(1) Aluminum alloy profile doors and Windows should be selected according to the specifications of the door and window holes and the relative height of installation. For housing engineering projects aluminum alloy profiles cross section, flat window manufacturers are not less than 55 series of products; No less than 75 series of Windows; No less than 75 series of products from the factory. The thickness of aluminum alloy door and window profiles is not less than 1.4mm, and the wall thickness of the door profiles is not less than 1.5mm.       

        (2) when door and window frames are installed, connecting pieces should be used to make reliable connection with the wall. The distance between a connector and the edge of the frame cannot exceed 180mm, and the distance between the connector and the edge of the frame cannot exceed 50Omm. The connecting parts shall be made of aluminum plates of no less than 1.5mm in thickness, and shall be corrosion-proof. Industrial aluminum profile manufacturers generally use demagnetization automatic screw, needle or open and iron foot buried in the wall body, not round, needle will immediately nail the door and window frame fixed wall.        

        (3) when installing the composite doors and Windows, special attention should be paid to the effective setting of the stiff and medium, to ensure the overall bending stiffness of the pieced components and doors and Windows, and the specification and model interval of the connecting parts meet the provisions, and should be closely connected.