The performance of tile roofing assemblies as well as untreated cedar shake roofing assemblies exposed to continuous firebrand showers were compared. Specifically, experiments were conducted for two types of concrete tile roofing assemblies (flat and profiled), one type of terracotta tile roofing assembly (flat), and an untreated (without any fire retardant) cedar shake roofing assembly. The design of the roofing assemblies were based on construction guidelines in the USA. The duration of the firebrand flux was fixed at 20 minutes, and the wind speed was varied from 6 m/s to 9 m/s. These wind speeds were chosen to be able to compare roofing assembly performance to similar assemblies exposed to a batch-feed firebrand generator which had limited duration of firebrand exposure (6 min). The average firebrand mass flux that arrived at the surface of the roofing assemblies was 0.3 g/m2s Results indicated that for the untreated cedar shake assemblies, ignition occurred easily from the firebrand assault, and this type of roofing assembly generated their own firebrands after ignition. To attempt to quantify the degree of penetration, the number of firebrands that penetrated the tile roofing assemblies, and deposited onto the underlayment/counter-batten system was counted as function of wind speed for each assembly. Firebrand penetration was observed, even for the flat tile assemblies. It is believed that these are the first-ever experiments described in the peer-reviewed literature to expose wood and tile roofing experiments to continuous wind-driven firebrand showers.

中文翻译：

---

木材和瓦片屋顶组件暴露于连续火种攻击的性能

比较了瓦屋顶组件和未经处理的雪松摇动屋顶组件暴露于连续火焰淋浴的性能。具体而言，对两种类型的混凝土瓦屋面组件（平面和异形）、一种类型的赤陶瓦屋面组件（平面）和未经处理（不含任何阻燃剂）的雪松屋面组件进行了实验。屋面组件的设计基于美国的施工指南。火焰通量的持续时间固定为 20 分钟，风速从 6 m/s 变化到 9 m/s。选择这些风速是为了能够将屋顶组件的性能与暴露于具有有限火迹暴露持续时间（6 分钟）的批量进给火火发生器的类似组件进行比较。到达屋面组件表面的平均火点质量通量为 0.3 g/m2s 结果表明，对于未经处理的雪松摇动组件，火点攻击很容易发生点燃，而这种类型的屋顶组件在点燃后会产生自己的火点。为了尝试量化穿透程度，将穿透瓦屋顶组件并沉积在衬垫/反板条系统上的火种数量计算为每个组件的风速函数。观察到火痕渗透，甚至对于平瓦组件也是如此。据信，这是同行评议文献中描述的首次将木材和瓦片屋顶实验暴露于连续风力驱动的火焰阵雨的实验。3 g/m2s 结果表明，对于未经处理的雪松振动组件，火点攻击很容易发生点燃，而这种类型的屋面组件在点燃后会产生自己的火点。为了尝试量化穿透程度，将穿透瓦屋顶组件并沉积在衬垫/反板条系统上的火种数量计算为每个组件的风速函数。观察到火痕渗透，甚至对于平瓦组件也是如此。据信，这是同行评议文献中描述的首次将木材和瓦片屋顶实验暴露于连续风力驱动的火焰阵雨的实验。3 g/m2s 结果表明，对于未经处理的雪松振动组件，火点攻击很容易发生点燃，而这种类型的屋面组件在点燃后会产生自己的火点。为了尝试量化穿透程度，将穿透瓦屋顶组件并沉积在衬垫/反板条系统上的火种数量计算为每个组件的风速函数。观察到火痕渗透，甚至对于平瓦组件也是如此。据信，这是同行评议文献中描述的首次将木材和瓦片屋顶实验暴露于连续风力驱动的火焰阵雨的实验。这种类型的屋顶组件在点燃后会产生自己的火种。为了尝试量化穿透程度，将穿透瓦屋顶组件并沉积在衬垫/反板条系统上的火种数量计算为每个组件的风速函数。观察到火痕渗透，甚至对于平瓦组件也是如此。据信，这是同行评议文献中描述的首次将木材和瓦片屋顶实验暴露于连续风力驱动的火焰阵雨的实验。这种类型的屋顶组件在点燃后会产生自己的火种。为了尝试量化穿透程度，将穿透瓦屋顶组件并沉积在衬垫/反板条系统上的火种数量计算为每个组件的风速函数。观察到火痕渗透，甚至对于平瓦组件也是如此。据信，这是同行评议文献中描述的首次将木材和瓦片屋顶实验暴露于连续风力驱动的火焰阵雨的实验。即使是平瓦组件。据信，这是同行评议文献中描述的首次将木材和瓦片屋顶实验暴露于连续风力驱动的火焰阵雨的实验。即使是平瓦组件。据信，这是同行评议文献中描述的首次将木材和瓦片屋顶实验暴露于连续风力驱动的火焰阵雨的实验。