What is overhead crane?

What is overhead crane? An overhead crane, commonly called a bridge crane, is a type of crane found in industrial environments. This is the definition from google Wikipedia. But we guess it is not easy to understand for green hands. We think an overhead crane is a kind of lifting equipment for loading, unloading or moving materials to save resources and improve efficiency.

Aicrane double girder overhead crane

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In the year 1876, Sampson Moore designed and manufactured the first-ever electric overhead crane in England. The crane was used to handle guns at the Royal Arsenal in Woolwich, London. Since that time Alliance Machine was one of the earliest cranes in the US market. The crane was in service until approximately 1980 and is now in a museum in Birmingham, Alabama. With the development of science and technology, there is a lot of innovations for overhead crane, the Western load brake(which is now rare) and the wire rope hoist(which is still popular), have come and gone.

Single girder overhead crane operation

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Nowadays, electric overhead travelling(EOT) crane is the most commonly used crane in the world. The reason why the EOT crane is so popular is that it has great features and advantages.

  1. Smooth starting and ending
  2. Good performance, less maintenance
  3. High efficiency, low noise
  4. A reliable safety protection system to entirely keep the safety of operators
  5. High-cost performance, low operational cost
  6. Full remote control and manual operation choices
  7. Simple structure, easy operation, installation and maintenance
  8. Famous brand, international overhead crane supplier – AIMIX Group
overhead crane structure
overhead crane structure

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Overhead crane can be designed and manufactured into different sizes, capacities, and shapes, and choosing the correct type of overhead crane is vitally important for your business. Different applications require different types of overhead crane, and there is no one overhead crane can fit all. So the following need to be taken into consideration when choosing a crane for your project.

  1. Working environments, indoors or outdoors
  2. Working conditions and working temperature
  3. Type and weight of the material
  4. Required capacity or the rated load
  5. Length or span length of the crane
  6. How often the crane will be used

Single girder overhead crane

This bridge crane is made up of one girder supported on each side by an end truck. In general, single girder overhead crane is designed and produced for light-duty service. It has a small size and lightweight. We can also call it small overhead crane or portable overhead crane. Besides, because of the compact and simple structure, it is very easy to transport, install and operate. All in all, if you have a small workshop, warehouse, garage or others, a single girder bridge crane is highly suitable for your project.

single girder overhead crane

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Double girder overhead crane

This bridge crane consists of two beams supported by an end truck on each side. Double girder overhead cranes are suggested for heavy-duty applications where cranes have to handle heavier lifting capacities and longer spans. It has a powerful lifting capacity and stable performance. The loading capacity of it from AIMIX Group can reach 800 ton. And it is ideal for your manufacturing and installation factory.

double girder overhead crane

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Top running overhead crane

Top running overhead crane is a commonly used type of crane. It has no limiting loading capacity, it can safely and efficiently handle small loads or large loads, and the rated load of it from us can reach 800 ton. Top running crane can be designed as single girder or double girder structure. Double girder overhead crane usually designed as top running bridge crane to ensure stable performance and safety. And it is typically larger than underhung bridge crane.

Underhung bridge crane

Underhung bridge crane, or under running overhead crane, use wheels that are supported by the bottom flange of the runway beam to move the bridge up and down the runway. An under running crane is commonly configured in a single girder design for small service or lower-capacity applications.


An overhead crane has a very wide range of applications. As we all know, an overhead crane or bridge crane is used for lifting or moving small or large items in all various different places, such as the warehouse, garage, workshop, manufacturing and maintenance factory, assembly factory, etc.

It can be used both indoors and outdoors. Overhead crane for sale from AIMIX Group has high quality, favorable price, and long service life. Welcome to contact us for more information.

Overhead crane specification

Technical Parameter of AQ-LD Single Girder Overhead Crane

Capacity t 1 2 3 5 10 16 20
Span m 7.5~31.5 7.5~31.5 7.5~31.5 7.5~31.5 7.5~31.5 7.5~31.5 7.5~31.5
Height m 6~30 6~30 6~30 6~30 9~30 9~30 9~30
Lifting speed m/min 8(0.8/8) 8(0.8/8) 8(0.8/8) 8(0.8/8) 7(0.7/7) 3.5(0.35/3.5) 3.3(0.33/3.3)
Trolley speed m/min 20(30) 20(30) 20(30) 20(30) 20(30) 18 14
Crane speed m/min 20(30) 20(30) 20(30) 20(30) 20(30) 20(30) 20(30)
Work duty A3-A4 A3-A4 A3-A4 A3-A4 A3-A4 A3-A4 A3-A4
Track type P18 P18 P24 P24 P24 P24 P30 P30 P38 P38 P43

Technical Parameter of AQ-LH Model Double Girder Bridge Crane

Capacity t 5 10 16 20 32
Span length S(m) 10.5~31.5 10.5~31.5 10.5~31.5 10.5~31.5 10.5~31.5
Lifting Height m 6~30 9~30 9~30 9~30 9~24
Lifting speed m/min 8(0.8/8) 7(0.7/7) 3.5(0.35/3.5) 3.3(0.33/3.3) 3(0.3/3)
Trolley speed m/min 20(30) 20(30) 20(30) 20(30) 20(30)
Crane speed m/min 20(43) 20(43) 20(43) 20(43) 20(43)
Work duty A3~A4 A3~A4 A3~A4 A3~A4 A3~A4
Track type P30 P24 P38 P38 P38 P43 P43

Technical Parameter of AQ-QD Double Girder Overhead Crane

Capacity t 5 10 20 32 50
Span S(m) 10.5~31.5 10.5~31.5 10.5~31.5 10.5~31.5 10.5~31.5
Lifting height m 6~16 6~16 6~16 6~18 6~16
Lifting speed m/min 11.5 8.5 7.2 6 6
Work duty A3~A7 A3~A7 A3~A7 A3~A7 A3~A7
Track type P38 P43 P43 QU70 QU80
Capacity t 75 100 160 200 300
Span S(m) 13~31 13~31 13~31 13~31 13~31
Lifting height m 6~20 6~20 6~22 6~22 6~24
Lifting speed m/min 3.9 3.1 3.5 2.6 2.4
Work duty A3~A7 A3~A7 A3~A7 A3~A7 A3~A7
Track type QU100 QU100 QU120 QU120 QU120

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