Overhead travelling cranes :Single girder crane designs vs. Double girder crane designs
Overhead travelling cranes are one of the most frequently used material handling crane equipment in various industrial applications for light duty and heavy duty material handling with lifting capacity from 500 kg to 550 ton. Generally,the overhead travelling cranes are designed in single girder crane and double girder crane configurations to meet various lifting requirements and application conditions of many industrial sectors such as steel making factory, petrochemical industry, construction and many other industries, etc. Single girder crane design and double girder crane design, which is the right crane design for your overhead travelling crane?
Top running single girder overhead travelling crane 3d model drawing
Top running double girder overhead travelling crane 3d model drawing
Single girder overhead travailing cranes
With single girder crane design, the overhead travelling crane is mainly consisted of a single bridge girder, two end trucks, and a monorail trolley hoists which rungs along the bottom flange of the bridge girder between the end carriages. Single girder crane is widely used for light material handling with lifting capacity from 500kg to 20 ton, which can be designed into top running crane configurations & underhung bridge crane configurations.
General specifications of single girder overhead travelling cranes
- Lifting capacity of single girder crane: 500kg, 1ton, 2 ton, 3 ton, 5ton, 10 ton up to 20 ton
- Span of single girder crane: 7.5m~35m,
- Lifting height of single girder crane : As your request,
- Working class of single girder crane: A4，A5,A6
- Monorail hoist supply: Wire rope electric hoist or chain Electric hoist, European standard FEM hoists
Various single girder crane designs are available. Contact us to get process single girder crane designs and specific crane specifications and crane dimensions or to download free single girder crane pdf brochure.
Types of single girder overhead travelling cranes
European standard suspension single girder overhead crane
Lifting capacity of single girder overhead crane: 1ton,3 ton, 5 ton to 10 ton
Span of overhead crane: 3-15 m
Lifting height of single girder overhead crane: 3-100 m
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Suspension single girder overhead crane Chinese type
Lifting Capacity of single girder overhead crane: 0.5ton, 3 ton, 5 ton to 10 ton
Span of overhead crane: 3m to 31.5m
Working Class of Overhead Crane: A3 to A5
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FEM / DIN top running single girder overhead crane
Lifting Capacity of single girder overhead crane: 3.2ton, 3 ton, 5 ton 10 ton ton 16ton
Span of overhead crane: 7.5m to 28.5m
Working Class of Overhead Crane: A5
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Chinese style top running single girder overhead crane
Lifting Capacity of single girder overhead crane: 1ton, 3 ton, 5 ton,10 ton up to 20 ton
Span Length of single girder overhead crane: 7.5m-28.5m
Working Class of Overhead Crane: A3, A4
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Explosion proof single girder overhead crane
Lifting Capacity of Single Girder Crane: 1ton, 3 ton, 5 ton,10 ton up to 20 ton
Span of overhead crane: 7.5m to 28.5m
Working Class of Overhead Crane: A3, A4
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Partial hung low headroom single girder overhead crane
Lifting capacity of single girder overhead crane: 1ton, 3 ton, 5 ton,10 ton up to32 ton
Span of overhead crane: 7.5m to 22.5m
Working class of overhead crane: A3, A4
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Low headroom hoist single girder overhead crane
Lifting capacity of single girder overhead crane: 1ton, 3 ton, 5 ton,10 ton up to32 ton
Span of overhead crane: 7.5m to 22.5m
Working class of overhead Crane: A3, A4
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Ladle handling single girder overhead crane
Lifting capacity of single girder overhead crane: 1ton, 3 ton, 5 ton, 10t
Lifting Height of single girder overhead crane: 6~18m
Working class of overhead Crane: M5
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Advantages of single girder crane
With unique single girder crane design,our overhead travelling cranes are generally with the advantages of High stability and rigidity, Highly cost-effective, High efficiency and good performance, etc.
- Maximum rigidity for a minimum deadweight. The single girder cranes could keep the load on the overhead crane runway to a minimum.
- Lower loads on the building structure or foundations duo to the single beam girder structure and a reduced deadweight. For single girder suspension crane design, the overhead crane can be attached to the existing roof structure with no additional support columns.
- Lighter load on crane runway rails or beams results in less wear on the crane beams and end truck wheels over time
- Easier to install, operation, and maintain saves your time and improve your operation efficiency and safety.
- Various single girder crane designs, wide applications for facilities with low headroom workshops, warehouses, workshops, and factory workstations, etc.
