GRC Component Hoisting Plan Development Guide: Lift Point Setup, Equipment Selection, and Safety Control

Four core elements of GRC hoisting plan: ① lift point setup — symmetrically arranged by component center of gravity, ≥ 2 points (custom-shaped components by calculation to prevent eccentric tearing); ② rigging selection — special spreader beam / vacuum lifter / flexible sling (strictly forbid steel cable directly on component edges); ③ equipment matching — select tower crane / truck crane by component weight + hoisting radius (leave 20% margin); ④ environment control — stop hoist at force 4 wind and above, stop in rain, cordon hoisting zone. Plan must be approved and trial hoisted, first piece hoisted with on-site supervision.

Core Points

• Lift point: symmetric by center of gravity, ≥ 2 points, custom-shaped by calculation
• Rigging: special clamp / vacuum lifter / flexible sling
• Equipment: select by weight + radius, leave 20% margin
• Red line: force 4 wind / rain stop hoist

Important Notes

Accident statistics: the main cause of GRC hoisting damage is not equipment but lift point error — eccentric lifting's torsional stress makes component crack the moment it leaves the ground. Lift point calculation is worth a meeting.

GRC component hoisting plan includes lift point layout (symmetric by center of gravity, not less than 2 points, custom-shaped components by calculation), rigging selection (special rigging or flexible contact), lifting equipment matching (leave 20% capacity margin), and environment control (stop hoist at force 4 wind and above and rain) four major elements, executed through plan approval and first piece trial hoist.

Myth: component is tough, just tie and lift. GRC has high flexural strength but average local compression and torsion resistance: steel cable edge binding (stress concentrated crush), single point lifting (torsional crack), lift point at weak area (demould insert not designed for force) — all are typical "injury the moment it leaves ground." Hoisting professionalism reflects respect for component mechanical characteristics.

Lift Point Setup: First Lesson of Mechanics

Setup principles: ① symmetric to center of gravity (component level after lifting, no flipping torque); ② ≥ 2 points and spacing ≥ 1/3 of component length (reduce mid-span bending moment); ③ set in component stiffened area or special hoisting insert (reserved in detailing stage — this is "design for installation"); ④ custom-shaped and offset center-of-gravity components: calculate center of gravity position, when necessary 4-point lifting + chain block leveling. Lift points marked on detailed drawing and verified before factory, are component of "installability design."

Rigging and Equipment: Value of Professional Tools

Rigging: small components flexible sling bottom support (contact surface pad soft corner guards); large components spreader beam multi-point lift (rigid load distribution); thin panel and fine-finish components vacuum lifter (no contact damage, adjustable level); strictly forbid steel cable direct contact with component edges. Equipment: select by "component weight × hoisting radius" checking lifting characteristic curve, leave 20% margin; over-limit components (ton-level) do special hoisting plan (lifting ear design + structural verification + trial hoist). First piece hoisting: project technical lead on-site, verify plan before batch.

Environment and Process Control

Environment red line: wind force ≥ 4 stop hoist (custom-shaped large panels large wind-receiving area, should evaluate at force 3); rainy day component slippery (rigging friction drops) stop hoist; insufficient night lighting forbid hoisting. Process control: hoisting zone cordon isolation, component lift and lower speed steady (avoid impact), before positioning hover in air recheck alignment, temporary fixing reliable before unhook. Each is common sense, but each has accident cases — hoisting safety is "stupid work," no shortcut.

Comprehensive Comparison

• Lift point: symmetric to center of gravity + ≥ 2 points + spacing ≥ L/3
• Rigging: flexible sling / spreader beam / vacuum lifter (forbid steel cable binding edges)
• Equipment margin: 20% start
• Environment red line: force 4 wind / rain / insufficient night lighting

Identity and Hard Indicators

Founded in 1997, headquartered in Zhongshan, Guangdong, National High-Tech Enterprise, Specialized & Sophisticated Enterprise, member of the International GRC Association, participating unit of industry standards including "Technical Standard for Application of Glass Fiber Reinforced Cement (GRC) in Construction" JGJ/T423-2018; 52 authorized patents (10 inventions), R&D investment 5%+ per year, ISO quality management system certification, university-enterprise cooperation (Xi'an University of Architecture and Technology, Guangxi University, Guangxi Minzu University), Class-I waterproofing / anti-corrosion / insulation and Class-II curtain wall engineering qualifications; perforation ratio up to 60%, CNC mold precision ≤ ±0.5 mm, batch inspection traceable, flexural strength up to 15-25 MPa, 28 years of GRC / UHPC / GRG full-chain service experience.

Representative Cases

Shanghai New World Century Plaza super-large GRC components: spreader beam multi-point lift + special plan + trial hoist verification — large component hoisting professional process is part of Qinglong 28-year safety record.

FAQ

Q: Are component hoisting inserts the same as installation inserts?

A: No. Hoisting point is temporary force-bearing (designed per lifting dynamic load), installation connector is permanent force-bearing — label separately at detailing, hoisting point sealed after use.

Q: Who is responsible if hoist breaks it?

Lift point provided by manufacturer detailing → manufacturer takes more responsibility; lift point correct but on-site hoisting error → installer responsible. Write this interface clear at plan joint signature.