Smoke blocking wall is a fixed or movable smoke blocking device made of non combustible materials that hangs no less than 500 mm from the ceiling. Mainly used in high-rise or super high-rise large shopping malls, office buildings, and warehouses, it can effectively block the horizontal flow of smoke under the building ceiling, improve the smoke exhaust effect in the smoke prevention zone, and play a certain role in ensuring the safety of people’s lives and property..
The smoke blocking vertical wall is made of non combustible materials and installed vertically under the ceiling, crossbeam or ceiling of a building, which can form a certain smoke storage space in the event of a fire..
① There are many types of smoke blocking vertical walls, which can be divided into two types based on their working principles: fixed (code D) and movable (code H).
Fixed smoke barriers are installed inside buildings with fixed positions and are usually made of fire-resistant materials such as steel plates, fiberglass, etc. They can maintain a vertical position in the event of a fire, effectively preventing smoke from spreading upwards. This type of smoke barrier is suitable for smaller spaces, such as rooms, corridors, etc., and can effectively reduce the impact of fires on other areas..
The movable smoke barrier can automatically adjust its position and angle based on the location and direction of fire occurrence, achieving effective smoke isolation. The movable smoke barrier is generally made of motors, transmission devices, and fire-resistant materials, and has the characteristics of easy operation and rapid response. In the event of a fire, the movable smoke barrier can be quickly activated, isolating the smoke in the fire area and buying valuable time for personnel evacuation. This type of smoke barrier is suitable for larger spaces, such as shopping malls, office buildings, and other densely populated places..
② According to the stiffness performance of smoke blocking component materials, smoke blocking vertical walls can be divided into flexible smoke blocking vertical walls (code R) and rigid smoke blocking vertical walls (code G).
The flexible smoke barrier is made of flexible materials, such as fabrics, fiber fabrics, etc. When a fire occurs, the smoke barrier will automatically shrink under the action of smoke, forming an effective barrier to prevent smoke from spreading to other areas. Flexible smoke barrier walls have good fire resistance, thermal insulation, and tensile resistance, and can maintain stability in high temperature and humidity environments. In addition, the flexible smoke blocking vertical wall also has advantages such as aesthetics, easy cleaning, and easy maintenance..
The rigid smoke barrier is made of rigid materials such as metal, concrete, etc. Compared with flexible smoke blocking vertical walls, rigid smoke blocking vertical walls have higher strength and fire resistance performance. In the event of a fire, a rigid smoke barrier can quickly form a solid firewall, effectively isolating the fire source and smoke. The rigid smoke blocking vertical wall is suitable for fire compartments, stairwells, corridors and other places inside buildings..
The effective descending height of the smoke blocking vertical wall should not be less than 500mm.
The width of a single section of a rolling shutter type smoke barrier wall should not exceed 6000mm.
The width of a single section of the flip panel smoke blocking vertical wall should not exceed 2400mm.
When a fire occurs inside a building, the scorching smoke quickly rises and accumulates around the ceiling. Without barriers, smoke will quickly spread along the ceiling to the entire interior of the building, forming a smoke layer..
In a fire, the lateral diffusion speed of smoke is very fast. After the smoke covers the entire ceiling, it will continue to spread downwards along the wall..
A simple and effective way to limit the spread of smoke is to artificially divide the ceiling into multiple small areas.