Overhead Crane Config for Precast Concrete Construction
Precast components (PC elements, prestressed concrete piles, and molds) are the backbone of prefabricated construction. Their manufacturing is defined by heavy unit weights (PC elements: 5–15 t each; piles: 3–10 t each; molds: 2–8 t per set), large dimensions, and high lifting frequency. For PC element plants, we recommend the QD-type double-girder bridge crane rated at 10–32 t, fitted with a specialized spreader — either a multi-point beam spreader or a clamp-type lifting fixture. For pile plants, the LD-type overhead crane at 10–20 t with a C-Hook or lifting slings is the preferred choice. Mold workshops are best served by an LD crane in the 5–10 t range. Kelude Heavy Industry supplies complete crane solutions for the prefabricated construction sector, covering everything from PC elements to piles and molds.
PC Element Cranes: Specialized Spreaders for Large Concrete Components
PC elements — including composite slabs, prefabricated wall panels, precast stairways, beams, and columns — weigh 2–15 t each and can measure up to 8 m × 4 m. Lifting these components presents two distinct challenges: first, concrete is a brittle material that cannot withstand impact during handling; second, the exposed surfaces serve as the building's finished facade (with embedded finishes, insulation, and window frames), so wire ropes must never come into direct contact. This is why PC element cranes must be equipped with specialized lifting spreaders.
Recommended model: QD-type double-girder bridge crane, 10–32 t capacity, 18–30 m span, 8–12 m lifting height. The critical element is the spreader system: ① a multi-point beam spreader (4–8 lifting points connected to the hoist hook via a spreader beam, ideal for composite slabs and wall panels); ② a clamp-type spreader (hydraulic or mechanical jaws that grip the component from the sides, suited for beams, columns, and stairways). A rotation ring can be retrofitted between the spreader and the crane hook, allowing the component to rotate 90° or 180° in the air for easier demolding and transfer.
Price reference: A QD double-girder crane (16 t / 24 m span) with a 4-point beam spreader costs approximately $33,000–$59,000 per unit; clamp-type spreaders run about $4,500–$12,000 per set. Kelude's PC element spreaders can be customized to match your product dimensions, with adjustable suspension point spacing for versatile handling across multiple component types.
Pile Manufacturing Cranes: Handling High-Slenderness Components
Prestressed concrete piles (PHC piles) range from 10–30 m in length, 300–600 mm in diameter, and weigh 3–10 t each. Their extreme slenderness ratio (length-to-diameter up to 50:1) demands exceptional balance during lifting — both ends must rise and lower in perfect synchronization, or the pile can fracture from single-point stress. Pile handling spans the entire production process: centrifugal molding, steam curing, prestress release, cutting, stacking, and shipping.
Recommended model: LD-type overhead crane, 10–20 t capacity, 20–30 m span, 8–10 m lifting height. The spreader system should include a C-Hook or multi-point sling spreader — the C-Hook inserts into the pile end and lifts the entire unit, ideal for single-pile handling; the sling spreader (3–4 slings distributed along the pile length) suits simultaneous multi-pile lifting. A low-speed hoisting setting of 1–2 m/min is recommended to minimize pendulum swing.
Price reference: An LD overhead crane (16 t / 26 m span) costs approximately $15,000–$27,000 per unit; C-Hooks run about $3,000–$7,400 per set. Kelude's pile workshop cranes come standard with variable frequency hoisting and electronic anti-sway control, significantly reducing handling risks for high-slenderness components.
Mold Manufacturing Cranes: Precision Machining & Assembly
Both PC elements and piles depend on molds for production — PC molds (steel or aluminum) shape the concrete during casting, while pile molds (cylindrical shells and end plates) form piles during centrifugal molding. Molds present three challenges: ① moderate weight (2–8 t per set); ② stringent machining accuracy (mold closing surface gaps ≤ 0.5 mm); ③ complex construction (embedded part positioning mechanisms, quick-release fixtures, and heating pipelines).
Recommended model: LD-type overhead crane, 5–10 t capacity, 12–18 m span. Mold workshop cranes handle steel plate transport (plates from 1.5 m × 3 m to 2 m × 6 m, 10–30 mm thick), mold closing at welding stations, and finished mold transfer. We recommend pairing a lifting magnet (for steel plate handling, eliminating wire rope rigging time) with a BZD jib crane (for loading and unloading at machining centers).
Price reference: An LD overhead crane (5 t / 15 m span) costs approximately $6,000–$12,000 per unit; lifting magnets rated 1–3 t run about $1,500–$4,500 each. A complete Kelude mold workshop package (1 LD crane + 2–3 BZD jib cranes) represents a total investment of roughly $10,000–$22,000.
