According to the third national building regulation, the standard fire door is a standard door which, by carrying out a "standard fire test", has the conditions of resistance and fire protection appropriate to its location, and a set of elements including the door leaf, frameworks, and Other components that provide a total degree of fire protection.

The time required for protection against fire shall be determined in accordance with the regulations and building codes of the reference. By definition, the duration of an anti-fire door, in accordance with the standard test, is capable of withholding fire, is a fire protection rating expressed in terms of hours or minutes.

Only doors can be used as anti-fire doors to protect openings that have been tested with the same complete specimen and their degree of protection is in accordance with one of the most respected fire resistance test standards.
A complete duct is said to have a frame, locks and fasteners, glass jar surfaces (if any), supplies and related parts (as they are in the desired openings). Fireproof doors must be completely and completely finished to the place and can be installed without any tampering that would compromise their specifications.
All fireproof doors must have the following general specifications:

A) must have one of the following technical documents:

1) Have a fire test report from the building and housing research and urban planning center.
2) have the confirmation and fire test report from internationally recognized centers and laboratories (such as TBW, Warrington, LPCB, UL, etc.).
3) For specific projects, the actual sample is taken in full measure of the location of the project by a monitoring device or a trusted third party entity and a standard fire test is carried out by a valid laboratory.

The fire test report must be presented in comparison with the reference regulations and project requirements.
B) in fire-fighting, as required, the position of the building in accordance with the provisions of reference systems
Relax with a relaxed, automatic and packaged anti-punch handle.
Exception: Fire doors based on common walls separating sleeping units in residential apartments can
Do not have a self-contained or automated system.

(C) After closing, it must be possible to block the spread of fire and smoke from each side to the other.

D) Provide fire protection time in accordance with the regulations and building codes of the reference.

For the first time in Iran, Kasheng Gostar Qeshm Co. has been able to produce a metal fireproof door with a resistance time of 240 minutes, approved by the Research Center for Roads and Housing and Urban Planning and the Fire Department. In July 2014, it successfully passed the BS EN 1634 fire test at the Research Center for Roads, Housing and Urban Development, and left a unique record in Iran.

The Department of Fireproof Doors, Fireproof Glass and Curtain is less than a year after the last test of its production unit in October last 77 minutes, on July 1, 2014, received a 4-hour test of the Road and Housing Research Center And urbanization.

It is worth mentioning that in the installation of fireproof doors, commonly used polyurethane foams are used when exposed to cyanide gas, which is a toxic gas, if the company installs fireproof anti-fire extinguishing foam With a resistance of 120 minutes (EI 120) with the approval of EN 1366-4: 2006 and EN 13501-2: 2007 + A1: 2009.