Which Factors May Affect For Single Girder Crane Design?
A specific type of tool that can lift and lower objects as well as move them horizontally is a crane. A hoist rope, wire ropes or chains, and sheaves are frequently included in its equipment. Large object lifting and relocation are the majority of its applications. The invention of the crane made the industrial revolution so easy to complete work in a short period of time.
There are various types of cranes on the market, depending on the load. First comes the Single Girder Crane.
Definition of Single Girder Crane Design
One single beam makes up a single girder crane, as shown by its outward appearance. For light-duty, brief-duration tasks, a single-girder crane is employed. Mainly single girder cranes are designed to lift loads above 20 tones and can work continuously for a maximum of 6 hours. Single-girder EOT cranes are advantageous for brief operations and light-duty loads.
Single girder cranes come in top- and under-running variations.
The breadth of a bay is simply the span of an overhead crane or the calculated distance from center to center of the runway beams. It is crucial because it establishes how much material will be needed to construct the bridge girders and has a big impact on how much the overhead crane will cost.
Importance of Single Girder Crane Design in Industrial Operations
One of the most pervasive myths regarding single-girder cranes is that they are less reliable or of poorer quality than double-girder cranes. A single girder crane might be the ideal choice for a firm that requires a light to medium-duty crane or for a facility where headroom and/or floor space are restricted if it is appropriately constructed.
For many applications and industries, single girder bridge cranes are the most economical lifting solution. Single girder cranes are significantly less expensive to manufacture, ship, and install than double girder cranes because they require less material and are more lightweight and compact. These systems frequently have less deadweight since they only require one bridge beam, allowing them to connect to the present building support structure and use lighter runway systems.
Other benefits include:
Due to a more straightforward tram design, lower freight costs, a quicker and easier installation process, and less material needed for the bridge and runway beams, the cost is lower.
Reduced deadweight results in lighter loads on the foundations or building structure. It can frequently be supported by the roof structure that already exists without the need for additional support columns.
Better hook strategy for bridge and tram travel.
Ideal for factories, production facilities, warehouses, material yards, and workshops.
How to Calculate Crane Duty Class?
According to the crane load situation and the grades of cranes being utilized, crane duty classification is done. The classification principle is based on the regularity of various cases, the average load, and maintaining the same crane life at the same level.
The classification of cranes also raises the generality of crane components. The lifting capacity of crane parts operating at the same general crane level can be determined. For this reason, the classification of cranes has become a crucial foundation for the design of crane parts, components, and components themselves. In order to establish a standard, security checks, scrap standards, and accident studies are also taken into account. As a result, even though the duty classification, scrap standard, and safety factor are all different,
considering them all together gives us a better understanding of how to classify cranes.
Difference between Single girder cranes and Double girder cranes
The span of a single-girder EOT crane has just one main girder. But The span of a double-girder EOT crane is supported by two main girders.
In most cases, single girder cranes have no repair platforms or only have two small platforms for LT mechanism maintenance. But Platforms over the main girders are located on both sides of double girder cranes for maintenance purposes and platforms for crab maintenance.
Under-bridge lighting is not present with single girder cranes. For the appearance of working at night,
double girder cranes use underbridge lighting.
For MH, CT, and LT motions, single girder cranes have vertical gearboxes installed on flanges. Double-girder cranes have horizontal gearboxes and foot-mounted motors.
Single-girder cranes can be controlled by remote control or by pendent, but not by the operating cabin. Pendant, radio remote, and operating cabin are all available ways to operate double girder cranes
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