Crane Configuration Comparison for Prefabricated Construction
| Workshop Type | recommended model | tonnage/Span | specialized spreader | reference price |
|---|---|---|---|---|
| PCComponent | QDdouble-girder bridge crane | 10~32t/18~30m | Cross Beam Multi Lifting point/Fixture | 22~40Ten Thousand |
| Pipe Pile | LDoverhead type | 10~20t/20~30m | C-Hook/Lifting Sling | 10~18Ten Thousand |
| die | LDoverhead type+BZD | 5~10t+Cantilever | Lifting magnet | 7~15Ten Thousand |
Key Crane Parameters for the Precast Component Industry
Kelude Service Advantages for Precast & Prefabricated Construction
① Specialized Lifting Spreaders: Kelude Heavy Industry offers a full range of dedicated lifting spreaders for PC components, including beam-type multi-point spreaders, fixture-type spreaders, and C-Hooks for piles. Suspension point spacing and clamping mechanisms are customized based on product dimensions, enabling versatile lifting of various component types.
② Full Product Coverage: From PC components and piles to molds, Kelude Heavy Industry provides a complete solution combining LD/QD overhead cranes, BZD jib cranes, and specialized spreaders. This unified approach integrates the electrical control system, reducing spare parts inventory and maintenance training costs.
③ Renovation of Old Workshops: For prefabricated construction companies with insufficient workshop height, Kelude Heavy Industry offers low-headroom crane solutions combined with pit-type demolding systems. This approach meets lifting height requirements without the need for workshop renovation, significantly reducing retrofit costs.
Frequently Asked Questions (FAQ)
Q: Why can't ordinary wire rope be used to lift PC components?
A: PC components leave the factory with the exterior decorative layer (tiles/stone/coating) and window/door frames already embedded. Direct contact with wire rope can cause: ① Damage to the decorative layer – the hard contact of wire rope can scratch or crush tile or stone finishes; ② Edge chipping of the component – the edges of concrete components are areas of stress concentration, and the localized force of wire rope can easily cause edge breakage; ③ Concrete crushing at lifting points – PC component lifting points typically use embedded lifting eyes or threaded sockets, and the rigid connection of wire rope may exceed the local compressive strength of the concrete at these points. Kelude Heavy Industry's specialized PC component spreaders use flexible lifting slings combined with beam-type multi-point distribution, and rubber protective pads are added to the contact surface between the sling and the component, completely eliminating these issues.
Q: Why is a C-Hook necessary for lifting piles?
A: The C-Hook is the standard lifting tool in the pile industry. It inserts from the end of the pile, with the hook body extending along the pile length toward the center of gravity. During lifting, the pile naturally aligns and balances within the C-Hook. Compared to wire rope slinging, the C-Hook offers: ① No manual rigging – inserting and removing the C-Hook takes only seconds, saving 20~30 seconds of auxiliary lifting time per pile; ② Even force distribution – the contact surface between the C-Hook and the pile is distributed along its length, preventing localized indentations from wire rope; ③ Enhanced safety – the C-Hook features a self-locking mechanism that automatically engages during lifting to prevent pile slippage. Kelude Heavy Industry can customize C-Hook specifications based on pile diameter (300~600mm) and length (10~30m).
Q: What is the typical investment scale for cranes in the prefabricated construction industry?
A: Using a factory with an annual production capacity of 100,000 m³ of PC components as an example: ① The PC component workshop is equipped with 2 QD 16t/24m cranes (approximately $59,300~$89,000) plus 4 sets of specialized spreaders (approximately $14,800~$29,700); ② The pile workshop is equipped with 1 LD 16t/26m crane (approximately $14,800~$26,700) plus 2 C-Hooks (approximately $5,900~$11,900); ③ The mold workshop is equipped with 1 LD 5t/15m crane (approximately $5,900~$11,900) plus 3 BZD jib cranes (approximately $4,400~$7,400). The total crane investment for the entire factory ranges from approximately $89,000 to $178,000. Kelude Heavy Industry can provide comprehensive crane solution design for prefabricated construction companies, matching the most economical configuration based on production capacity and product types.
Q: What are the workshop height requirements for cranes in a PC component workshop?
A: For PC component workshops, the crane lifting height typically ranges from 8 to 12 m. Adding the crane's own height (approx. 1.5–2 m) and the lifting spreader height (approx. 0.5–1 m), a factory building eave height of ≥12 m and a roof truss bottom chord clearance of ≥10 m is recommended. If the existing building height falls short, two options are worth considering: ① Low-headroom cranes—where the hoist is offset-mounted to reduce the crane's overall height by roughly 300–500 mm; ② A pit-style layout—where the mold-stripping area of the floor is recessed by 300–500 mm to effectively gain additional lifting height. Kelude offers complimentary on-site factory building surveys to tailor the most suitable crane solution based on your existing facility conditions.
