Precautions for fire door

There are many types of fire doors, such as glazed fire doors, stainless steel fire doors, and ordinary steel fire doors. However, the installation methods are basically the same with little difference, depending on the site conditions. Some common installation parameters must be noted.

1、 The fire door shall be installed according to the type of fire door used, and the appropriate installation method shall be adopted.

2、 The door frame of the fire door can be fixed with the wall by expansion bolts, or iron parts can be embedded at the opening when building the wall, and welded firmly with the door frame connector during installation.

3、 No matter what kind of connection mode is used between the door frame and the wall, there should be no less than 3 anchor points on each side, and they should be firmly connected.

4、 When installing the fire door, it should be aligned and hoisted. After the size is appropriate, it should be temporarily fixed, corrected and adjusted. The connection and anchorage can be carried out after there is no error.

5、 The sliding door shall be flexible after installation; The side hung door is easy to open and tight and firm to close.

6、 Door closers must be installed on fire doors, and sequencers must be installed on opposite doors.

7、 Hardware accessories such as handle and fire lock on the fire door must be complete;

8、 It is required that the clearance from the ground plane shall not be greater than 5mm.

The price of steel fire doors is moderate, but they are heavy, hard to open, monotonous and not beautiful enough, so they are mostly used in industrial buildings and general grade civil buildings, or parts of buildings that have low aesthetic requirements and low normal flow of people (such as machine rooms, garages, etc.); On the contrary, wood fire doors have light deadweight, flexible opening and closing, good decorative appearance and many patterns, but their prices are high, and they are mostly used in middle and high grade civil buildings or important occasions in buildings. Generally, the applicable size of large opening for each fireproof door is about 3.3m high, 1.1m wide for single leaf and 3.0m wide for double leaf. In addition to setting fire doors in strict accordance with the site, position, width, grade and opening direction required by the specification, attention should also be paid to:

Fire doors are generally located on evacuation routes (such as stairwells, antechambers, walkways, etc.). A little carelessness in the design of building plane details may cause the door leaf to block the evacuation route after opening, reduce its effective width, and violate the basic requirements for personnel evacuation. This phenomenon is particularly prominent at the turning point of the evacuation path and in high-rise residential buildings, which should be paid attention to and avoided.

Evacuation exit to adjacent zones

Under certain conditions, when Class A fire doors leading to adjacent fire compartments are set, only one emergency exit is allowed for each compartment in high-rise buildings. It should be noted that since the fire door can only be opened in one direction, if there is only one emergency exit in two adjacent partitions, two fire doors should be set on the firewall and opened to both sides respectively to meet the needs of mutual evacuation between the two partitions.

The normally closed fire door is often used. Its door leaf is always closed. When people pass, it is opened manually and closed automatically through the rear door leaf; If the push latch hardware is installed, the evacuation speed will be accelerated. However, the normally closed fire door set in the public passageway has the disadvantages of affecting the ventilation and lighting, blocking the line of sight, and inconvenient access in normal use. If the management is not good, the door closer and the opening and closing hardware are often damaged and failed, resulting in potential safety hazards. The normally open fire door just solves the above problem. Usually, its door leaf is fixed in the open position by the door fixator, and the door fixator automatically releases in case of fire, restoring the same function as the normally closed fire door. Due to the addition of door fixing device and automatic release system, and sometimes linkage with automatic alarm system, the use of normally open fire doors will inevitably increase the project cost. The current fire code does not make mandatory provisions on the opening and closing mode of fire doors, which can be determined by the designer by comprehensively considering the height of the building standard, the characteristics of the use occasions, the management needs of building users and economic factors