Research on Advanced Technologies for Housing: The Interdependency of the Fire Protection Membrane and the Structural Response of Light-Frame Engineered Wood Floors and Ceilings

在美国，每年有近3500名平民在住宅结构火灾中死亡，17，000人受伤。石膏板防火膜的分离被认为是在标准火灾中预先确定轻型木屋顶/天花板组件的失效。识别与保持石膏板与支撑木结构组件的附着相关的因素将是本研究的重点，并具有改善木组件防火安全的潜力。将量化支撑构件中的挠度和应力对石膏板寿命的影响。范围将限于16 mm（5/8英寸）X型石膏和25 mm（1英寸）S型螺钉的基础连接系统的研究。木构件将包括固体锯木材和层压单板木材（lvl）。16毫米X型石膏板的机械性能的几个措施将建立作为火灾暴露的温度和持续时间的函数。这些基本属性将被用来提出一个模型的耐火石膏板天花板膜连接到工程木材组件。将进行中尺度耐火试验，以评估和验证石膏板的耐火极限模型。

Nearly 3500 civilian deaths and 17,000 injuries occur in residential structure fires each year in the U.S. Detachment of the gypsum board fire protection membrane is believed to predetermine the failure of light-frame wood roof/ceiling assemblies in standardized fires. Identifying the factors associated with maintaining the attachment of the gypsum wallboard to the supporting wood structural assembly will be the focus of this research and holds the potential for improving the fire safety of wood assemblies. The effect of deflections and stresses in the supporting members on the longevity of the gypsum board will be quantified. The scope will be limited to 16-mm (5/8-in) Type X gypsum and the study of a base connection system of 25-mm (1-inch) Type S wallboard screws. Wood members will consist of solid sawn lumber and laminated-veneer-lumber (lvl). Several measures of mechanical performance of 16-mm Type X gypsum board will be established as a function to temperature and duration of fire exposure. These basic properties will be used to propose a model for the fire endurance of gypsum board ceiling membranes attached to engineered wood components. Intermediate-scale fire tests will be conducted to evaluate and verify the fire endurance model of the gypsum board.