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Single girder overhead crane travels along 2 parallel rails on workshop supporting structure and its lifting mechanisms (electric hoists) travel along crane girder. Single girder overhead crane consists main girder, end girder, traveling mechanism, hoisting mechanism and electrical components. This single girder crane is usually used in long distance workshops and travels along the rails/tracks on both sidewalls.  

This crane is a single girder type crane with traditional steel girder (I beam, H beam steel) or box-typed girder. The lifting capacity is usually not more than 20 tons. This type crane can be used in workshops, steel plants, hydro-power stations, warehouses, machine manufacturing plant, etc.

Mechanisms of Weihua Single Girder Overhead Crane:

1. Rigid box-typed main girder;

2. Shot blasting treatment for the whole structure surface after welding and releasing internal stress;

3. Epoxy zinc-rich primer for coating, and the thickness of the coating is 140μm;

4. Main girder and end carriages are connected by 10.9 degree high-strength bolts, stable and durable;

5. Driven by electric reducer or traditional drive system;

6. Running smoothly, brake efficiently, long service life;

Electric:

1. Supplying power through steeples downshop conductor (bus bar);

2. The crane and hoist are mutually independent and able to work at the same time;

3. Etch-proof control handle with protection degree of IP54;

4. Electric cable is suspended in cable trolley which slides flexibly and smoothly on a C-type steel;

Safety:

Overload limiter, limit switch (hoisting and travelling), interlocking protection device, buffer, rail clear plate, shield, bus protection plate, anti-collision device, main disconnecting switch, emergency brake system and motor overload protection device. 

https://www.hoistcrane.nl/single-girder-overhead-crane/