Security door size

The national standard door generally has four specifications, the height is 2050mm and 1970mm, and the width is 860mm and 960mm. After the combination, it can be: 2050*860, 2050*960, 1970*860, 1970*960, and the height is 2050mm. For a door frame with a total height of 2.05 meters, if the height of the door opening is 2070mm, the user can purchase a height of 2050mm. It is necessary to leave a margin of about 20mm, which is easier to adjust during installation. Doors are divided into two types: outward opening and inward opening, but the direction to identify the door is to be identified outdoors. The directions are divided into: open left outside, open right outside, open left inside, and open right inside. The opening direction is determined by the hinge (hinge) side. Take the outer left opening as an example: people face the door opening outdoors, the hinge (hinge) on the left hand side is the outer left opening, and so on.