The glass of the
exposed frame aluminum curtain wall is embedded in the aluminum frame to become a curtain wall component with aluminum frames on four sides. The exposed frame aluminum curtain wall is the most traditional form, the most widely used, and the working performance is reliable. Compared with the hidden frame aluminum curtain wall, it is easier to meet the construction technical level requirements. Framework materials, plates, sealing and caulking materials, among which the framework materials are mainly aluminum alloy profiles. Usually, hot extruded profiles are used in curtain walls, which are profiles that are rapidly cooled by high temperature extrusion, and are treated with anodized surfaces in an artificial aging state. The surface of the profile should be clean, no cracks and peeling, corrosion and air bubbles are allowed.
According to the design requirements of the construction organization, it is necessary to check whether the specifications of the window sash are consistent with the design drawings and construction drawings before installing the sash, and take appropriate protective measures to prevent it from falling off during installation. The window sash should be cleaned before installation, and attention should be paid to the matching clearance between the window sash and the window frame up and down, left and right, front and rear, inside and outside to ensure its tightness. The specifications, varieties and quality of the sash connectors must meet the design requirements, and stainless steel or light metal products should be used. It is strictly forbidden to reduce the number of self-tapping screws and other fasteners for connection without permission, and the diameter of the bottom hole of the self-tapping screws should be strictly controlled.
In addition, the exposed frame aluminum curtain wall not only participates in the indoor and outdoor heat transfer, but also the aluminum alloy frame participates in the indoor and outdoor heat transfer. In a curtain wall unit, the glass area far exceeds the area of the aluminum alloy frame, so the thermal performance of the glass is dominant in the clear frame glass curtain wall.