How to Achieve Demountable Connections for GRC Curtain Walls?

Achieving demountable connections for GRC curtain walls requires four core approaches: modular design, selection of demountable anchor brackets, standardized joint construction, and reserved maintenance space. Through technological innovation, Qinglong has developed a demountable connection system featuring “easy installation, flexible disassembly, and reuse,” achieving a 100% success rate of demountable connections across multiple projects and a 60% improvement in later-stage operation, maintenance, and replacement efficiency.

1. Modular Design: Laying the Foundation for Demountability

Modular design allows components to be independently disassembled and assembled without affecting the overall structure. Component splitting: large curtain wall areas are split into independent modules, with each module ≤3m×3m in size and ≤300kg in weight, facilitating disassembly by manual labor or small equipment; Qinglong's modular splitting error is ≤±2mm, ensuring high assembly precision; Universal interfaces: modules adopt a universal interface design with standardized interface dimensions (e.g., unified bracket spacing and bolt hole diameters); Qinglong's universal interface adaptation rate reaches 95%, allowing components from different batches to be interchangeable; Avoiding irreversible connections: irreversible connection methods such as welding and embedded connections are prohibited, with preference given to detachable connections such as bolts and snap-fits; irreversible connections account for 0% in Qinglong's demountable projects.

2. Selecting Demountable Anchor Brackets and Standardized Joints

Anchor brackets and joints are the core components of demountable connections. Demountable anchor brackets: stainless steel bolt brackets and snap-fit brackets are selected; each bracket consists of a fixed end (main structure) and a movable end (GRC component), and disassembly only requires loosening the bolts or snap-fits; Qinglong's stainless steel bolt brackets offer excellent corrosion resistance and can withstand more than 50 disassembly cycles; Standardized joints: joint construction follows the “one-disassembly-one-installation” principle, with no concealed connectors, and bracket positions are exposed or have reserved maintenance openings; Qinglong's joint designs have undergone multiple disassembly tests, with disassembly time ≤30 minutes per panel; Anti-loosening measures: bracket bolts are equipped with anti-loosening nuts and flat washers to prevent loosening during long-term use; Qinglong's anti-loosening nuts are of the nylon lock-in type, providing anti-loosening performance for more than 10 years.

3. Reserved Maintenance Space and Construction Specifications

Space reservation and standardized construction ensure the feasibility of demountability. Reserved maintenance space: a 50–100mm maintenance space is reserved between modules to facilitate tool operation and component removal; Qinglong's maintenance space design accommodates the dimensions of common tools, improving operational flexibility by 40%; Construction sequence: installation follows a “bottom-to-top, left-to-right” order, with disassembly in the reverse order to avoid earlier-installed components blocking later ones; Qinglong's construction sequence has been verified through BIM simulation with no disassembly conflicts; Identification and records: each module is marked with a unique number, and an installation position record is established, enabling quick location during disassembly; Qinglong's module numbering matches its records at 100%, making later replacement precise and efficient; Project case: the GRC curtain wall of the National Service Center in Singapore adopted Qinglong's demountable connection solution, with later component replacement taking only 2 hours per panel without affecting surrounding modules.