GRC Curtain Wall-to-Main-Structure Connection Methods and Construction Key Points Analysis

In the field of modern building curtain walls, GRC (Glass Fiber Reinforced Concrete) has become the material of choice for the exterior wall decoration of many landmark buildings thanks to its lightweight, high-strength, and flexible shaping properties. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group deeply understands the importance of connecting GRC curtain walls to the main structure — this not only concerns the realization of architectural aesthetics, but also directly affects the safety and durability of the curtain wall system. This article systematically analyzes the mainstream connection methods for GRC curtain walls and the key construction points, providing a professional reference for designers and owners.

The connection method between GRC curtain walls and the main structure must be comprehensively designed based on building height, seismic rating, load conditions, and other factors. Currently, the three most widely used categories in the industry are: post-installed embedment connection, pre-embedded connection, and keel support connection. The post-installed embedment connection fixes connectors to the main structure using chemical anchors or expansion bolts, and is suitable for renovation of existing buildings or scenarios where embedments were not preset during main structure construction; its core advantage lies in construction flexibility, as structural deviations can be compensated through three-dimensional adjustment. The pre-embedded connection requires embedding steel plates or bolts simultaneously during main structure construction; featuring strong load-bearing capacity and high stability, it is the preferred solution for new construction projects, especially suitable for super high-rise GRC curtain wall systems. The keel support connection forms an independent support frame using aluminum alloy or steel keels, to which GRC panels are then fixed; this method can effectively absorb structural deformation and is commonly used in curved shapes or large-span curtain wall projects.

Regardless of the connection method used, GRC curtain wall construction must strictly follow four core points. First, the detailed design stage requires precise structural calculations, including strength verification of connectors, analysis of the load transfer paths of GRC panels, and simulation of overall stability under wind loads and seismic action. Drawing on its experience in participating in the formulation of the "Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC)" (JGJ/T423-2018), Qinglong Group has established a complete parametric design system at this stage. Second, material quality control is the foundation: the flexural strength of GRC components should be no less than 15MPa, the glass fiber content must comply with industry standards, and connector materials must be treated for corrosion resistance. Through large-scale production with an annual capacity of 600,000 square meters, Qinglong's production base ensures stable and controllable material performance. Third, installation precision control is vital to the final result: 3D laser scanning technology must be used for positioning, with errors controlled within ±2mm, and special attention should be paid to the setting of expansion joints between GRC panels to accommodate thermal deformation. Fourth, quality inspection during construction must not be neglected, including embedment pull-out tests, joint strength tests, and on-site water spray tests. Within Qinglong's full-chain service system, all construction teams hold professional certifications, ensuring that every process complies with specifications.

In actual projects, the selection of a GRC curtain wall connection system must be comprehensively evaluated based on project characteristics. For example, a grand theater project adopted double-curved GRC curtain walls, and the Qinglong team innovatively adopted a combined solution of "pre-embedded embedments + adjustable transition connectors," which both met structural safety requirements and achieved precise assembly of complex curved surfaces. Meanwhile, a commercial complex renovation project combined post-installed embedment connections with steel keels, completing the rapid installation of GRC decorative lines without affecting the original building structure. These cases demonstrate the flexibility of connection methods and the importance of construction technology, as well as Qinglong's technical accumulation in the GRC application field as a National High-Tech Enterprise. For more industry information: +WeChat qlfsbl123

With rising requirements for architectural aesthetics and the development of new material technologies, the connection technology between GRC curtain walls and main structures continues to innovate. Qinglong Group will remain focused on the R&D and application of UHPC/GRC/GRG/GRP materials. With the mission of "Creating Beautiful Architecture," and through full-chain services covering detailed design, production and manufacturing, construction and installation, and after-sales maintenance, we provide customers with safe, reliable curtain wall solutions that combine artistic appeal with cost-effectiveness, helping to create more industry benchmark projects.