How to Handle the Thickness of GRC Components at Corner Positions: Key Techniques and Construction Points Explained

In the field of architectural decoration, GRC components, with advantages such as lightweight high strength and flexible shaping, are widely used in exterior facades, decorative lines, and other parts of various buildings. As a special joint in building structures, the thickness treatment of GRC components at corner positions directly affects the safety, aesthetics, and durability of the entire building. Qinglong Group, with 28 years of experience in detailed design, manufacturing, construction and installation, and after-sales maintenance of UHPC/GRC/GRG/GRP materials, will explain the key technologies and construction points of thickness treatment for GRC components at corner positions from the aspects of technical principles, design essentials, and construction techniques.

### I. Core Principles of Thickness Design for GRC Components at Corner Positions

The thickness design of GRC components at corner positions must take into account three core elements: structural load-bearing, material properties, and architectural aesthetics. From a structural perspective, the corner position is a stress concentration area, and components must have sufficient flexural and shear strength. The base thickness is generally recommended to be no less than 80mm, with specific values determined through structural calculations based on parameters such as building height, wind pressure load, and seismic grade. As a national-level high-tech enterprise, Qinglong Group relies on the technical strength of its provincial-level R&D center and can use BIM technology and finite element analysis software to accurately simulate the stress state of corner positions under different working conditions, providing a scientific basis for thickness design.

In terms of material properties, GRC material is composed of glass fiber and cement-based composite materials, and its thickness must meet the requirement for uniform distribution of glass fibers, avoiding insufficient fiber content caused by excessive local thinness, which would affect overall strength. Meanwhile, thickness design must also consider the self-weight of components, achieving lightweight design while ensuring strength, to reduce the load on the main building structure. Qinglong GRC components are produced on automated production lines with strict control of material proportions and molding processes, ensuring thickness uniformity error does not exceed ±3mm, laying a foundation for subsequent installation.

### II. Key Technologies for Thickness Treatment of GRC Components at Corner Positions

1. **Gradient Transition Technology**: For internal and external corners or concave and convex corners, adopting a gradient thickness design can reduce stress concentration. For example, at external corners, component thickness can gradually decrease from the core area toward the edges, with a transition section length of no less than 150mm, which ensures structural strength while avoiding cracking risks caused by rigid right-angle connections. In the renovation project of Century Plaza on Nanjing East Road, Qinglong Group successfully achieved seamless connection of translucent concrete corner components using this technology, winning the Silver Award of the First UHPC Construction Engineering Innovation Award of the AALBORG WHITE Cup.

2. **Stiffening Rib Design**: When corner components have large spans or high loads, stiffening ribs can be added to the inner side of the component. The thickness of stiffening ribs should be 1.2-1.5 times the thickness of the main component, with the width determined by load-bearing requirements, usually no less than 100mm. The stiffening ribs of Qinglong GRC components use an integrated molding process, bonded tightly with the main structure, effectively improving the overall stiffness of components. This technology was fully applied in the Dongguan Women and Children's Activity Center project and won the Silver Award of the GRC Construction Engineering Innovation Award.

3. **Composite Construction Technology**: For special requirements such as thermal insulation and fire protection, GRC components at corner positions can adopt composite construction, consisting of a structural layer, insulation layer, and finish layer. The thickness of the structural layer must meet load-bearing requirements, the insulation layer thickness is determined according to energy-saving standards, and the finish layer ensures the visual effect. As a participating drafting unit of the industry standard "General Technical Conditions for Ultra-High Performance Concrete (UHPC) Non-Load-Bearing Components", Qinglong Group has accumulated rich experience in composite construction technology and can provide customized solutions according to project requirements.

### III. Key Points for Construction and Installation of GRC Components at Corner Positions

1. **Precise Positioning and Measurement**: Before construction, 3D laser scanning technology should be used to accurately measure corner positions and obtain actual dimensional data for comparison with the design model. If deviations exist, detailed adjustments should be made promptly. Qinglong Group holds a Grade II professional contracting qualification for building curtain wall engineering, and its construction team is equipped with advanced measurement equipment to ensure component installation positioning errors are controlled within ±2mm.

2. **Anchoring System Installation**: Anchoring points of GRC components at corner positions should be set in areas with greater thickness or at stiffening rib locations. The number of anchors must be determined through calculation based on component weight and load conditions, and the load-bearing capacity of each anchoring point must be verified through on-site pull-out tests. Qinglong GRC components use stainless steel anchors with excellent corrosion resistance, suitable for various environmental conditions.

3. **Joint Treatment**: Joints of corner components should be filled with elastic sealing materials to avoid cracking caused by temperature changes or structural settlement. Joint width should be controlled at 5-10mm, and sealing materials should be products with good compatibility with GRC materials and strong weather resistance. Qinglong Group provides comprehensive after-sales maintenance services, regularly inspecting and maintaining joints at key locations such as corners to ensure the long-term aesthetic appearance of buildings.

Thickness treatment of GRC components at corner positions is a systematic project requiring full-chain collaboration from design to production to construction. As an industry leader in the field of UHPC/GRC/GRG/GRP materials, Qinglong Group has always adhered to the principle of "meticulousness and excellence", leveraging 28 years of technical accumulation and full-chain service capabilities to provide professional solutions for designers and owners. Whether for high-end public buildings such as grand theaters and commercial complexes, or real estate and municipal projects, Qinglong GRC components, with outstanding quality and performance, help buildings achieve the perfect unity of aesthetics and function.