What Fire Rating Can GRC Curtain Walls Achieve?

The fire resistance performance of GRC curtain walls is an important indicator of building safety. Based on the national standard "Building Curtain Wall" (GB/T 21086) and extensive test data, Qinglong Group has confirmed that high-quality GRC curtain walls can achieve an A-class fire rating, with a fire resistance limit exceeding 1.5 hours, meeting the exterior wall fire protection requirements of most buildings.

GRC material itself is a Class A non-combustible material. Qinglong Group's products have passed testing by the National Center for Quality Supervision and Testing of Fire Building Materials, with combustion performance reaching Class A1. At high temperatures, GRC does not release toxic gases, and its strength degrades slowly. In the Wuhan Hanxiu Theater project, the GRC curtain wall system passed a 2-hour fire resistance limit test.

Fire performance of the system needs to be considered as a whole. Qinglong Group incorporates fire-stopping in curtain wall design to prevent flames from spreading between floors. Cavity areas are filled with fire-resistant rock wool to block heat conduction. Fire-resistant sealant is applied at panel joints to ensure the overall fire performance of the system. These measures enable GRC curtain wall systems to meet the requirements of the "Code for Fire Protection Design of Buildings".

Fire protection at special locations requires reinforced treatment. At junctions with floor slabs, Qinglong Group installs fire aprons and fire-stopping. For large-area curtain walls, fire compartments are rationally divided to control the risk of fire spread. Through systematic fire protection design, GRC curtain walls provide reliable fire protection for buildings.