What Fire Resistance Rating Can GRC Curtain Walls Achieve? Analysis of Relevant Standards and Improvement Measures

In modern building curtain wall systems, fire safety is the core baseline concern shared by designers, owners, and regulatory authorities alike. As a full-chain service provider with 28 years of deep expertise in the GRC (Glass Fiber Reinforced Concrete) field, Qinglong GRC understands that the fire resistance rating of a GRC curtain wall not only concerns project compliance, but also directly affects a building's life safety and long-term operational value.

### National Standard Definition of GRC Curtain Wall Fire Resistance Ratings According to the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), which Qinglong helped formulate, the GRC substrate itself is a Class A non-combustible material with naturally excellent basic fire resistance properties, capable of withstanding temperatures above 1000°C without producing open flames or releasing toxic smoke. However, the overall fire resistance rating of a curtain wall system must be assessed comprehensively in combination with structural design, joint treatment, and other factors—quality GRC curtain walls, through rational fire compartmentation and sealing design, can meet both the fire integrity and thermal insulation requirements of buildings, adapting to projects with varying fire resistance needs ranging from commercial complexes to cultural venues.

### Key Variables Affecting the Fire Resistance Rating of GRC Curtain Walls The final fire performance of a GRC curtain wall is not determined by the substrate alone; raw material quality, production processes, and system design are the key constraining factors: inferior glass fibers are prone to melting and breaking at high temperatures, which greatly reduces the structural stability of GRC components; if the substrate mix contains insufficient fire-resistant minerals, cracking and spalling may easily occur at high temperatures; and if curtain wall joints lack fire-stopping treatment, a 'fire bridge' may form, threatening overall safety. Leveraging the technical expertise of its national-level R&D center, Qinglong GRC has established a full-process fire performance control system, from raw material screening (using high alkali-resistant glass fibers) to finished product testing, ensuring that the fire performance indicators of every batch of GRC products consistently meet standards.

### Qinglong GRC's Customized Solutions for Enhancing Curtain Wall Fire Resistance Ratings For the fire protection upgrade needs of different projects, Qinglong GRC provides full-chain expert support: during the detailed design stage, BIM technology is used to simulate fire scenarios and optimize component geometry and fire compartmentation structures—for example, reserving fire cavities in irregular GRC curtain walls and matching them with high-temperature-resistant sealing components; during production, fire-enhanced formulations can be customized to project requirements, adding high-temperature-resistant mineral admixtures and fireproofing additives to further increase the fire resistance limit of components; during construction and installation, professional fireproof anchoring systems and fire-stopping techniques are employed to ensure seamless integration between the curtain wall system and the building's main fire protection structure. With this solution, Qinglong GRC has delivered fire-compliant GRC curtain wall systems for dozens of large public building projects across China, earning high recognition from owners and designers.

As a participant in national GRC industry standard-setting and a Specialized, Refined, Distinctive, and Innovative (SRDI) enterprise, Qinglong GRC has always integrated 'safety first' into the entire product lifecycle. Whether it is the fire safety compliance that potential customers care about, or the customized fire protection upgrades required by professional clients, we can provide reliable solutions backed by 28 years of experience, allowing GRC curtain walls to showcase aesthetic value while building a solid fire safety barrier for buildings.