Fireproof metal door

Everyone knows what irreparable damage can cause a fire. Therefore, in order to preserve material values, and, first of all, to protect human lives, in places where people gather (for example, in commercial or office buildings, living rooms), it is recommended that metal fire doors be installed.

Metal fire extinguishing doors

Since the task of such doors is to block the penetration of fire into a particular room and to withstand its impact for quite some time, an indispensable requirement for doors of this type is the use of non-combustible materials for their production.

As a rule, high-quality steel is used to make the door leaf of fire doors. The interior space of the door (in a constructive way the door resembles a kind of box) is filled with special refractory materials that protect it from heating and burning itself. That is, even under the influence of direct fire, the door does not deform, there will be no change in the mechanism of its opening and closing. Of the same special materials that do not heat up and do not break down when exposed to high temperatures, handles are made for fire doors. And the mechanism of the door handles is such that, if necessary, they will easily open even a small child or a weak old man. Outside, fireproof metal doors are covered with special fire-resistant polymer-powder paint.

For greater decorativeness, such doors can be clad with various materials, for example, wood. Of course, in case of a fire, all the decorative elements will be lost, but the values ​​inside the premises will be preserved.

With all the necessary requirements for the technology of manufacturing fireproof doors and, depending on the design features, they (doors) can withstand the direct effects of fire for 30 to 90 minutes. Speaking of the construction of doors.

Types of fireproof metal doors

Depending on the number of leaflets (canvases), fireproof metal doors are divided into two types - single-field and two-field. Technical and operational qualities are exactly the same for them, with the only difference being that in view of the large sizes, double-leaf doors have a higher cost.

Also it should be said that the double-leaf fireproof metal doors are made in such a way that the doors (canvases) open in one direction (an indispensable requirement of fire safety rules). Double-leaf doors, depending on the ratio of the width of one leaf to the width of the other leaf, can be equal or different. Installation of this or that type of fire-prevention door is caused, first of all, by the sizes of a doorway and appointment of a premise.

As a rule, one-piece fireproof doors are installed in residential, utility or technical rooms. Double-field fire doors are usually installed in large warehouses with intensive cargo traffic. It is mandatory for the installation of both single-ended and double-field fireproof metal doors, a special seal should be used, which will prevent the penetration of toxic combustion products into the room. Also it should be said that there are options for installing glazed (glazing can be up to 25% of the door leaf area) of both types of fire doors. As an insert in this case, a special high-strength refractory glass is used.