What are the relevant acceptance issues for fire-resistant rolling shutters?

　　The following issues have been encountered during fire inspection and acceptance of fire-resistant rolling shutters:

　　1. The curtain panel coating has peeled off and rusted, and the panel exhibits obvious dents, protrusions, and holes. The rolling shutter door is a complete fire protection product; if there are any issues with the curtain panel, it will directly affect the fire-resistance rating of the rolling shutter door.

　　2. The guide rail is deformed, the curtain panel is stuck, or the curtain panel does not slide down smoothly. Typically, Fire-resistant rolling shutter door Move along the guide rail. If the guide rail is twisted or broken, Fire-resistant rolling shutter door It cannot be moved to the designated location and thus fails to achieve the intended fire separation effect.

　　3. On roller shutters, the lower limit switch may fail or the limit switch wiring may be connected incorrectly. This situation frequently occurs with fire-rated roller shutters in atriums. Since the fire-rated roller shutter doors in atriums are sometimes installed outside the upper-level corridors, there is no floor slab beneath the shutter to close off the space, leaving a large gap that makes it impossible to achieve fire separation between the upper and lower floors.

　　4. The mechanism fails to operate, the button contacts are burned out, the wiring is blocked, or the curtain panel can only move up or down—phase is incorrect, resulting in the up and down directions being reversed. Partial. Fire-resistant rolling shutter door Installed in ordinary corridors or evacuation routes—places where people need to evacuate—these areas require a device for manually controlling the operation of rolling shutters. If such equipment malfunctions, it could lead to unnecessary casualties and losses.

　　5. The upper part or sides of the rolling shutter door are not fully sealed, or the sealing materials used do not meet the required fire-resistance rating. This issue frequently arises during fire safety acceptance inspections. Typically, construction contractors or rolling shutter manufacturers install and commission rolling shutter doors at openings in firewalls without properly sealing the space above the shutter motor or between the sides of the shutter and its guide rails. As a result, hot smoke and gases can easily pass through the gaps—lacking adequate separation—between the motor and guide rails on either side of the shutter, spreading into the next fire compartment and causing extensive fire propagation.

　　6. The owner installed products such as stainless steel rolling shutters that had not been tested by a national inspection agency. Some organizations, lacking knowledge about fire protection products, mistakenly believe that any steel roller shutter can achieve the desired fire-separation effect. However, few people are aware that rolling shutters actually offer fire-resistant, smoke-preventing, and heat-insulating functions. In the event of a fire, ordinary rolling shutters either melt or fail to provide effective thermal insulation and smoke prevention.

　　7. The vertical speed of the roller shutter does not meet the requirements. National standards require... Fire-resistant rolling shutter door The average vertical speed should be 3 m/min. During the fire safety acceptance inspection, fires occasionally occur. It has now been confirmed that the fire联动 system has been activated; however, the rolling shutter door is descending too slowly, and the entire process takes nearly six minutes or longer. By then, hot smoke has already spread to another fire compartment, rendering the fire-resistant partitioning function of the rolling shutter door completely ineffective.

　　8. The owner himself reinstalled the rolling shutter door. Nowadays, many places are blindly pursuing elegance and consider fire-rated rolling shutter doors to be too unsightly. These doors have been modified—in some cases, decorative elements are installed beneath the baseplate, preventing the shutter from fully descending to the ground. For instance, in dual-track, dual-curtain inorganic composite fire-rated rolling shutter guides, space constraints have led to a reduction in the spacing between tracks, thereby failing to meet the product’s original fire-resistance rating requirements. Although these changes may seem minor, they all compromise the fire-separation effectiveness of the rolling shutter door. 9. Some doors lack a self-weight descent mechanism or are inconvenient to operate. Fire-rated rolling shutter doors offer four different descent methods: fire-alarm-linked electric control descent, manual electric control descent, chain-operated manual descent, and self-weight descent mechanisms. Unfortunately, some organizations cut corners during construction by omitting this crucial device altogether, seeking to maximize profits at the expense of safety.

　　10. The self-weight closing mechanism has failed, causing the shutter to either fail to stop or lack consistent speed performance. Currently, many organizations installing fire-rated rolling shutters only install the self-weight closing mechanism without conducting any tests. During fire inspections, it is common for the self-weight closing mechanism to activate yet the rolling shutter fails to descend.

　　11. The fire-resistant rolling shutters installed on evacuation passageways and exits lack control buttons on both sides and do not feature a mid-value delay function. They can only be activated by smoke detectors. These three issues frequently arise during fire safety inspections, and the underlying cause is substandard workmanship and material substitution during construction.

　　12. Fire-resistant rolling shutters are connected only to a single detector on one side or to a set of detectors opposite the fire-resistant rolling shutter. During commissioning of fire-resistant rolling shutters, errors frequently occur due to incorrect programming of the interlocking logic, causing the rolling shutter to fail to activate as required by the relevant standards.

　　13. Fire-fighting power supplies must not be used for fire-resistant rolling shutters. Some organizations, when installing rolling shutters, mistakenly connect the shared lighting power supply to the rolling shutter’s power box, causing the rolling shutter’s power supply to be cut off when the fire alarm system is activated, thus preventing the rolling shutter from descending.

　　14. The power control cables for fire-resistant rolling shutters do not meet the requirements; wires are either exposed or protected only by yellow wax tubing. Exposed metal conduits have not been provided with fire protection measures as required. According to national standards, all exposed fire-fighting pipelines must be enclosed in metal conduits and coated with fire-retardant paint on the exterior of these conduits. Some installation companies frequently forget or skip this step.