How many ways are there to deal with the lap jointing of steel structure factory building panels?
Lap structure of building panels in steel structure factory: Color steel plate is dense and impermeable, but because the colored steel plate profiled plate is a prefabricated enclosure structure, the joints between the plates become the direct source of leaking rainwater. The profiled roof of 10,000 square meters generally has a 15-meter-long seam, so the reasonable structure of the seam or otherwise becomes a crucial factor in choosing the profiled roof of the steel structure factory building.
The configuration of the board seam is directly reflected in the shape of the two long sides of each board. At present, there are four types of seam construction methods for the edge of the profiled plate, namely: natural lap joint method, waterproof cavity method, buckle cover method, and bite seam crimping method.
1. Natural snap type
The natural buckle type is a continuation of the form of cement asbestos corrugated tiles and galvanized iron tiles, but the old-fashioned buckle method requires at least one flat wave distance to be overlapped. And the use of color steel plate, the wave is generally larger. When used as a roof, if another half-wave is lapped, the economic index will be improved, so many methods use the method of lapping a wave. This edge shape causes certain hidden dangers in the waterproofing of the panel joints of the steel structure factory building. However, it is generally not a problem when used as a wall.
2. Waterproof cavity type
The waterproof cavity type is to form a cavity of about 4mm at the two buckle edges. This cavity cuts off the capillary passage caused by the adhesion of the two steel plates, and the water column in the cavity also balances the phenomenon of rainwater seeping into the room caused by the difference in atmospheric static pressure between indoor and outdoor. This method has been applied to the design of the section shape of the new generation steel structure workshop profiled plate, which is a cost-effective method.
3. Bite type
The bite type is divided into 180° expansion and 360° bite type. This method is to use an undercut machine to bite the two overlapping edges of the sheet together, 180° undercut is a non-tight bite, and 360° is a tight bite. It is similar to the form of a tinsmith’s hand undercut, so it has a certain airtight effect. This type of plate is an ideal and reliable waterproof plate type, but the cost is higher than the previous ones.
4. Buckle cover type
The clasp plate type is symmetrical on two sides, and a bayonet structure edge is made on both sides. This method utilizes the principle of cavity type to set up the cover, which is waterproof and reliable, but the amount of color plate is too much.
