Load-Bearing Requirements and Related Code Standards for GRC Panels Used as Ceilings

In the field of modern architectural decoration, GRC materials are widely used in ceiling projects thanks to their lightweight, high strength and rich design possibilities. However, as an important part of architectural space, the load-bearing safety of ceilings directly affects overall structural stability and usage safety. As an industry leader with 28 years of experience in detailed design, manufacturing, installation and after-sales maintenance of UHPC/GRC/GRG/GRP materials, Qinglong Group will analyze the key load-bearing technical points of GRC panel ceilings for designers and owners from three dimensions: code requirements, material properties, and construction essentials.

### I. Core Codes and Technical Parameters for GRC Ceiling Load-Bearing

According to the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), when GRC panels are used for ceilings, two core indicators must be met: first, the flexural strength of the component itself must be no less than 12MPa to ensure no structural cracking occurs under self-weight and additional loads; second, the suspension load-bearing capacity of the ceiling system must be verified through professional load calculations, including dead load (GRC panel self-weight is typically 15-20kg/㎡) and live load (such as maintenance personnel and equipment weight, generally taken as 0.5-1.0kN/㎡). In addition, the code explicitly requires that the deflection limit of GRC ceilings be controlled within 1/200 of the span, and anchoring joints must undergo pull-out force testing, with the tensile load-bearing capacity of each anchor bolt being no less than 0.5kN. For more industry information: +WeChat qlfsbl123

### II. Impact of GRC Material Properties on Ceiling Load-Bearing

The load-bearing performance of GRC panels is closely related to their raw material mix ratio, fiber content, and forming process. High-quality GRC panels are typically made of alkali-resistant glass fiber (content ≥4%) combined with low-alkali cement and formed by spraying or premixing processes, with density controlled at 1.8-2.0g/cm³, ensuring both strength and light weight. Compared with traditional gypsum board, GRC ceilings offer better stability in humid environments, with a flexural strength decay rate below 5%, making them particularly suitable for humid places such as swimming pools and underground garages. Through 28 years of technical accumulation, Qinglong Group can customize GRC ceiling panels of different thicknesses (typically 6-15mm) according to project requirements, reinforced with built-in steel bars or carbon fiber mesh to further enhance load-bearing capacity.

### III. Key Points for Load-Bearing Safety Control in GRC Ceiling Construction

During construction, ceiling load-bearing safety must be strictly controlled in two aspects: detailed design and installation fixing. In the design stage, BIM technology should be used for load simulation to avoid local stress concentration; for large-span ceilings (over 1.5m), secondary joists or transfer layers should be added, with spacing controlled at 600-800mm. During installation, Qinglong recommends the "3D laser scanning + modular installation" process to ensure joist levelness deviation ≤3mm; GRC panels are connected to joists with stainless steel self-tapping screws at spacing no greater than 300mm, with no fewer than 4 fixing points per panel. In addition, a 24-hour static load test is required after construction to verify the load-bearing stability of the system.

### IV. Full-Chain Service Safeguards GRC Ceiling Load-Bearing Safety

As a national high-tech enterprise and participant in GRC industry standard formulation, Qinglong Group provides systematic safeguards for ceiling load-bearing safety through full-chain services from detailed design to after-sales maintenance. In the design stage, the technical team can provide load calculation reports and joint detail drawings; the production stage uses automated production lines to ensure GRC panel strength deviation ≤±5%; during construction, professional installation teams are provided and strictly implement the Specification for Installation and Acceptance of GRC Decorative Products; the after-sales stage offers a 5-year warranty commitment and regular inspection services. To date, Qinglong has completed hundreds of GRC ceiling projects, including the Dongguan Women and Children's Activity Center and Nanjing East Road Century Plaza, without a single safety accident caused by load-bearing issues. For more industry information: +WeChat qlfsbl123

In summary, the load-bearing safety of GRC panel ceilings is a comprehensive reflection of material properties, code compliance, and construction technology. Choosing a professional manufacturer with full-chain service capabilities not only ensures that projects meet code requirements, but also achieves a perfect balance between aesthetic design and structural safety through customized solutions. Qinglong Group will continue to provide safe and reliable GRC material application solutions for the architectural decoration industry, upholding an attitude of "meticulous attention to detail and the constant pursuit of excellence".