Product Features

In practical applications, the synergistic interaction between fire curtains and other fire-protection systems is of paramount importance. For instance, in the atrium areas of high-rise buildings, fire curtains can be used in conjunction with fire-resistant rolling shutters to create a three-dimensional fire-separation system. When a fire breaks out, the fire curtain rapidly descends to block the horizontal spread of smoke and hot gases, while the fire-resistant rolling shutter lowers vertically to seal the atrium opening, thereby preventing the fire from spreading upward. This coordinated operation not only enhances the building’s fire safety but also buys valuable time for evacuation and firefighting rescue operations. In addition, the complementary role of fire curtains and fire doors is equally critical: fire doors effectively prevent the spread of fire and smoke through passageways, while fire curtains further reinforce the smoke-control performance at passage entrances, ensuring that escape routes remain relatively free of smoke. Looking ahead, as technology continues to advance, fire curtains will become increasingly intelligent and lightweight, and their integration with other fire-protection systems will grow even closer, collectively establishing a safer and more reliable building fire-protection framework.

A firestop smoke-control drop curtain is constructed from non-combustible materials and installed vertically beneath a building’s ceiling, beams, or suspended ceiling. In the event of a fire, it creates a smoke-reservoir space and effectively prevents the horizontal spread of smoke and hot gases, serving as a smoke-control partition.

A firestop smoke-control curtain is a vertical partition made of non-combustible materials, installed vertically beneath a building’s ceiling, beams, or suspended ceiling. In the event of a fire, it creates a smoke-reservoir space and effectively prevents the horizontal spread of smoke and hot gases.

### Core Features

1. **Physical Barrier**: Upon sagging, it forms a vertical barrier that interrupts the lateral spread of smoke and confines high-temperature flue gases within the smoke-control zone where the fire source is located.

2. **Coordination with the Smoke Exhaust System**: Works in conjunction with mechanical or natural smoke exhaust outlets to create negative pressure within the vertical wall–partitioned zones, thereby accelerating smoke removal and preventing its spread into evacuation routes.

3. **Maintain Visibility in Evacuation Routes**: By controlling smoke spread, ensure that visibility in evacuation stairwells, emergency exits, and other designated areas is ≥10 meters, thereby guaranteeing the safe evacuation of personnel.

### Structural Classification

1. **Fixed type**:

- **Materials**: fire-resistant glass, steel plates, non-combustible inorganic composite panels, inorganic fiber fabrics, etc.

- **Features**: Permanently installed, structurally stable, maintenance-free, and suitable for complex and variable smoke-control zones.

- **Applications**: Locations with high requirements for structural stability, such as underground parking garages and large shopping malls.

2. **Activity-based**:

- **Materials**: Fire-resistant rolling shutter fabric (composite of glass fiber fabric and fire-retardant coating), motor, control module, etc.

- **Features**: Electrically or manually operated; automatically drops in the event of a fire (drop time ≤ 60 seconds); normally concealed within the suspended ceiling or roof structure, with no impact on the building’s aesthetic appearance.

- **Applications**: Spaces with suspended ceilings, such as mall corridors and subway platforms.

### Material Requirements

1. **Non-combustibility**: The materials shall meet Class A non-combustibility standards, such as inorganic fiber composite panels, metal panels, and fire-resistant glass.

2. **Structural Stability**:

- Metal sheet thickness ≥ 0.8 mm, melting point ≥ 750°C.

- The thickness of the non-combustible inorganic composite panel shall be ≥10.0 mm.

- Fire-resistant glass shall comply with the GB 15763.1 standard.

3. **Smoke-Blocking Sealing Performance**:

- Fire-resistant sealant shall be applied to fill the joints between vertical walls and ceilings or wall surfaces.

- The operable vertical curtain fabric shall be free of damage and seam gaps.

### Specifications

1. **Droop Height**: The effective droop height shall be ≥500 mm; typically, when the area of each smoke-control zone is ≤500 m², the droop height shall be ≥500 mm. When the clear room height exceeds 3 m, the droop height shall be calculated using the following formula: $h = 1.6 + 0.1 \times (H - 3)$, where $H$ represents the clear room height.

2. **Single-section width**:

- Rigid smoke-control vertical curtains (e.g., metal panels, fire-resistant glass) shall have a single-panel width of no more than 2,000 millimeters.

- Flexible smoke-control curtains (e.g., made of inorganic fiber fabric) shall have a single-section width ≤ 4,000 mm.

3. **Operational Performance**:

- The operating speed of the operable roller-type smoke barrier shall be ≥0.07 m/s.

- The operating time of the movable, flap-type smoke barrier shall be less than 7 seconds.

### Installation Requirements

1. **Installation Location**: The bottom of the vertical wall shall be at least 2.8 meters above the floor to ensure safe passage for personnel.

2. **Fixing Method**:

- Fixed vertical wall panels shall be secured to the building’s primary structural elements (such as concrete beams or steel structures) using expansion bolts or by welding; attachment to non-load-bearing components, such as ceiling grid members, is strictly prohibited.

- The operable vertical wall guide rail shall be installed vertically, with a deviation of ≤3 mm per meter and a total deviation of ≤10 mm over the entire length.

3. **Interlocked Control**: The system shall be interlocked with the fire alarm system to ensure automatic deployment of the drop-down mechanism in the event of a fire, while also providing manual control for emergency use.

### Maintenance Management

1. **Regular Inspections**: Conduct monthly checks for surface cracks and deformation, ensure that joints with walls and ceilings are properly sealed, and verify that bolts are securely tightened; for operable units, test both manual and automatic lowering functions.

2. **Quarterly Maintenance**: Clean the fabric of the movable smoke-control damper curtain and its guide rails to remove dust and grease; inspect the electrical wiring for damage to the insulation and check the terminals inside the control box for looseness.

3. **Troubleshooting**: When deformation of the vertical wall, motor failure, or seal failure is detected, the equipment must be immediately shut down and repaired; “operation while faulty” is strictly prohibited. Repair records must be archived and retained for at least three years.