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COVINICRANE MH type single girder gantry crane is a cost-effective rail-mounted lifting equipment designed for outdoor yard operations. Adopting single main girder and electric hoist structure, it is widely used in factories, material yards, building material markets and logistics yards for loading, unloading and transshipment of goods such as steel, profiles and prefabricated components.
Understanding the key components helps you specify the right crane for your application. A single girder gantry crane is composed of the following main assemblies:
Main Girder: Single box beam or truss beam fabricated from Q345B high-strength structural steel. The main girder carries the hoist trolley and all dynamic and static loads.
End Trucks: Welded steel end carriages connecting the main girder to the legs. Equipped with precision-machined wheels running on ground-level rails.
Legs: Rigid or flexible legs (or a combination for L-type cranes). Rigid legs transmit vertical loads directly; flexible legs allow thermal expansion.
Electric Hoist & Trolley: CD1/MD1 wire rope hoist or chain hoist; travels along the bottom flange. Speed, rope drum, and hook assembly are all replaceable.
Bridge Drive Mechanism: Motorized end trucks with helical gear reducer and brake motor. Variable-speed (VFD) drive available for precise load positioning.
Electrical System: Main control panel, festoon cable or conductor rail, pendant push-button station or radio remote control. PLC-based control optional.
Rail & Runway System: KP or QU series crane rails on concrete foundation or steel runway beams. Supplied and designed to suit your site layout.
Safety Devices: Over-speed governor, over-travel limit switches, load limiter, emergency stop, anemometer (outdoor cranes), anti-collision devices.
Cabin / Remote Control: Pendant push-button standard; cab control or radio remote available for long-travel or outdoor cranes.
| MH Box Type | Specifications |
| Lifting Capacity | 2 / 3 / 5 / 10 / 16 / 20 t |
| Span | 5 – 35 m |
| Lifting Height | 6 / 9 / 12 / 18 m |
| Lifting Speed | 8 m/min (high) / 0.8 m/min (low, dual-speed) |
| Trolley Travel Speed | 20 m/min |
| Bridge Travel Speed | 20 – 32 m/min |
| Duty Class | A3 – A5 |
| Standards | GB/T 14406, FEM, CE |
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