How to improve the glass glazing in curtain wall system?

Glass walls are a common sight in modern cities. Glass curtain wall is mostly considered as a beautiful and novel method for building facade decoration. Especially hidden frame glass curtain wall has been widely used in large commercial buildings around the world nowadays.

In practical applications, hidden frame glass curtain wall is bonded to the aluminum alloy frame (sub-frame) through the silicone structural sealant, and then be fastened to the aluminum alloy frame by the fixed clamp and the stainless steel bolt. At the contact point, due to the different degree of tightness of the fastening bolts, the force transmitted to the glass through the structural adhesive is different, and the scene reflected by the glass surface will be distorted. In particular, after the installation of the glass into the hidden frame glass curtain wall, the glass surface tends to be distorted. Despite the heat treated glass flatness, some errors occurring in construction is another main reason for this problem. For example, the beams and column distance are generally different. As a result, after the glass is installed, the adjacent two pieces are not in a plane, and distortion will occur. In addition, in the process of filling structural adhesive and maintenance process, the structural adhesive would be pressed before curing, due to improper method. Therefore, it would result in different thickness of structural adhesive in curtain wall frames, and the surface of the glass will become uneven after installation.

Measures To Reduce Glass Distortion
1. Use a suitable connection method to make the surface of the glass evenly stressed. Specifically speaking, the aluminum alloy frame can be suspended on the aluminum alloy frame, and the glass naturally hangs down and the force is even.
2. Reasonable design of the fixed clamp spacing. According to experience, the distance between the first clamp and the glass edge is 100 ~ 150 mm, and the spacing between the intermediate clamps is preferably 250 ~ 300 mm.
3. In the structural adhesive and curing stage, to avoid the structural adhesive pressure can be separated between the glass components by the mat. And the height of the mat should be higher than the sum of the thickness of each structural adhesive of the aluminum frame.