The Role and Key Design Points of Load Pockets in GRC Components

In the field of modern architectural decoration, GRC components, with their lightweight high-strength properties and rich shapes, have become key materials for shaping architectural aesthetics and functionality. The load-bearing package, as the “invisible skeleton” within GRC components, has its design rationality directly determining the safety and durability of the components. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group will, starting from engineering practice, analyze the core role of the load-bearing package in GRC components and the key points of its scientific design, providing professional solutions for designers and owners.

I. Load-Bearing Package: The Structural Safety Core of GRC Components

GRC components (Glass Fiber Reinforced Concrete) achieve a balance between material strength and design freedom through the composite of glass fibers and cement-based matrix, while the load-bearing package, as the load transfer hub inside the component, performs three key functions. First is load transfer: evenly distributing external forces such as the component's dead weight and wind loads to the installation nodes, preventing cracking caused by local stress concentration; second is shape stability: especially in complex shapes such as double-curved surfaces and large cantilevers, the load-bearing package, through the synergy of the steel frame and fiber mesh, ensures the component does not deform during long-term use; and finally connection safety: its anchoring design with embedded parts directly relates to the seismic and wind resistance performance of high-altitude installation. Taking a landmark project Qinglong participated in as an example, by optimizing the load-bearing package structure, the dead weight of a 12-meter-long GRC decorative cornice was successfully reduced by 30%, while the flexural strength was increased to 22MPa, far exceeding industry standards.

II. Four Key Design Points for GRC Load-Bearing Packages

1. Material compatibility design: The steel frame of the load-bearing package needs to form a “coordinated load-bearing system” with the GRC matrix. In detailed design, Qinglong strictly controls the matching ratio between rebar diameter (usually φ8-φ12 deformed steel bars) and fiber content (glass fiber content ≥5%), using BIM technology to simulate stress distribution under different loads to ensure coordinated deformation between the frame and the matrix. For example, in European classical moldings, the load-bearing package adopts a “main and secondary bars + circular stirrups” structure, which both meets the carved modeling requirements and ensures the flexural capacity at the root of cornice lines.

2. Node anchoring reinforcement: The connection nodes between the load-bearing package and the building structure are weak points for safety. Qinglong's proprietary “three-dimensional adjustable embedded part” technology achieves a flexible connection between the load-bearing package and structural walls through stainless steel connectors, allowing ±15mm installation tolerance adjustment, while epoxy resin grouting is used to enhance anchoring force. In a commercial complex project in Nanjing, this technology enabled the GRC curtain wall panels to achieve wind pressure resistance of 1.5kPa, meeting the requirements for use in typhoon-prone areas.

3. Balancing lightweighting and strength: Load-bearing package design needs to find the optimal solution between weight reduction and load bearing. Using topology optimization algorithms, Qinglong adopts hollow-out frame designs in non-critical load-bearing areas, combined with local reinforcement of UHPC (Ultra-High Performance Concrete), reducing component dead weight by 25% while increasing load capacity by 40%. For example, the GRC sunshades at an exhibition center in Nanning achieved an ultra-thin design (only 50mm thick) over a 3.6-meter span through a honeycomb load-bearing package structure.

4. Weather-resistance detail treatment: The rust and corrosion prevention of the load-bearing package directly affects component lifespan. Qinglong adopts a dual protection system of hot-dip galvanized steel frame + inorganic zinc-rich coating, verified by accelerated aging tests to ensure 50 years without rust in humid, salt-spray environments. Meanwhile, an elastic buffer layer is set at the junction between the load-bearing package and the matrix to prevent cracking caused by thermal deformation.

III. Full-Chain Assurance: Load-Bearing Package Quality Control from Design to Maintenance

As a national high-tech enterprise integrating detailed design, manufacturing, and construction installation, Qinglong has established a whole life-cycle quality management system for load-bearing packages. In the design phase, relying on the material laboratory of the provincial R&D center, load-bearing packages undergo finite element analysis and physical performance testing; in production, automated welding robots are used to ensure frame precision, with RFID chips enabling quality traceability; during construction, 3D laser scanning positioning ensures load-bearing package installation errors ≤3mm. To date, Qinglong has provided GRC component solutions for thousands of domestic projects; among them, the Dongguan Women and Children's Activity Center project won the Silver Award of the first GRC Construction Engineering Innovation Award for its innovative load-bearing package design.

Although hidden inside GRC components, the load-bearing package is a core element determining building safety and the realization of aesthetics. With 28 years of technical accumulation, Qinglong Group deeply integrates structural mechanics with materials science, and through refined design and full-process control, enables GRC components in grand theaters, commercial complexes, landmark buildings, and other settings to display artistic beauty while building a solid foundation of safety. In the future, Qinglong will continue to promote load-bearing package technological innovation, providing more reliable and efficient solutions for the architectural decoration industry.