The security door is an important guarantee for home security, and its grade is divided into four levels: A, B, C, and D according to national standards. Below we will detail the differences between these four levels.
1. Grade A security door.
Class A security door is the highest level of security door, its anti-vandal time is not less than 30 minutes, anti-technical opening time is not less than 5 minutes. Grade A security doors are usually made of high-quality steel plates, and the thickness of the door leaf is greater than or equal to 10 mm, the thickness of the door frame is greater than or equal to 15 mm, with greater resistance to vandalism. In addition, the Class A security door is also equipped with a three-way lock, using multi-row thickened anti-prying steel core, multi-lock point design, more safe and reliable.
Second, the class B security door.
Class B security door is the next highest level of security door, its anti-vandalism time is not less than 15 minutes, anti-technology opening time is not less than 1 minute. Class B security doors are usually made of high-quality steel plates, and the thickness of the door leaf is greater than or equal to 08 mm, the thickness of the door frame is greater than or equal to 12 mm. Compared to Class A security doors, Class B security doors have relatively simple locks, but they still have high security.
3. Class C anti-theft door.
Class C security door is a medium-level security door, its anti-vandalism time is not less than 10 minutes, and the anti-technology opening time is not less than 1 minute. Class C security doors are usually made of ordinary steel plates, and the thickness of the door leaf is greater than or equal to 06 mm, the thickness of the door frame is greater than or equal to 10 mm. Although the locks of Class C security doors are relatively simple, they still have some anti-theft performance.
Fourth, the D level security door.
Class D security door is the lowest level of security door, its anti-vandal time is not less than 6 minutes, anti-technical opening time is not less than 60 seconds. Class D security doors are usually made of inferior materials, which are of poor quality and can be easily damaged. Although the locks of Class D security doors are relatively simple, they are less secure and are not suitable for home use.
To sum up, there are obvious differences between the four levels of anti-theft doors A, B, C, and D in terms of anti-vandalism time, anti-technical opening time, material quality, locks, etc. When choosing an automoatic door, you should choose the right level according to your needs and budget. Generally speaking, Class A security doors have higher security, but they are also relatively high;Although the Class D security door is cheap, it has low security and is not suitable for home use.