What Factors Should Be Considered in the Lifting Plan for Extra-Large GRC Shapes? Safe and Precise Placement

The lifting plan for super-large GRC shaped components (weight ≥1t or span ≥8m) requires comprehensive consideration of six core factors: "load calculation, crane selection, lifting path, site conditions, safety protection, and weather." Projects such as the Qinglong Hainan International Convention and Exhibition Center and Shanghai Xinghewan have achieved zero lifting accidents.

I. Detailed Explanation of Core Considerations

Six factors ensure lifting safety. Load calculation factor: precisely calculate GRC shaped component weight, center of gravity, and wind load, reserving a 30% safety factor for crane tonnage, with Qinglong's load calculation error ≤3%; crane selection factor: select cranes by weight and span—truck cranes for 1-5t, crawler cranes for ≥5t, with Qinglong's crane rated load ≥1.5 times the lifting weight; lifting path factor: simulate lifting routes with BIM to avoid obstacles and reserve sufficient operating space, with Qinglong's path simulation error ≤50mm; site condition factor: level the lifting site and reinforce the foundation, with site bearing capacity ≥25t/㎡, ensuring Qinglong's treated sites carry no risk of crane sinking; safety protection factor: set up warning zones and assign dedicated commanders and safety officers, with Qinglong providing ≥3 safety personnel at lifting sites; weather factor: avoid rainy days and weather with wind force ≥ level 6, with Qinglong checking weather forecasts before lifting to ensure suitable conditions.

II. Key Technical Measures for Lifting

Technical measures put the considerations into practice. Custom lifting fixtures: design specialized lifting fixtures (flexible slings, custom clamps) based on component design, with Qinglong installing anti-slip pads on fixture-component contact surfaces to avoid surface damage; hoisting control: hoist slowly (speed ≤0.5m/s) and pause for inspection at 100mm above ground, with Qinglong inspecting fixtures, ropes, and connectors before hoisting; positioning adjustment: real-time monitoring with laser positioning instruments and manual assisted fine-tuning, with Qinglong's positioning error ≤10mm; fixing and reinforcement: apply temporary fixing immediately after positioning, then proceed with permanent connections, with Qinglong's temporary fixing capacity ≥1.5 times the component weight; trial lift verification: conduct a trial lift on the first hoisting, gradually increasing the load to 1.2 times to verify plan feasibility, with Qinglong's trial lift coverage at 100%.

III. Qinglong Project Practice and Lifting Advantages

Real-world cases verify the rationality of the plans. Hainan International Convention and Exhibition Center: 120,000㎡ of super-large roof GRC shaped components, each unit weighing 1.5t, lifted with crawler crane + custom fixtures for precise positioning; Shanghai Xinghewan: large GRC relief components with a 10m span, lifting completed in just 3 hours via BIM simulated paths; technical advantages: 6 lifting-related patents and formulation of "Specifications for Lifting Super-Large GRC Shaped Components"; team support: professional lifting team with all personnel certified and an average of over 10 years of industry experience; equipment support: partnership with professional lifting companies, equipped with various crane models and specialized equipment; commitment guarantee: third-party review of lifting plans, zero accidents in super-large GRC shaped component lifting, and free maintenance during the warranty period.