Semi Gantry Crane

The semi gantry crane is composed of a bridge, a cart running mechanism, a trolley running mechanism and a hoisting mechanism. In Ellsen crane factory, the company can both provide you semi gantry hoists and gantry cranes with full beams. Either type of gantry crane you need, the company can make it available to you.

BMH Box Structure Semi Gantry Crane
BMH Box Structure Semi Gantry Crane

Light duty semi gantry crane specifications

  • Lifting Capacity: 1t~16t
  • Span Length: 5~20m
  • Lifting Height: 6~18m
  • Working Class: A3, A4
  • Traveling Speed: 20~30m/min
  • Lifting Speed: 3-8m/mim or 0.3/3-0.8/8m/min


Semi gantry crane design from Ellsen gantry crane factory

Ellsen semi gantry crane is designed by strictly in line with the following national crane manufacturing standards:

  • Crane Design Code (GB3811)
  • Crane Safety Code (GB6067)
  • Crane Test Code and Regulations (GB5905)
  • Code for Construction and Acceptance of Lifting Equipment
  • Installation Project (GB50278) Wire Rope Electric Hoist (JB/ T9008.1~9008.6)
  • Quality Classification of Steel Wire Rope Hoists(JB/ZQ8004)
  • Safety Regulations for Wire Rope Electric Hoists” (JB9009)
  • Electric Hoist Gantry Cranes (JB/T5663)
  • Product Quality Score for Electric Single Girder Cranes Et al. (JB/ZQ8012)
  • Shape and Position Tolerance (GB/T1182-1184)
  • Steel Surface Corrosion Ratings and Degusting Grades (GB8923)
  • Planning Tests for Paints and Clear Films (GB9286)

Types of Semi gantry cranes available to you at Ellsen semi gantry crane factory

In Ellsen Semi Gantry Crane Factory, the crane supplier can provide you semi gantry cranes for different industrial fields, such as the semi portal gantry crane for marine industries. Moreover, the company can also provide you semi gantries equipped with optional parts, such as the semi hoist gantry crane which is facilitated with an electric hoist as its auxiliary lifting systems to promote the lifts working efficiency. Most importantly, our factory can manufacture different types of semi gantry cranes with different capacities, such as the 1t, 2t, 3t, 5t, 10t and 20t semi gantry cranes which are hot sales in our crane manufacturing factory. The following are some types of hot sale semi gantry cranes’ specifications for your reference.

BMG Type Outdoor Use Semi Gantry Crane
BMG Type Outdoor Use Semi Gantry Crane

Double girder semi gantry crane specifications

  • Lifting Capacity: 5t~32t
  • Span Length: 18~35m
  • Lifting Height: 6~12m
  • Working Class: A4, A5
  • Working Temperature: -20~40℃


All types of Ellsen semi gantry crane design and manufacturing process are strictly meet the above mentioned national standards. And our half gantry cranes are all qualified and they are all in store and have been tested and inspected by our professional crane inspection and testing equipment and engineer teams. Meanwhile, they are all ready to receive you, our clients all around the globe to receive your detailed inspection.

How semi gantry crane parts get connected?

MHB electric single girder semi-portal cranes are mainly composed of electric hoists, carts, steel structures, and electrical equipment. The steel structures are mainly composed of main girders, outriggers, lower beams, upper beams, and ladders. The main beam is in the form of a single main beam structure, and an electric hoist is hung under the I-beam of the main beam. One end of the main beam and the cross-section rectangular cross-section leg and the lower cross-member are bolted, and the other end and the upper cross-member are also bolted to facilitate disassembly. There are a total of 4 walking wheels for the trolley running mechanism and 2 walking wheels for both sides of the track. The crane power supply adopts AC 380V 50Hz, the cart uses the safe trolley wire to supply power; the electric hoist uses the cable to supply power. The crane also has safety protection devices such as overload protection and limit of various institutions.

