20 Tonnellata di gru a ponte: Singolo contro. Prezzo doppia trave

20 Tonnellata monotrave vs. Double Girder Bridge Cranes

The primary distinction in 20-ton overhead cranes is between single girder and double girder designs. The choice depends on your application’s specific requirements for frequency, arco, and duty cycle.

20 Tonnellata di gru a ponte monotrave

A single girder crane features one main beam (trave) upon which the hoist and trolley travel. The hoist is typically mounted under the girder.

Ideale per: Applications with lighter duty cycles, shorter spans (typically up to 30 metri), and where cost-effectiveness is a primary concern.

Key Characteristics:

• 1. Lower Cost: Simpler design requires less material and fabrication, resulting in a lower initial investment.
• 2. Lighter Weight: Puts less stress on the building structure, which can be crucial for existing facilities.
• 3. Reduced Headroom: The hoist sits directly under the girder, requiring less vertical clearance (headroom) than a comparable double girder crane. This is ideal for buildings with height restrictions.

Limitation: Generally not suitable for extremely heavy-duty, continuous (CIC – Continuous Intermittent Cycle) applications or very long spans.

Applicazione

20 Ton Single Girder Electric Overhead Travelling Crane

20 Ton Explosion Proof Single Girder Overhead Crane

20 Ton Low Headroom Single Girder Overhead Crane

20 Ton Double Girder Overhead Crane

A double girder crane features two main beams that support a trolley that runs on top of the girders. The hoist is mounted on this trolley.

Ideale per: Severe-duty applications, longer spans (over 30 metri), higher duty cycles (CIC), and situations requiring maximum hook height.

Key Characteristics:

• 1. Higher Capacity & Durata: The dual-girder design offers superior strength and is built for intensive, frequent use.
• 2. Greater Hook Height: Because the trolley runs on top of the girders, the crane provides a higher lift, maximizing the usable space below.
• 3. Additional Features: Can more easily accommodate auxiliary hoists, magnet packages, or other special lifting attachments.

Limitation: Higher initial cost and weight, and requires more headroom.

Applicazione

20 Ton Double Girder Overhead Crane with Hoist Trolley

20 Ton Grab Bucket Overhead Crane

20 Ton Overhead Crane Technical Parameter Table

Parametro	20 Ton Single Girder Crane	20 Ton Double Girder Crane
Capacità	20 Tonnellate	20 Tonnellate
Span (S)	Up to ~30 meters	Custom, often over 30 metri
Altezza di sollevamento (H)	Custom (PER ESEMPIO., 6M, 9M, 12M)	Custom (PER ESEMPIO., 9M, 12M, 18M)
Work Duty	A3 / FEM 1Am (Light – Moderate)	A4-A7 / FEM 2m-4m (Moderate – Severe)
Operating Speed
– Hoisting	8.0 m/mio (approx.)	3.3 – 20 m/mio (variable frequency drive)
– Long Travel	20-30 m/mio (approx.)	20-100 m/mio (variable frequency drive)
– Cross Travel	10-20 m/mio (approx.)	20-40 m/mio (variable frequency drive)
Modalità di controllo	Pendant Control / Radio Remote	Pendant Control / Radio Remote / Cab
Alimentazione elettrica	3-Phase, 380V/400V/415V, 50Hz/60 Hz	3-Phase, 380V/400V/415V, 50Hz/60 Hz
Ambient Temperature	-20°C to +40°C (Standard)	-25°C to +45°C (Standard)

20 Ton Double Girder Overhead Crane

20 Ton Overhead Crane Price

Providing an exact price is impossible without specific project details. UN 20 ton overhead crane price is highly variable and depends on:

• 1. Type: A single girder crane is significantly less expensive than a double girder crane.
• 2. Span: The distance between runways directly impacts the price (longer span = higher cost).
• 3. Altezza di sollevamento: Higher lift requirements increase the cost.
• 4. Duty Cycle: Cranes rated for severe-duty (Fem / CMAA Class D or E) cost more than light-duty (Class A) gru.
• 5. Controlli: Radio remote control adds cost compared to a standard pendant control.
• 6. Brand of Components: Using premium hoist brands (PER ESEMPIO., Konecranes, Demag) increases the price.

Price Range: A basic 20 ton single girder overhead crane might start around $15,000 – $25,000, while a custom, large-span, double girder overhead crane can easily exceed $50,000 – $100,000+. Always request a detailed quotation from a supplier.

