1.Hidden danger of water leakage caused by the characteristics of color steel sandwich panel

The thermal conductivity of color steel sandwich panel is large. When the external temperature of steel structure changes greatly, due to the large change of environmental temperature difference, the shrinkage deformation of color steel plate caused by temperature change will produce large displacement at the interface, so the hidden danger of water leakage will easily occur at the interface of the sandwich panel.

In the steel structure building system, due to the structure itself in the temperature change or under the action of wind load, snow load and other external forces, it is easy to produce elastic deformation, which will produce displacement in the connection parts and produce hidden danger of water leakage.For special parts, due to the use of different materials for connection, such as the connection between parapet and steel plate trench, roof lighting belt and other parts, the stress changes are not synchronized, resulting in water leakage.

2.Hidden danger of water leakage caused by structural design of buildings or defects of color steel sandwich panel.In the fierce market competition, in order to undertake the task, the construction party blindly reduces the cost, in order to save raw materials, in the structural design, the slope of the house is reduced, and some of them are lower than 1 / 20, which is easy to generate ponding and cause house leakage.Due to the cost factor, most of the color steel plates used in light steel buildings are of low wave height (large effective area), and the lap width is small. When the house is filled with water, it is easy to overflow the overlapping part of the plate type, resulting in water leakage.