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In overseas building fire protection projects, many procurement and engineering teams fall into a misconception: they believe that all fire-resistant windows need to be operable and equipped with automatic closing devices. However, in reality, most exterior wall openings for natural light and fire-resistant partitions do not require ventilation. Exterior Fixed Fire-Resistant Windows are a more suitable, reliable, and worry-free choice. They lack complex moving hardware structures, featuring a completely enclosed and fixed structure, specifically designed for fire separation and daily lighting on building exteriors. They are currently the most commonly used fire protection product in overseas factories, commercial buildings, and high-rise buildings.
Product Classification and Fire Resistance Rating
By Opening Method
Fixed (non-operable, no hardware/window closer); Operable (operable, requires temperature control/interlocking closing). Fixed windows are mostly used for exterior walls.
According to thermal insulation performance (GB 16809-2024)
Class A (thermal insulation): Integrity + thermal insulation, Class A ≥ 1.5h, Class B ≥ 1.0h, Class C ≥ 0.5h;
Class C (non-thermal insulation): Integrity only. Class C (single-layer fire-resistant glass) can be used for most exterior walls, but Class A is required if the lower floor has a high fire load, floor-to-ceiling windows, breathing curtain walls, or inadequate insulation.
Materials
Steel (most commonly used, galvanized steel frame + fire-resistant glass), aluminum alloy (exterior windows with a wall thickness ≥ 1.8mm), steel-wood/wood (less commonly used for exterior walls).
Core Installation Process
Opening Treatment and Positioning
Before installation, clean the surrounding dust and loose mortar, and repair any damage. Then, mark the horizontal and vertical control lines to ensure accurate window frame installation.
Window Frame Placement and Temporary Fixing
Place the window frame into the opening and align it with the control lines. Use wooden wedges for temporary fixing. At least two fixing points are required on each side, and the verticality should be checked using a spirit level to ensure horizontal and vertical alignment and consistent height (allowable deviation ≤2mm/m).
For export building projects, the core value of fire protection products is always compliance, stability, and durability. Exterior fixed fire-resistant windows eliminate unnecessary opening structures, focusing on core fire resistance, smoke isolation, and sealing performance. Their simple and reliable structure reduces potential malfunctions, lowers overall project costs, and reduces post-construction maintenance pressure. Whether for large-scale industrial projects or high-standard commercial exterior wall projects, it is a versatile, reliable, and high-quality fire protection product.
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