标准摘要
[中文适用范围]： ISO 12468 的这一部分规定了确定屋顶对外部火灾的抵抗力的测试方法。 该方法评估屋顶暴露于三种类型的燃烧品牌并结合风和有或没有热辐射时的行为，涉及a）火灾在屋顶外表面的蔓延，b）火灾在屋顶内的蔓延，c ) 火势渗透，以及 d) 产生燃烧的液滴或碎片从屋顶、屋顶下或暴露表面落下。 [外文原描述]： ISO 12468-1:2013 specifies a test method to determine the resistance of roofs to external exposure to fire. This method evaluates the behaviour of the roof when exposed to three types of burning brands combined with wind and with or without heat radiation, concerning the fire spread across the external surface of the roof, the fire spread within the roof, the fire penetration, and the production of flaming droplets or debris falling through the roof, from the underside of the roof, or from the exposed surface.
英文名称External exposure of roofs to fire — Part 1: Test method