Double Girder Euro-standard Semi Gantry Crane
Double Girder Euro-standard Semi Gantry Crane

Major lifting systems and facilities of the semi goliath crane

Lifting mechanism of the semi hoist machine using the electric hoist as the operating lifting crane, mainly consists of cone rotor motor, reducer, reel device, coupling, guide rope, hook device, electric trolley, drive device and electric appliance and other components. The components can be relatively independent in structure and easy to maintain and adjust.

Material selection of the Semi Cranes Trolley Traveling System

The crane trolley traveling mechanism consists of the active wheelset, passive wheelset, and cross beam. The whole machine has 4 wheels, 2 wheels on each side, and 1/2 drive. The wheel material uses cast steel wheels according to ZG340-640. The top of the crane uses double-rimmed wheels and the bottom uses rimless wheels; the buffer uses rubber buffers. Track models use the Chinese industry standard YB/T5055. The speed reducer adopts a closed speed reducer. The wheels are driven with open gears. The gear shafts are mounted on machined beams.

Function highlights of Ellsen semi gantry cranes

The metal structure consists of a single main beam, legs, lower beams, and upper beams. The legs are welded in the form of a box structure. The force is concise and clear, and the appearance is elegant. The bolts are connected between the legs and the lower beam to facilitate disassembly. The lower beam and the upper beam are mainly welded by U-shaped beams. The vertical deflection of the wheels, the horizontal deflection, and the installation of the vehicle running mechanism are all guaranteed by the manufacturer and welding of the lower beams.

Six electrical parts requirements of the semi gantry crane

Power supply equipment

  1. Power supply for trolley: Single pole type trolley wire is used for power supply, and the travel distance is about (the actual working condition of the owner) m, and the power status indicator needs to be installed.
  2. Car power supply: Powered by cable. The trolley’s power supply is mounted on the conductive side.
  3. Working power AC380V (85%-110%) 50HZ
  4. The cranes are respectively equipped with power circuit, a control circuit, and an auxiliary circuit. Each terminal in the control cabinet is arranged at the front to facilitate maintenance. Each terminal is marked with a corresponding wire number sign, the inner wall of the conduit is smooth, and the outlet of the hard pipe and electrical equipment enter the line mouth installed rubber protection sleeve.
  5. The electric cabinet is installed on the lower beam; the cable-controlled remote switch is not allowed to operate remotely during remote control.
  6. Hoist cable traction device is I-beam and pulley, traction rope is stainless steel.
BMG European Style Hoist Double Beam Half Portal Crane
BMG European Style Hoist Double Beam Half Portal Crane

Top 3 safety system configuration requirements on the half gantry crane

This machine has overload protection

  1. Stroke and height protection: The crane’s various movement mechanisms are provided with extreme stroke or height protection.
  2. The crane is equipped with short circuit protection, voltage loss protection, zero position protection, over current protection and various necessary interlock protection devices.
  3. The trolley running mechanism is equipped with a rail and the rail is 10mm away from the rail surface so that obstacles on the rail can be removed.
BMG Semi Gantry Double Girder Overhead Crane with Electromagnetic Rotating Hanging Beam
BMG Semi Gantry Double Girder Overhead Crane with Electromagnetic Rotating Hanging Beam

How to paint the semi gantry crane

All steel plates and section steels are calibrated and pretreated. The quality reaches Sa2.5 (as specified in GB8923-88) and surface primer. The total thickness of the film is thicker than 75μm. One layer of epoxy zinc-rich primer and the other layer epoxy intermediate paint sprayed with a layer of chlorinated rubber paint.

If you want to paint your own semi crane, things you should note

Painting: After the components are finished, they must be painted carefully. The bottom of the paint, the epoxy zinc-rich primer, and coating should be carried out in strict accordance with the coating process. Damaged paint for various reasons should be repaired according to the process requirements.
In Ellsen semi gantry crane factory, the crane color can be customized. Thus, if you want to have a semi gantry crane in your favorite color, come in connection with us.

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