There are many kinds of doors and windows used in home. Aluminum alloy doors and windows are  popular in the market. In order to guard against theft, the common doors and windows plus the crescent lock will be more safe.But how to install the aluminum alloy doors and windows,and a crescent lock can be mounted on it?
Generally,when install the doors and windows,the following points should be paid attention:
1. Easy operation and single point control. All kinds of opening functions are realized by changing the position of the handle;
2. Standardization and serialization. It can be enable door handle manufacturers and construction companies to install quickly;
3. Adjustable.Which has multiple directional adjustable function; if no special requirements, all hardware can be installed either left or right windows;
4. It can satisfy the maximum self-weight of window sash 130kg;
5. High performance for installation. The lock point can be barbed on the window frame on the lock block;
6. Widely used. Can meet all kinds of door and window opening requirements;
7. Strong adaptability. Can be used in the current market with standard European groove profile or no groove profile;
8. High quality specification
According to the characteristics of aluminum alloy door and window profile, when installing crescent lock, attention should be paid to:
1. Steel, strength and moment of inertia of the profile at the installation position;
2. Design of profile for thermal resistant structure;
3. Installation structure and moving space of crescent lock
4. Reasonable sealing structure design of aluminum alloy doors and windows
5. Reasonable Seal between door and window frame and Wall and corresponding profile structure
6. The structural requirements of the crescent lock for the opening mode of windows and doors
　To sum up, aluminum doors and windows installed with the crescent lock not only to ensure security, the most important is to conform to the daily life habits, easy to open doors and windows naturally.