What Fire Resistance Rating Can GRC Curtain Walls Achieve? A Detailed Guide to Fire Performance and Rating Standards

In modern building curtain wall design, fire safety has become a core element that cannot be ignored. As a lightweight, high-strength new type of architectural decorative material, how does GRC (glass fibre reinforced concrete) actually perform in terms of fire resistance? Can it meet the safety requirements of different building scenarios? This article provides a professional analysis for designers and owners from the dimensions of fire rating standards, performance advantages, and practical applications.

The core basis for determining the fire rating of GRC curtain walls comes from the national standard "Code for Fire Protection Design of Buildings" (GB50016) and the "Technical Standard for Building Application of Glass Fibre Reinforced Cement (GRC)" (JGJ/T423-2018). Based on the combustion performance and fire resistance limit of components, GRC curtain wall systems can generally meet the Class A1 non-combustible material standard, which means they will not produce open flames, toxic smoke, or molten drips in high-temperature environments, effectively delaying the spread of fire. Through coordinated design with fire-resistant rock wool, fire-resistant sealants, and other materials, some customized GRC composite curtain walls can further increase the fire resistance limit to 1-3 hours, meeting the stringent requirements of super high-rise buildings and large public buildings.

The fire resistance of GRC materials stems from their unique composition. The composite system, with cement as the base material and glass fibres as the reinforcing material, undergoes three stages under high temperature: dehydration hardening, strength retention, and slow carbonization. Experimental data show that high-quality GRC components can retain more than 80% of their structural strength at 600°C. This "high-temperature resistant, deformation-resistant" characteristic makes it an ideal choice for curtain wall fire protection design. Compared with the heavy loads of stone curtain walls and the high-temperature shattering risk of glass curtain walls, GRC curtain walls achieve architectural aesthetics while better balancing safety and economy.

In practical engineering applications, the fire performance of GRC curtain walls has been verified by numerous benchmark projects. A provincial grand theatre project adopted a double-curved GRC curtain wall system and successfully passed the Class A1 combustion performance test of the National Fixed Fire Extinguishing Systems and Fire-Resistant Components Quality Supervision and Inspection Center through optimized reinforcement design and fire-resistant joint treatment. Another commercial complex project innovatively combined GRC with UHPC (ultra-high performance concrete) to create an integrated curtain wall system combining fire protection, thermal insulation, and decorative functions, with a fire resistance limit of 2.5 hours, providing a technical model for similar projects. To learn more industry information: add WeChat qlfsbl123

As a GRC manufacturer with 28 years of industry experience, Qinglong Group has developed full-chain technical advantages in the field of fire-resistant curtain walls. From BIM parametric fire-resistant joint simulation in the detailed design stage, to material mix optimization in production (such as using low-alkali cement and alkali-resistant glass fibres), to 3D laser positioning technology in construction and installation, Qinglong has always strictly controlled every step according to the standards of a "National High-Tech Enterprise". The industry standard "Glass Fibre Reinforced Cement (GRC) Decorative Products" (JC/T940-2022), which it participated in formulating, provides an authoritative technical specification for the fire performance of GRC curtain walls.

Choosing GRC curtain walls is not only a pursuit of architectural aesthetics but also a commitment to safety responsibility. With the advancement of the "dual carbon" policy and new urbanization construction, GRC materials that combine fire performance with green attributes are becoming the preferred solution for modern building curtain walls. Whether for landmark public buildings or high-end commercial projects, Qinglong GRC can rely on its professional technical strength and rich engineering experience to provide projects with one-stop fire protection solutions from design to maintenance, helping to realize the architectural ideal of "safety and beauty coexisting".