建筑构件即建筑结构的组成单元。耐火试验中的基本构件有梁、柱、楼板、墙壁等。 建筑构件的耐火试验,是以试验结果评定构件耐火极限的试验方法。建筑构件的耐火极限,则是指构件在标准耐火试验中,从受到火的作用时起,到失去耐火稳定性或耐火完整性而被破坏或失去绝热性时止,这段抵抗火的作用的时间,以小时表示。在上述三个特性中,只要失去或被破坏其中一个,就可认为该构件到了耐火极限。所谓耐火稳定性,是指构件在行承载或无承载的情况下受到火的作用时具有不倾覆的性能。所谓耐 Building components that the building structure of the unit. The basic components of the fire test beams, columns, floors, walls and so on. Fire resistance test of building components, test results to assess the fire resistance of components of the test method. The fire resistance of building components, refers to the components in the standard fire test, from the role of the fire from the time to the loss of fire resistance stability or integrity of the fire was destroyed or lost when the heat insulation, the role of resistance to fire Time, in hours. In the three characteristics above, as long as one of them is lost or damaged, it is considered that the component has reached the fire resistance limit. The so-called fire-resistant stability, refers to the components in the line with or without bearing the role of fire with a non-overturning performance. The so-called resistance