On what signs of metal doors are classified
Any of us, in everyday life, constantly collides with metal doors. For most – this is an integral element of the interior. For the first time, metal doors appeared as an alternative to wooden, in the seventeenth century, and since then are a guarantor of reliability and protection.
There are several basic signs, on the basis of which, you can classify metal doors.
1. By the method of opening:
– swing;
– lifting;
– sliding;
– Greifer.
2. By location:
– internal;
– external;
– Special.