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某科研楼建筑面积为9377米~3,由南、北两楼组成,分别为砖混和框架结构,共5层。其中北楼有楼梯3个和通风竖井2个;顶棚为轻钢龙骨石膏板吊顶;每层有通风管道与通风竖井连通,屋面有风机及通风管道。此时工程正进入全面收尾调试阶段。这天上午,高20米的通风竖井内突然起火,与各楼层相连的通风管道犹如一个大烟囱,刹那间,通风管道外的聚氨酯硬质塑料泡沫板等保温材料被引燃,沿着风管向北楼内各层蔓延,浓烟滚滚,烟气熏人。火灾持续了40分钟后被扑灭。经调查,受灾的主要部位在8～17轴线间,53个房间有不同程度的烧伤,通风竖井中的全部保温材料和抹灰被烧毁,轻钢龙骨吊顶被烧变形需要重做的有4000多米~3,石膏板背面熏黑,装修及墙面污染。二
A scientific research building has a building area of 9377 meters to 3 meters. It consists of two floors in the south and the north. It is a brick-concrete and frame structure with a total of 5 floors. Among them, there are three stairs in the north building and two ventilation shafts; the ceiling is light steel keel gypsum board ceiling; each floor has ventilation ducts connected with the ventilation shaft, and the roof has fans and ventilation ducts. At this point the project is entering a comprehensive closing debugging stage. On the morning of this morning, the ventilation shaft in the 20-meter-high ventilation shaft suddenly caught fire. The ventilation ducts connected to each floor were like a big chimney. In a flash, insulation materials such as polyurethane rigid plastic foam boards outside the ventilation ducts were ignited along the air duct. Spread to the north floor, smoke billows smoke. The fire was extinguished after 40 minutes. After investigation, the main parts of the disaster were between the 8 and 17 axis, 53 rooms had different degrees of burns, all the insulation materials and plaster in the ventilation shaft were burned, and the light steel keel ceiling was burned and deformed. More than 4,000 meters needed to be redone. ~3, gypsum board back smoked, decoration and wall pollution. two