Single Girder Crane or Double Girder Crane which is better
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Single Girder Crane or Double Girder Crane which is better
December 22, 2023
Single girder cranes and Double Girder cranes both are equally strong and rigid. They are both designed as per IS: 807
Advantages of Single Girder Cranes
Single Girder Cranes have lesser weight because
There is only one cross girder, the weight is lesser compared to 2 girders in Double Girder Cranes
The Hoisting Mechanism is simple as it is a standard hoist, being modular weight of the Hoist is much lesser than its counterpart in Double Girder Cranes
The platform as in Double Girder Cranes is not feasible in Single Girder cranes
Due to lower weight of the Single Girder Crane the price is lower, the supporting structure i.e. gantry girders, columns and overall building size can be reduced.
Disadvantage of Single Girder Crane
Maintenance is difficult as there is no platform / accessibility
The lifting height is reduced compared to a similar double girder Crane
How Reva has conquered these above disadvantages
Reva is providing a maintenance platform on one edge (side instead of on the HOIST) of the single girder crane. {the option is available only on request}
The control panel is mounted on this maintenance platform. Hence is easily accessible and maintainable
Also the construction of the platform is such that the Hoist can be maintained from this platform.
Reva is offering Low head Room Hoist. Hence the disadvantage of single girder cranes is nullified as the height of the hoist is reduced and thereby the total height of the crane is reduced from hook to the crane top.
Then why can’t every crane be a single girder craneReva has done single girders cranes upto 30t Capacity. Above this single girder cranes are not recommended.Also the max span which we have done for single girder cranes is 25M.