2、 The concrete roof beam structural steel frame is connected with Connect the method ： The building construction completes the word roof beam form of the well on the roofing according to the designing requirement, has not drained off water in the gutter , adopt the right steel frame shown of picture and connect the method, steel frame and concrete roof beam surface are bloated and firm or welds regularly, and do Easy to keep warm , be antiseptic , deal with waterproofly.

　 Note: The width of roof beam of the well word is not smaller than 200m , highly but seldom smaller than 300mm definitely according to the local rainfall.

　① Pursue to show on right in if bloated firm method.
　② As right picture shows weld the method. I bury the iron plate (60x60 ) and come Lack each mao for one As right picture shows weld the method. I bury the iron plate (60x60 ) and come Lack each mao for one.