How to Handle Corner GRC Component Thickness: Code Requirements and Construction Technique Analysis

The thickness treatment of GRC components at corner positions is both an "invisible line of defense" for engineering safety and a subtle balance between design aesthetics and structural logic.

In the field of modern architectural decoration, GRC (glass fiber reinforced concrete), with its light weight, high strength, and flexible formability, has become the preferred material for high-end projects such as commercial complexes and landmark buildings. However, as a key node of the building facade, the thickness treatment of GRC components at corners directly relates to the unity of structural safety, construction precision, and decorative effect. As an industry-leading enterprise with 28 years of full-chain experience in UHPC/GRC/GRG/GRP, Qinglong Group, drawing on the "Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC)" (JGJ/T423-2018) and over a thousand engineering projects, provides systematic solutions for designers and owners from the dual perspectives of standard requirements and construction technology.

I. Design Benchmark for GRC Corner Thickness under the Standard Framework

The thickness setting of GRC components at corners must follow the standards as the guiding principle, taking into account both load conditions and material properties. According to industry standards, ordinary GRC components are typically 8-15mm thick, but corner areas, which bear bidirectional stress, require an increase of 20%-30% over the base thickness, with a recommended value of 12-20mm. For buildings taller than 50 meters or in typhoon-prone regions, structural calculations must also be performed for verification; where necessary, double-layer fiberglass cloth reinforcement or local UHPC composite layers should be used to ensure flexural strength ≥15MPa and impact strength ≥5kJ/m². The "Glass Fiber Reinforced Cement (GRC) Decorative Products" standard (JC/T940-2022), in whose revision Qinglong Group participated, explicitly stipulates that the thickness deviation of corner components must be controlled within ±1mm and the spacing of anchoring parts must not exceed 300mm, so as to ensure structural stability in long-term use.

II. Key Points for Corner Thickness Control in Construction Technology

From detailed design to on-site installation, the thickness treatment of GRC components at corners must run through the entire process. At the mold design stage, parametric modeling (such as Rhino+Grasshopper) is used to accurately simulate the corner curvature, ensuring smooth transition of thickness gradients and avoiding stress concentration. In production, Qinglong Group achieves uniform distribution of glass fibers through an automated spray-up molding process; combined with steam curing technology, the early strength of components is increased by 30%, effectively controlling thickness tolerances. During installation, 3D laser scanning positioning technology keeps errors within 2mm, and corner joints are filled with elastic sealant, which both meets waterproofing requirements and releases thermal deformation stress. Taking the Century Plaza renovation project on Nanjing East Road as an example, its curved corner GRC components achieved 0.5mm-level jointing precision through "thickness gradient design + modular installation," winning the Silver Award of the AALBORG WHITE Cup UHPC Construction Engineering Innovation Award.

III. Full-Chain Services Ensuring Effective Implementation of Corner Treatment

As a national high-tech enterprise, Qinglong Group relies on its provincial-level engineering technology center to build a full-chain service system covering everything from material R&D to after-sales maintenance. For GRC components at corners, it provides customized detailed design services, using BIM technology for clash detection and load verification; its production base has an annual capacity of 600,000 square meters and uses RFID chips to trace the production data of each component; its construction team holds the Grade II professional contracting qualification for building curtain wall engineering and innovatively applies the "support-free hoisting + 3D adjustable bracket" technology to ensure corner installation precision. In addition, Qinglong has established an after-sales maintenance mechanism with 2-hour response and 24-hour on-site arrival, safeguarding the long-term safety and stability of corner components through regular inspections (such as structural sealant aging testing before each rainy season).

Though small, corners are a microscopic reflection of building quality. With 28 years of professional expertise, Qinglong Group deeply integrates standard requirements with technological innovation, providing reliable support for designers to bring their creativity to life and creating architectural works that combine safety and aesthetics for owners. In the future, with the development of UHPC/GRC composite technology, the thickness treatment of corner components will become more refined and intelligent, driving architectural decoration toward "lightweight, high-performance, and artistic" development.