1月6日下午2点,汪清林业局纤维板厂主楼屋顶的钢筋混凝土拱板突然全部塌落,正在作业的3名工人被砸致残,设备也被破坏。 好端端的屋顶怎么会塌下来呢?据现场检查认为:一是设计结构不合理。原设计屋顶拱板上弦和下弦的混凝土厚度为2.5厘米(其中钢筋占1厘米,混凝土厚度只有1.5厘米 At 6 o’clock on the January 6, Wang Qing forestry fibreboard factory roof of the main building of reinforced concrete suddenly collapse of all the arch, the working three workers were smashed crippled, the equipment has also been destroyed. How the roof will end up falling? According to the site inspection that: First, the design structure is unreasonable. The original design of the roof arch and the bottom chord of the concrete thickness of 2.5 cm (including steel 1 cm, the concrete thickness of only 1.5 cm