What is CT and LT in Crane?
AH : Auxiliary Hoisting motion. LT motion : Long Travel Motion. CT motion : Cross Travel Motion. Bridge : the structural portion on which the trolley/crab moves. LT End carriage : Structure which houses Long Travel Wheels.
How many types of EOT crane are there?
There are mainly two types of EOT cranes- single girder EOT and double girder EOT.
What is meant by EOT crane?
Electric overhead traveling crane or EOT crane is one of the most common types of overhead crane, also called bridge cranes, which consist of parallel runways with a traveling bridge spanning the gap. EOT cranes are normally powered by electricity.
What is single girder EOT crane?
Single Girder EOT Crane have only 1 No. Main Girder across the span. 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.
What is span of crane?
The crane span is the measured center-to-center distance between the runway beams. An overhead crane’s span is essentially its width across the bay—or the measured center-to-center distance between the runway beams.
What is crab in EOT crane?
The Crab includes the hoisting machinery placed on a frame, which is in turn fixed on at least four wheels and consists of suitable machinery for traversing the Crab to and fro motion along the main bridge girders of the crane. The crab wheels operate on two rail sections mounted on the top flange of the main bridge.
What is mot crane?
the transportation and lifting of heavy load. These cranes may be manually (hand) operated overhead travelling cranes (MOT) or electrically operated overhead. travelling (EOT) cranes.
What is hydra crane?
With a Hydra machine, one can both lift and carry the load of the material while the materials or the load can only be lifted and not carried by the cranes. Capacity- The weight capacity of the crane is more than that of a hydra machine. Stability- A crane is a more stable option.
What is the difference between single girder and double girder crane?
A single girder crane has only one bridge beam, and the hoist trolley operates or travels on the lower flange of the bridge girder. A double girder crane will have two bridge beams, and the hoist trolley travels on rails, usually attached to the tops of the crane girder.
What is a double girder bridge crane?
Double Girder Overhead Bridge Cranes On a double girder crane, there are two girder beams that make up the bridge and they’re supported by an end truck on each side. In most instances, the trolley and hoist run on a rail installed on top of the bridge girders.
What is a crane runway beam?
The crane runway beam section of overhead cranes can consist of a rolled I-section, either with or without side reinforcements for supporting horizontal loads, an I-section that has been welded together or a box girder. The same type of sections can be used for suspended cranes, however without a rail.