guidance on the extended application of horizontal glazed elements.

• - timber framed;

- linear gap sealing;

- service penetration sealing.

Fire resistance testing furnaces have fairly restricted size limitations and as a consequence, there is little confidence that the result obtained on an element of construction tested in accordance with the standard methods will behave in a similar manner when installed in the final building.

Direct and extended applications of test results are the two possible ways to ensure that an element that is not identical to the tested construction will have an acceptable probability of obtaining the same fire rating as that of the original tested specimen. In both cases, these applications generally refer only to the fire rating that the building element can expect to reach if it, or a representative sample of it, were to be tested in a furnace according to the standard fire test conditions used in the reference test.

The criteria and methodology used in evaluating ductwork and dampers is significantly different from those used to evaluate conventional separating elements and for this reason, these forms of construction are not included in the scope of this document. It is planned that a subsequent part of this document may include guidance on these elements.

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