- Cost-effective light to medium-duty overhead travelling crane solution. Less expensive single girder crane design, with a simpler monorail trolley hoist, reduced shipping costs, easy and faster installation, less cost for crane bridge and runway beams, and less cost for supporting structure, etc.
Limitations of a single girder design:
Due to single girder crane design, the overhead travelling cranes has its own limitations at the other side of the coin:
- Limited for light duty material handling with lower rated capacity.
- Offering limited hook height due to the hoist trolley is placed under the main girder which is less than a double girder crane
- With under hung bridge crane design, the hoist trolley of single girder crane may cause premature wear to the bottom flange of the beam.
- Single girder crane has limitations and difficulties in adding special features like walk platform, or other heavy components which can be expensive or difficult to incorporate.
Double girder overhead travailing cranes
With double girder crane configuration, the overhead travelling crane is generally consisted of two beam girders, two end trucks, and a lifting system, crane travelling system, electric controls, electrics, crane safety devices, and more others, etc. The hoisting trolley travels on top of rails which are are installed to the top of the bridge girders. The overhead double girder cranes are designed for heavy duty material handling with lifting capacity from 5 ton up to 550 ton, featured as high working frequency and safety.
General parameters of double girder overhead travelling cranes
- Crane type: overhead double girder cranes
- Lifting capacity of double girder crane: 5 ton, 10 ton, 20 ton, 30 ton, 40 ton, 50 ton, up to 100 ton
- Span of double girder crane: 7.5m~35.5m
- Working class of double girder crane: A5,A6
- Double girder overhead crane with process crane designs are available to meet specific requirements.
Types of double girder overhead travelling cranes
Chinese style double girder hoist crane
Overhead electric winch crane is China traditional heavy duty double girder overhead crane equipped winch trolley,Robust & Sturdy, Affordable industrial overhead winch cranes.
Chinese style double girder open winch crane
5 ton- 63 ton double girder overhead electric crane with rope hoist trolley / chain hoist trolley, competitive hoist trolley crane system, cheaper hoist trolley crane price, good electric overhead crane solution.
European style double girder open winch crane
European standard double girder overhead crane with open winch trolley, a heavy duty winch crane up to 320 ton, wide specifications hook cranes for wide application. Get FEM / DIN open winch travelling bridge crane now!
European style double girder hoist trolley crane
Advanced double girder overhead crane based on European DIN/FEM Standard with 5 ton-80 ton electric wire rope hoist trolley for hoisting industrial materials - European advanced wire rope hoist cranes!
Ladle crane: 5 ton -74 ton steel mill ladle crane & 5 ton up 320 ton ladle crane
Ladle cranes for 5 ton -320 ton ladle or liquid metal lifting, heavy duty ladle crane for steel mill, foundry, furnace, and casting factory. Good priced ladle crane, charging crane, casting crane & foundry crane !
Electromagnetic cranes & electromagnets
Electromagnetic overhead cranes with types of electromagnetic chucks & magnetic carrier beams for steel scraps, billet, slab,wire, coil, pipe, plate, etc., handling with efficiency and safety.
Rotary overhead crane with electro- magnet beam spreader
Magnetic crane is a double girder overhead crane with rotary crane design & electromagnet beam spreader, lifting long & larger steels, safe & efficient rotary overhead crane.
Grab crane- overhead crane with crane grab bucket
5 ton 10 ton 16 ton 20 ton Grab Overhead Cranes with orange peeler grabs or clamshell grab buckets for scattered material handling in power station, steel mill, port, cement plant,storage & waste recycling station, etc
Double girder overhead crane with double trolleys
Double trolley overhead cranes of (2.5+2.5)~(200+200) tons, double trolleys & double hooks for long & heavy lifting. Overhead double trolley cranes drawing & trolley crane pdf for you now.
Advantages of double girder cranes
Various crane configurations & process crane designs, the double girder cranes are with the advantages of High stability and rigidity, cost-effective，high efficient and stable performance
- Larger hook height – vertical lifting height of hoist hook above the ground.
- No limits to maximum span or capacity
- Ideal for heavy loads lifting and transportation.
- Ideal for frequent handling of heavy loads
- Added features can be added and supported by double girder crane designs such as, walkways and maintenance platforms, driver's cabs, magnetic reels, and lights, etc.
Limitations of double girder cranes
Double girder cranes are more expensive than single girder crane design due to the added material costs, additional supporting structures,, and more complex crane parts and components, etc. Additional costs related to crane shipping and installation comparing with a single girder crane.
