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Adhering to internationally recognized fire safety standards, Class A Insulated Fire-Resistant Windows meet stringent core performance requirements, with all parameters verifiable and suitable for overseas acceptance. The product achieves dual compliance in fire resistance integrity and fire insulation, with a continuous fire resistance duration of no less than 1.5 hours. Under fire conditions, the average temperature rise on the unexposed side of the window will not exceed 140°C, and the highest single-point temperature is strictly controlled below 180°C. Simply put, even if the front is subjected to continuous high-temperature exposure to open flame, the back of the window will not become excessively hot or experience heat penetration, effectively preventing spontaneous combustion of surrounding building materials, burns to personnel, and the spread of fire across areas through heat radiation.
Class A Insulated Fire-Resistant Windows prioritize high-end facade compatibility. The profiles meet wall thickness standards, and the surface utilizes a weather-resistant fluorocarbon coating process, offering UV resistance, corrosion resistance, and colorfastness, perfectly matching the architectural aesthetics of overseas high-rise office buildings, star-rated hotels, and high-end residences. While resembling ordinary high-end aluminum windows in appearance, the interior features a fully insulated and fire-resistant structure, maintaining Class A 1.5-hour fire resistance and heat insulation performance. Balancing architectural aesthetics with stringent fire safety compliance requirements, it is the top choice for overseas high-end commercial projects.
Unlike ordinary fire-resistant windows that only offer protection against open flames, its core advantage lies in "comprehensive fire prevention and temperature control." Many fire hazards in overseas projects do not originate from the direct spread of open flames, but rather from high-temperature heat radiation igniting surrounding materials. This product, relying on a professional insulation structure, blocks heat transfer at the source, sealing gaps where smoke and fire can penetrate and strictly controlling temperature spread, resulting in a fire safety level far exceeding conventional products. It also comes standard with fire-expanding fire-resistant sealing strips that automatically foam and seal gaps under high temperatures, preventing dense smoke and heat from penetrating the window frame.
The product is primarily used in areas with extremely high fire separation requirements, commonly found in the following scenarios:
Firewalls and fire-resistant partitions
Installed on partitions in special function rooms such as boiler rooms, transformer rooms, and equipment control rooms, where windows are necessary for lighting or observation.
Building Exterior Wall Openings
Openings located where the higher exterior wall of two adjacent buildings is a firewall, or within 15 meters or less above the roof of the adjacent lower building.
Atrium Connecting Spaces
Doors and windows connecting to the atrium should be Class A fire-resistant doors and windows that can automatically close in case of fire.
To meet the above stringent fire resistance standards, Class A insulated fire-resistant windows have strict specifications regarding material selection and structure:
Window Frames and Sashes
Typically made of high-quality cold-rolled galvanized steel sheet or Q235B steel. The wall thickness of the steel plate for the window frame of a Class A fire-resistant window is generally required to be ≥1.5mm, and the thickness of the steel plate for the window sash is ≥1.2mm. The internal cavity of the window frame is filled with cement mortar and then filled with non-combustible heat-insulating materials such as perlite fire-resistant core board and rock wool.
Fire-resistant Glass
Composite heat-insulating fire-resistant glass (such as grouted or laminated glass) must be used. This type of glass consists of multiple layers of float glass sandwiched with fire-retardant liquid or fire-retardant adhesive layers, with a total thickness typically around 30-35mm. When exposed to fire, the interlayer foams and expands to form a hard, milky-white, foam-like fireproof board, effectively blocking flames and high temperatures.
Sealing Accessories
Fire-expanding sealing strips (such as fire-expanding silicone rubber sealing strips) must be installed between the glass and the glazing bead, and around the window frame. These ensure airtightness at room temperature and expand upon heating during a fire to seal gaps and prevent smoke penetration.
In summary, Class A Insulated Fire-Resistant Windows are high-specification protective accessories in building fire protection systems. They transcend the limitations of basic fire protection, providing complete fire resistance integrity and professional thermal insulation capabilities to safeguard the fire safety of high-risk building areas. For high-standard and stringent overseas construction projects, choosing a Class A insulated window is not redundant, but rather provides a reliable core guarantee for project fire compliance and long-term safe operation, making it an indispensable high-quality product in high-end foreign trade fire protection systems.
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