Delivery Lead Time for a WEIHUA 20 Tonnellata di gru a ponte

The delivery lead time for a WEIHUA 20 ton overhead crane is not a fixed number but depends on several key factors related to the project’s complexity and customization. Generalmente, for a standard specification crane, the lead time ranges from 40 A 60 working days after the final order confirmation and receipt of down payment.

For more complex or heavily customized projects, the lead time can extend to 60-90 working days or more.

The following table breaks down the typical stages of the process and the factors that influence the timeline:

Stage	Estimated Duration (Working Days)	Key Influencing Factors
1. Engineering & Technical Clarification	5 – 10 giorni	Crane Type: A standard 20-ton single girder crane requires less engineering than a double girder or customized crane. Personalizzazione: Special requirements (PER ESEMPIO., special paint, extra safety devices, unique dimensions) lengthen this phase.
2. Procurement of Raw Materials & Components	5 – 10 giorni	Component Brand: Using standard, in-stock components speeds up the process. Specific requests for premium or non-standard brands (PER ESEMPIO., a specific motor or inverter brand) can cause delays. Material Availability: Market availability of steel and other raw materials.
3. Manufacturing & Assemblaggio	15 – 25 giorni	Production Schedule: This is the core production time for fabricating girders, assembling hoists, and building end carriages. Workshop Workload: Peak seasons can lead to longer queues.
4. Factory Testing & Ispezione (FAT)	3 – 5 giorni	Customer Requirements: If a mandatory Factory Acceptance Test (FAT) is required, it is scheduled in this period.
5. Confezione & Preparation for Shipment	2 – 5 giorni	Packaging Type: Standard export wooden case packaging is typical. Special packaging requirements may take longer.
6. Shipping & Logistics	Variable	Destination: Domestic shipping within China is fastest. International shipping (by sea or air) depends on the destination port and shipping schedules. Incoterms: The terms of trade (PER ESEMPIO., FOB, CIF) define who arranges logistics and affects the overall timeline to your site.

20 Ton overhead crane manufacturing process

WEIHUA Factory

Key Factors That Directly Impact Your Delivery Time

• 1. Single Girder vs. Double Girder: UN 20 ton single girder overhead crane has a simpler design and is often faster to produce. UN 20 ton double girder overhead crane is more complex, requiring more engineering and manufacturing time.

• 2. Level of Customization: Standard cranes are delivered fastest. Customizations like:

  • Explosion-proof specifications
  • Special paint coatings (PER ESEMPIO., for marine environments)
  • Unusual span or lifting height
  • Advanced control systems (PER ESEMPIO., automation, precision load positioning)
    will significantly increase the lead time.

• 3. Order Quantity: A single crane order will follow the standard timeline. A larger order for multiple cranes will naturally take longer, though there may be some efficiency gains.

• 4. Component Availability: WEIHUA manufactures many core components, which helps control the supply chain. Tuttavia, if you specify third-party branded components, their lead time must be factored in.

20 Ton Overhead Crane FAQ

Q1: Which is better for my workshop, a single or double girder 20 carroponte da tonnellata?

UN: If your usage is occasional, spans are short, and budget is key, a single girder is likely sufficient. For daily, intensive use, long spans, or needing maximum hook height, a double girder is the better, more durable investment.

Q2: What maintenance is required for a 20 carroponte da tonnellata?

UN: Regular inspections are essential. Daily checks by the operator, periodic inspections by a supervisor (monthly/quarterly), and a full annual inspection by a qualified technician are recommended to ensure safety and longevity.

Selecting the right 20-ton lifting equipment is a strategic decision that impacts your operation’s safety, efficienza, and productivity. By understanding the differences between single and double girder cranes, as well as alternatives like gantry and jib cranes, you can make an informed choice. Contact us today for a free consultation and a customized quotation for your 20-ton overhead crane solution.

Q3: How to get a precise delivery date?

UN: To receive a firm delivery date, it is essential to provide WEIHUA with your detailed requirements. A formal quotation will include a specific lead time.

For the most accurate and competitive offer, please contact us with your specifications.

We, WEIHUA, are committed to providing high-quality cranes and reliable delivery schedules. We understand that your project timeline is critical and will work closely with you to ensure a smooth process from order to delivery.

WEIHUA Overhead Crane PDF Information: Scaricamento