The main functions of cranes are lifting and lowering. Cranes are commonly encountered in companies or on construction sites. Cranes are also needed in a few other places, such as warehouses. The main job of a crane is to raise or lower massive loads that other machinery cannot. Cranes are used to move heavy loads between locations. A crane has a large, intricate framework. Hoists, chains, wire ropes, sheaves, and other specialised industrial power tools are also found in cranes. All of the separate tools work together to perform the crane’s task.
Here, we’ll mostly talk about the single-girder and double-girder crane types of EOT cranes. Before selecting between them, you must first comprehend a single-girder crane and a double-girder crane. This article will explain what bridge cranes are and which are appropriate for your needs, even if you have no prior knowledge of them. Continue reading to learn more about Single Girder Crane vs double girder cranes.
What is a Single Girder Crane?
The bridge consists of a single girder crane supporting an end truck on each side of a single girder beam. Most trolleys and hoists are underhung, which means they move along the bottom flange of the bridge. Either top-running or under-running will characterise the bridge’s construction. A single girder crane can be the best option for a business needing a light to medium-duty crane or for a facility with constrained headroom and floor area. Single girder bridge cranes are frequently the most cost-effective lifting solution for various applications and industries. There are significant material, freight, and installation cost reductions when using single-girder cranes as opposed to double-girder cranes since they utilise less material, are more manageable and weigh less.
Benefits of Single Girder Crane
The advantages of single-girder cranes include the following.
- 1. It is less expensive due to a more straightforward trolley design, cheaper freight costs, easier accessibility during installation, and the usage of less material for the bridge and runway beams.
- 2. It is the most economical option for light- to medium-duty cranes.
- 3. Due to the lower deadweight, fewer loads are placed on the building’s structure and foundation. In many cases, the roof structure already in place will hold it; no extra support columns are required.
- 4. An improved hook strategy is required for trolley and bridge traffic.
- 5. It is made simpler to perform installation, servicing, and maintenance.
- 6. Manufacturing and production facilities, warehouses, material yards, and workshops are all excellent options.
What is a Double Girder Crane?
The bridge on a double girder crane comprises two girder beams held up by an end truck on either side. Typically, a rail that runs along the top of the bridge girders is where the trolley and hoist are mounted. In a double girder design, you acquire the depth of the cross girder when the hoist is positioned between or on top of the cross girders, giving you, in most circumstances, an additional 18″–36″ of hook height. Double-girder cranes with top- or under-running options are available. A top-running double girder bridge crane offers the highest hook height and overhead space. For heavy-duty applications needing greater capacities and longer spans, cranes with two girders are advised.
Double-girder bridge cranes are better suited to lifting large objects than single-girder cranes since they may be utilised more frequently. They can be used indoors and outdoors in a bridge or gantry design and are commonly employed in mining, the production of iron and steel, railyards, and shipping ports.
Benefits of Double Girder Cranes
The advantages of double girder cranes are as follows:
- 1. Greater hook height refers to the hook’s height above the floor, which is normally 18 to 36 inches higher than the height of a single girder.
- 2. It is perfect for manufacturing and transporting heavy equipment because there are no restrictions on the maximum span or capacity.
- 3. Ideal for routinely lifting large loads.
- 4. Additional components, including walkways, repair platforms, cabs, magnetic reels, and lighting, will be supported by a twin girder design.
- 5. Applications can be found both indoors and outdoors, and examples include mining, iron and steel, railyards, and ports.
You should carefully consider how your overhead crane system is designed. A high capacity, wide span, or high lifting height might be advantageous for a double girder crane, but it would be more expensive upfront. Lighter-duty cranes can be a cost-effective option for increasing the effectiveness and safety of your production or assembly facility since they don’t have the extraordinary capacity or span restrictions or require a specific hook height.