UHPC Curtain Wall Panel Fire Rating Analysis: Can It Meet Class A Fire Standard?

Fire performance is a core safety indicator for building curtain walls, especially for public and high-rise buildings, where fire rating requirements are more stringent. As an ultra-high performance concrete material, the fire rating of UHPC curtain wall panels has drawn considerable attention. Drawing on 28 years of industry experience and material property analysis, Qinglong Group provides a detailed explanation of its fire performance and the path to achieving Class A compliance.

I. Core Requirements of the Class A Fire Standard According to the "Classification of Burning Behavior of Building Materials and Products", Class A fire-rated materials refer to non-combustible materials, which must meet the following requirements: no combustibility, no open flame generation, no release of toxic gases at high temperatures, and a fire resistance limit that complies with project design requirements. Using Class A fire-rated materials in building curtain walls can effectively prevent fire spread and buy time for evacuation and firefighting rescue, and is a mandatory requirement for high-rise and public buildings.

II. Natural Fire Advantages of UHPC Curtain Wall Panels and Reinforcement Measures UHPC material inherently possesses natural fire-resistant properties. Its main components are cement, aggregates, and steel fibers—all inorganic non-combustible materials—giving it a base fire rating of Class A1 (non-combustible material). However, to meet the overall fire requirements of the curtain wall system, targeted reinforcement is needed: First, optimizing panel thickness—standard UHPC panels over 30mm can achieve a fire resistance limit of more than 1.5 hours. Second, fireproofing treatment at joints—the connection points between hangers and keels are filled with fire-stopping materials to prevent fire gaps from forming. Third, coordination with other materials—in the Wuhan Han Show Theatre project, Qinglong combined UHPC curtain walls with fireproof rock wool to form a composite fire protection system, enhancing overall fire performance.

III. Qinglong's Fire Engineering Practice and Certification for UHPC Curtain Wall Panels As a National High-Tech Enterprise, Qinglong's UHPC curtain wall panels have been tested by authoritative institutions, with fire ratings all reaching Class A standards and a fire resistance limit of up to 2.5 hours. In public building projects such as the Shanghai Astronomy Museum and the Shenzhen Pingshan High-tech Zone Comprehensive Service Center, Qinglong's UHPC curtain wall panels passed strict fire acceptance inspections, meeting the safety requirements of high-rise and public buildings. In addition, Qinglong participated in drafting the industry standard "Ultra-High Performance Concrete (UHPC) Exterior Wall Panels", which specifies the fire performance indicators and testing methods for UHPC curtain wall panels. During production, Qinglong strictly controls material ratios to ensure no organic additives, safeguarding fire performance at the source, while also providing complete fire test reports and certification documents.

With their inorganic non-combustible material properties, UHPC curtain wall panels can fully meet Class A fire standards through scientific design and treatment. Leveraging 28 years of engineering experience and technical strength, Qinglong Group provides buildings with Class A fire-rated UHPC curtain wall solutions that combine decorative effect with safety performance. Choosing a supplier with fire certification and engineering experience is key to ensuring building fire safety.