As the top load-bearing and outer envelope structure of the building, the building roof is very important to the entire building in terms of its enclosing and facade modeling effects. It is also a part of the steel structure enclosing system that is prone to water leakage. The main function of the roof is to resist the erosion of wind, rain, and snow, the light radiation of the sun, heat radiation, bear the weight of the roof, the wind and snow on the roof, and the load of the master. In order to ensure the normal use of the steel structure factory roof, its connection quality must be guaranteed.
Steel structure factory house panels have two types of long-directional connections and lateral connections on the roof. The long-direction connection is mainly lapped joint, that is, the upward slope board presses down the sloping board, and the lap joint is equipped with special waterproof sealant and special fixing strips. At present, there are mainly three ways of lateral connection:
1. Overlap connection
The overlapping edges of the profiled steel plates are overlapped and connected into a whole with various bolts, rivets, or self-tapping screws. It is divided into two types, with and without a sealant groove. The roof screws are exposed and the wave crest is relatively low.
2. Concealed connection
The fixed support is fixed on the roof purlin with flat head tapping screws, and then the profiled roof panel is buckled with the fixed support. No screws are exposed on the roof, and the deformation of thermal expansion and contraction cannot be controlled due to the direct screw connection with the purlin.
3. Bite concealed button connection
The more advanced roof panel connection method, the roof system uses sliding brackets to fix the roof panel, which not only helps the roof waterproof and maintains the integrity of the roof, but also effectively controls the deformation caused by thermal expansion and contraction.