Types of under hook devices
Besides, the top running double girder overhead cranes can be equipped with various below -the-hook devices and crane attachments for various industrial applications which including Ladle crane , Hook crane, Grab Crane,Electromagnetic Crane, Electromagnetic beam spreader, Tong crane / clamping crane/ gripper crane
Comparison of single girder crane designs vs. double girder crane designs
For overhead travelling cranes, single girder crane designs & double girder crane designs are the most frequent seen crane configurations. Both types of overhead cranes have their own advantages and limitations. Which is the better configuration for your overhead travelling crane application? Let's compare the single girder design and double girder designs to help you to find out the best fit overhead crane configuration.
Single girder vs. Double girder on crane girder designs Crane girder design is the major difference of single girder crane & double girder cranes:
- With Single girder crane design, the overhead travelling crane only has one beam girder which can be in top running crane & under hung crane configurations.
- With double girder crane design, the overhead travelling crane has 2 main beam girders which also can be in top running crane & under hung crane configurations but most frequently in top running overhead crane configuration.
By the way, have you ever doubted that a single girder crane is less durable than double girder crane ? Actually, it is a wrong conception. Based on crane specifications and with proper crane design, both single girder crane and double girder crane can provide equally rigidity, strength, and durability. This is because single girder cranes adopt much stronger cross girders and adopting lateral bracing, unlike double girder cranes.
Single girder vs double girder on crane costs Double girder cranes are more expensive than single girder crane design due to the added material costs, additional supporting structures,, and more complex crane parts and components, etc. Additional costs related to crane shipping and installation comparing with a single girder crane. However, crane cost is the not the decisive factor on buying an overhead crane. Let's go on the comparison analysis.
Single girder vs double girder on lifting capacity
- Single girder cranes are light duty cranes which are usually with the lifting capacity from 500kg to 20 ton at most.
- Double girder cranes are heavy duty cranes with lifting capacity from 5 ton to more than 500 ton based on process crane designs.
Single girder vs double girder on hook height
With single girder crane design, the monorail hoist is suspended on the bottom flange of the main girders, which offering less hook height in the given workshop. With double girder crane design, the hoisting trolley is equipped on the top of the two bridge beams and the lifting hook are placed between the two beams and offer larger hook height than a single girder crane in the same application.
Single girder vs double girder on hoisting trolley system
- It consist of Electric Hoist travelling on lower flange of Main Girder and not required rail for cross traveling.
- It consist of a crab mechanism travels above both girders run over cross travel rails with platform to maintain all parts of crab.
Single girder vs double girder on crane control
- Crane controls for single girder cranes are optional from ground pendent and Radio Remote controls.
- Crane controls for double girder cranes are optional from ground pendent ,Radio Remote control and crane driver's cab control.
Single girder vs double girder onmaintenance
- With under running crane design, the installation and maintenance of a single girder crane system is more complex and taking longer downtime because of the suspension crane design but with cheaper price.
- With top running crane design, double girder cranes are easy in maintenance but costly at price basis due to the installation of sides platform which makes crane maintenance easy to access.
Single girder vs double girder on applications
- Single Girder cranes are usually recommended for light duty applications for general material with standard working conditions.
- Double girder cranes are usually suggested for heavy duty material handling with flexible and process crane designs which are widely used in very critical applications environment such as in steel mills, waste managements, cement factory, concrete prefabrication factory, etc.
How to select from single girder crane & double girder crane
Trough the above comparison, the features of single girder crane and double girder crane can be understood which can help you to make a selection from the single girder and double girder design. Generally, the following factors has to be take into considerations：
- What is the loads required to be lifted? Including the weight, dimensions, temperatures, etc.
- What is the lifting requirements for the loads? lifting height, travelling path, lifting speed & lifting frequency, etc.
- What is the application conditions? Indoor or out door? In new or existing workshop? Any existing crane system ? What is the overhead clearance and floor space conditions? Is any obstructions or special requirement?
- What is the working environment? including the general & normal application, or in hash and extreme application such as hazardous environment with corrosive gas or of extreme temperatures, etc.
After the confirmations of the above parameters, you will help an idea about which type of crane is suitable for your application. And by the way, the most and effective way to get the right overhead travelling crane configuration for your application is to consult with a specialist on crane design and manufacturing. And also with the above information, your overhead crane manufacturer and supplier can recommended the right crane type for your specific applications. Send us an inquiry today.
Article by Bella ，who has been in the hoist and crane field since 2016. Bella provides overhead crane & gantry crane consultation services for clients who need a customized overhead travelling crane solution.Contact her to get free consultation.
