What are the requirements for selecting glass for curtain walls?

The glass used in glass curtain walls should be safety glass, mainly including tempered glass, laminated (safety) glass, insulating glass, fire-resistant glass, solar control coated glass, and low-emissivity (Low-E) coated glass. Specific selection requirements are as follows:

1. The facade should utilize safety glass, with a thickness not less than 6mm. The thickness of the glass in the full glass facade ribs should not be less than 12mm.

When using heat-reflective coated glass for glass curtain walls, vacuum magnetron sputter coating glass or online thermal spraying coated glass should be employed. The appearance quality and technical specifications of float glass used for heat-reflective coated glass should comply with the requirements for superior or first-grade products in the current national standard "Float Glass" (GB11614).

The hollow glass for curtain walls should use double-sealed design.

Insulated glass for framed curtain walls should use polysulfide and butyl sealants, while for semi-framed curtain walls, it should use silicone structural sealant and butyl sealant. The coated surface should be on the second or third surface of the insulated glass.

4. The interlayer glass of the curtain wall should be made by dry processing with polyvinyl butyral (PVB) film. The thickness of the interlayer adhesive (PVB) for the point-supported glass curtain wall should not be less than 0.76mm.

5. Tempered glass should comply with the regulations of GB9963 "Tempered Glass."

All curtain wall glass should be processed at the edges.

What are some additional suggestions for choosing curtain wall glass?

Frame-supported glass curtain walls should use safety glass.

The frame-supported glass curtain wall includes both exposed and concealed frame styles, which are widely used in glass curtain wall projects. This regulation is in place to ensure the safety of the glass curtain wall during installation and use.

Safety glass generally refers to tempered glass and laminated glass.

Curved glass curtain walls refer to those with an angle of intersection with the horizontal plane less than 90 degrees and greater than 75 degrees; the particles of shattered glass can also affect safety. Laminated glass, which does not disperse upon shattering, can offer protection against pedestrian traffic and should be prioritized.

2. The panel glass for point-supported glass curtain walls should be of tempered glass.

The glass panels for point-supported glass curtain walls should be made of tempered glass and its products; otherwise, the strength will not meet the requirements due to stress concentration at the drilling locations.

3. The point-supported glass curtain wall with glass rib support shall use tempered laminated glass for the glass ribs.

Point-supported glass curtain walls with glass rib support, where the rib glass constitutes the supporting structure, exhibit significant stress concentration at the drilling points, necessitating high strength requirements; on the other hand, if the glass rib breaks, the entire curtain wall may collapse. Therefore, tempered laminated glass should be used.

4. Other Public Places

High-traffic areas, public spaces where teenagers or young children are active, and parts that are prone to impact during use should have clear warning signs. Glass facades in public spaces with high pedestrian traffic, where teenagers or young children are active, are susceptible to being squeezed and hit; in other buildings, areas of the facade that are likely to be hit during normal activities can also easily cause glass damage. To ensure personnel safety, safety glass should be used in these situations. Clear warning signs should also be set up for glass facades that are prone to impact, to prevent harm from accidental collisions.

When the outer edge of the floor adjacent to a glass curtain wall lacks a solid wall, collision protection facilities should be installed.