Aluminum curtain wall panel construction & why should aluminum veneer leave gaps? How wide is the anti-seismic joint?

With the rapid development of the city, the curtain wall decoration is just like dressing. If you want to stand out in the colorful city, the novelty, safety, environmental protection and durability of curtain wall materials will become the basic characteristics. As we all know, aluminum alloy has excellent rigidity, light weight and strong plasticity, which is convenient for aluminum veneer curtain wall manufacturers to process and customize various shapes. However, careful friends will find that there are generally 10-20 mm wide anti-seismic adhesive joint when aluminum curtain wall panel is constructed. What is the reason?

Because metal curtain wall construction; there are mainly two kinds of node technology, the first is to leave glue joint construction, the main reason is that the cost of aluminum alloy curtain wall is more expensive than that of aluminum plastic plate, so the general thickness is between 1.5 ~ 3.0 mm. In order to increase the rigidity of the curtain wall panel, the manufacturer needs to carry out four side folding and fillet welding treatment, and at the same time, the installation of fixed corner codes at the four folded edges is staggered to facilitate the construction and construction Fixed. In fact, this is only the objective reason for the aluminum veneer curtain wall to leave seams, because the material precision produced by the powerful macro aluminum building materials curtain wall manufacturers is good. There is no problem to control the gap within 2mm for the 1200 * 2400mm plate. The subjective reason is that the curtain wall seam is safer than the seamless close fitting. Generally speaking, the construction is only to fix the corner bar on the keel steel frame behind the back plate. With the passage of time, due to the wind, sun and rain, the node screws are inevitably rusty and loose. It is easy to cause potential safety hazard, so the gap is left for gluing and sealing, which makes the curtain wall materials adhere and form a safe and firm whole. It can also reduce the deformation of curtain wall caused by foundation settlement.

There is also the so-called close splicing curtain wall construction, relatively speaking, the gap is relatively small, the early aluminum-plastic plate, because can not be bent and welded, so it is this way of construction. However, some of the curtain walls of our macro aluminum building materials have artistic patterns on the surface, such as punching, engraving, etc. if the curtain wall panel is sewn, it will affect the overall effect of the pattern. Sometimes, this method is also used. There are two kinds of seamless joints. One is that the back surface is made of wood and directly bonded with glue. This method can only be used indoors. Another construction method is still using steel frame keel, the joints are fixed with flat head screws or rivets, and the screws also need to be painted, so there is no color difference after construction.

aboutWidth of anti-seismic jointAnd sealant selection:

In the previous article, we mentioned that some houses will inevitably have slight foundation settlement problems in a few years after the completion of the project. At this time, the role of the 10-20 mm anti-seismic joint reserved for the aluminum curtain wall is obvious, which can offset the dislocation drop of the settlement, and prevent the curtain wall panel from deformation and bulging. Neutral weather resistant glue is generally used in the construction process, and color matching can be carried out according to the color of the board surface, even without color difference. Sealant general life in more than 10 years, so the aluminum curtain wall panel seam effect is very large!