Analysis of common problems at fire acceptance site – fire door 2

Acceptance items: Fire separation

On-site problem description 4:

Steel fire door frame is not filled with cement mortar;

The steel fire-resistant window frames are not filled with cement mortar. In particular, you need to pay attention to whether the upper and lower frames of the fire-resistant doors and windows are filled in place.

Relevant specification requirements:

\”Code for Construction and Acceptance of Fireproof Roller Shutters, Fireproof Doors and Fireproof Windows\” GB50877—2014:

5.3.8 The door frame of steel fire doors should be filled with cement mortar. The door frame and the wall should be firmly connected with embedded steel parts or expansion bolts, and the distance between the fixed points should not be greater than 600mm.

5.4.2 The steel fireproof window frame should be filled with cement mortar. The window frame and the wall should be firmly connected with embedded steel parts or expansion bolts, and the distance between the fixed points should not be greater than 600mm.

On-site problem description 5: The fire door does not have a permanent sign in an obvious location, or the sign is not comprehensive.

Relevant specification requirements:

\”Code for Construction and Acceptance of Fireproof Roller Shutters, Fireproof Doors and Fireproof Windows\” GB50877—2014:

4.3.2 Each orange fire door shall be equipped with a permanent sign on its visible part, and shall indicate the product name, model, specification, fire resistance and trademark, name and address of the production unit (manufacturer), and date of manufacture. And product production batch number, implementation standards, etc.

On-site problem description 6:

The inclination angle of the outdoor evacuation stairs is greater than 45°, the evacuation door is facing the stairs;

Open doors, windows, and openings on the wall within 2m around the outdoor evacuation stairs.

Relevant specification requirements:

\”General Code for Building Fire Protection\” GB55037-2022:

7.1.11 Outdoor evacuation stairs shall comply with the following requirements:

1. The height of the handrails of outdoor evacuation stairs should not be less than 1.1m, and the inclination angle should not be greater than 45°;

2. Except for the outdoor evacuation stairs of buildings with 3 floors and below, which can be made of flame-retardant materials or wooden structures, the steps and platforms of the outdoor evacuation stairs are Non-combustible materials should be used;

3. Except for evacuation doors, there should be no other openings on the wall within 2 meters around the stairs, and the evacuation doors should not face the stairs.

\”Code for Fire Protection Design of Buildings\” GB50016-2014 (2018 Edition):

6.4.5 Outdoor evacuation stairs should comply with the following regulations:

3 , stairs and platforms should be made of non-combustible materials. The fire resistance limit of the platform should not be less than 1.00h, and the fire resistance limit of the stairs should not be less than 0.25h.

4. The door leading to the outdoor stairs should Use Class B fire doors and open outwards.

5. Except for evacuation doors, 2m around the stairs There should be no doors, windows or openings on the interior walls. Evacuation doors should not face stairs.

On-site problem description 7:

Indoor rooms of residential buildings larger than 54m that are set up against exterior walls are not equipped with Class B fire doors as required by the design.

Related specification requirements: span>

\”Code for Fire Protection Design of Buildings\” GB50016-2014 (2018 Edition):

5.5.32 For residential buildings with a building height greater than 54m, each household should have one room that meets the following requirements:

1. It should be set up against the exterior wall, and the exterior window should be openable;

2. The fire resistance limit of the internal and external walls should not be less than 1.00h. The door of the room should be a Class B fire door. The fire resistance integrity of the exterior windows should not be less than 1.00h. .

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