For a long time, the definition of the curtain wall and the door and window in the industry has not been unified. Both of them belong to the building maintenance structure, and they do not share the force of the main structure. Some boundary practices make the qualitative doors and windows or the curtain wall become a problem. In order to ensure the appearance and consider the cost saving, many companies often use the door and window materials to design and manufacture the curtain wall effect. To some extent, it not only brings trouble to the construction acceptance, but also the maintenance structure thus produced also poses a hidden danger to the safety. . In order to avoid the continuation of such conditions, the concept of glass curtain wall is clearly defined in the technical specification of glass curtain wall engineering (JGJ102-2003): it consists of a supporting structural system and a panel, and can have a certain displacement capacity relative to the main structure. An external maintenance structure or a decorative line structure that does not share the role of the main structure.
One point is mentioned here: there is a certain displacement capacity relative to the main structure. The door and window as the maintenance member of the support in the hole of the main structure cannot meet the ability of the main body structure to have a certain displacement. In the curtain wall design, the overall frame is suspended on the outside of the main structure, and the relative displacement can be ensured by designing measures such as expansion joints.
Second, the difference between standard specifications
The state has introduced "Aluminum Alloy Doors and Windows" (GBT8478-2008) as the latest national standard for doors and windows. Each province and region has its own provincial (land) standard. For example, Jiangsu Province "Aluminum Alloy Door and Window Engineering Technical Regulations" (DGJ32/J07-2005), Guangdong Province "Aluminum Alloy Door and Window Engineering Design, Construction and Acceptance Specifications" (DBJ15-30-2002), etc., meet in the design of aluminum doors and windows Under the premise of the requirements of the national standard, it is necessary to meet the requirements of the provincial standards in each region to ensure the local acceptance. "Gastight, watertight, wind pressure resistance grading and testing methods for building exterior doors and windows" (GBT7106-2008) is the latest national standard for performance testing and grading of doors and windows. "Glass Curtain Wall Engineering Technical Specification" (JGJ102-2003) has always been the leader of the curtain wall industry standard, and has been widely recognized by the industry. The national standard "Building Curtain Wall" GB/T21086-2007 has made a more comprehensive elaboration and agreement on the curtain wall system; "Building Curtain Wall" (GB/T21086-2007), "Building Curtain Wall Airtight, Watertight, Wind Pressure Resistance Testing Method" (GB/T15227-2007) provides the basis and method for curtain wall engineering performance testing and grading.
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