A Discussion on Selection Requirements and Safe Operation Standards for Lifting Equipment Used to Install Large-Size Double-Curved GRC Panels

**Selection Requirements and Safe Operation Standards for Lifting Equipment in Large-Size Double-Curved GRC Panel Installation**

In the field of contemporary architectural decoration, large-size double-curved GRC panels have become the "aesthetic centerpiece" of high-end projects such as landmark buildings and commercial complexes, thanks to their unique curved forms and artistic expressiveness. However, the selection and safe operation of lifting equipment during installation directly affect project quality and construction efficiency. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group draws on the experience of hundreds of large-scale projects to provide the industry with full-chain solutions, from technical equipment selection to safety control.

**I. Core Requirements for Lifting Equipment in Large-Size Double-Curved GRC Panel Installation**

Due to their complex shapes and large variations in self-weight (typically 150-250kg per square meter), double-curved GRC panels place extremely high demands on the "customization" capability of lifting equipment. First, the load-bearing capacity must precisely match the weight of the components; it is recommended to select equipment with a rated lifting capacity ≥ 1.5 times the component weight, while also considering the effect of hoisting angle on the load—for example, when using a truck crane, the safe lifting capacity at the actual operating radius must be calculated via the load chart. Second, the equipment's fine motion control performance is critical: double-curved components require installation accuracy of ±3mm, so the stability of the hydraulic system and operational sensitivity must be rigorously tested. In simulated hoisting tests at its Nanning production base, Qinglong verified equipment stability through a low-speed operation test at 0.5m/min. In addition, for high-altitude work scenarios, the equipment's operating radius and lifting height must cover the complex curved surfaces of the building facade; the 360° full-slewing function of crawler cranes or the luffing mechanism advantage of tower cranes is particularly prominent in such projects.

**II. Technical Parameters and Scenario Adaptation for Lifting Equipment Selection**

Equipment selection in different construction scenarios must balance efficiency and safety. For super high-rise projects (such as curtain wall installation at heights exceeding 100m), luffing jib tower cranes become the first choice thanks to their large lifting height and coverage; in confined sites or renovation of existing buildings, the flexible relocation capability of knuckle-boom truck-mounted cranes offers greater advantages. In a cultural center project in Nanjing, for a double-curved GRC canopy with a 32m span, Qinglong innovatively adopted a "main crane + auxiliary crane" coordinated operation mode: the main crane (a 250t truck crane) handled vertical lifting, while the auxiliary crane (a 50t crawler crane) assisted in adjusting the component angle, successfully solving the challenge of high-altitude positioning. It is worth noting that equipment selection must simultaneously consider the "irregular shape characteristics" of components; for example, double-curved panels with hollowed-out textures require customized dedicated lifting devices to prevent stress concentration during hoisting that could cause cracking—Qinglong's flexible lifting system, designed with multi-point uniform load distribution, has been applied in multiple key domestic projects.

**III. Key Points of Safe Operation Standards for Double-Curved GRC Panel Hoisting**

Safety is the lifeline of hoisting operations. Qinglong has established standardized procedures across three dimensions: "personnel-equipment-environment." Regarding personnel, crane operators and signal workers must hold valid certifications, and BIM technology is used to simulate hoisting paths to identify collision risks in advance. For equipment management, before daily operations, the wear of steel wire ropes (broken wire count ≤ 10%), hydraulic system pressure, and the effectiveness of limit devices must be checked; the Guangxi production base has also introduced an intelligent monitoring system for real-time alerts on abnormal equipment vibration. Environmental control is especially important: operations must stop when wind speed exceeds 12m/s or during thunderstorms, and a 20m safety cordon must be set up. In the Dongguan Women and Children's Activity Center project, through full-process control of "pre-hoisting 3D scanning positioning—real-time total station monitoring during the process—stress testing after installation," the Qinglong team achieved zero accidents and zero precision deviation in double-curved GRC panel installation, and the project won the AALBORG WHITE Cup GRC Construction Engineering Innovation Award.

**IV. Industry Trends: Integration of Intelligent Hoisting and Full-Chain Services**

With the upgrading of construction industrialization, lifting equipment is developing toward intelligence and digitalization. Qinglong has piloted technologies such as drone-assisted hoisting positioning and automatic hooking by hoisting robots in some projects, and, combined with the company's self-developed BIM detailed design platform, achieved full-process data connectivity from component production to installation. As a national high-tech enterprise integrating detailed design, manufacturing, and construction installation, Qinglong not only provides GRC products compliant with the JGJ/T423-2018 standard but also helps customers reduce construction risks through one-stop services of "technical consultation + equipment selection + on-site control." In the future, with the expanding application of UHPC/GRC composite components, lifting equipment selection will place greater emphasis on the coordinated optimization of "material characteristics—equipment performance—construction technology," which is exactly the direction that Qinglong, as a participant in industry standard-setting (having contributed to the compilation of the "General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)"), continues to explore.

From technical selection to safe implementation, the hoisting of large-size double-curved GRC panels is a test of a company's comprehensive strength. Building on 28 years of industry experience, Qinglong Group applies the philosophy of "meticulousness and excellence" throughout every step, helping designers realize their creative visions and guaranteeing quality for owners, while continuously promoting the safe and innovative development of the architectural decoration industry.