1. When selecting hardware fittings, try to choose products with guaranteed quality. The quality grade of hardware fittings should be consistent with the quality grade of doors and windows. The structure and shape of hardware fittings should be consistent with the profiles, the colors are harmonious and beautiful, the functions are correct, and the operation is flexible. Easy to install.
2. The installation of hardware accessories should be complete, standardized, reliable and accurate. After installation, the doors and windows are beautiful in appearance, flexible in opening, and free from deformation, obstruction and collision.
3. Exposed fasteners for hardware accessories should be preferred for stainless steel products.
4.When sliding doors and windows and large sliding doors and windows are closed, multiple locking points should be used. Otherwise, the air tightness will be greatly reduced under the action of negative pressure difference. Considering the convenience of operation, it is better to use multiple locking handles or actuators.
5. The length of the sliding door of the casement window is generally 2/3 of the width of the window sash. If the sash is lighter, it can be 1/2, and the length of the sliding sill of the upper hanging window is generally 1/2 of the sash.
6. Outside the typhoon area and high-rise buildings, the window sash is recommended to be installed by sliding brackets, with no or no hinges.

1. The sliding door sash and the upper and lower frame guide rails should be no less than 10mm, and safety measures such as anti-dropping block and anti-collision block must be installed to prevent the window sash from falling and opening and colliding.
2. The height of the lower frame of the glass window of the building exterior wall shall be not less than 900mm. In special cases, if it is less than 900mm, other protective safety measures (such as adding protective railings) should be taken.
3. The screws and bolts used for the connection of aluminum alloy doors and windows must be made of high-quality stainless steel to prevent rusting and corrosion of the screws. Stainless steel screws should be machine-threaded as much as possible. Try to avoid using self-tapping screws. The screw connection is preferably designed to be sheared.

Doors and windows and wall connection methods mainly include steel frame connection, dovetail iron foot welding connection, dovetail iron foot and embedded parts connection, fixed steel piece nail connection, fixed steel sheet metal expansion bolt connection and so on. The thickness of the dovetail iron feet should be ≥3mm. Fixed steel sheet thickness ≥1.5mm, width ≥15mm. All dovetail iron feet and fixed steel sheet surfaces shall be hot dip galvanized. The distance between the fixed points of the door and window connection is generally between 300mm and 500mm, and cannot be greater than 500mm.