Semi gantry crane & Single Leg Gantry Crane
Single Girder / Double Girder Gantry Crane Design up to 32 Ton

Semi gantry crane is a variant of regular gantry crane with one end supported on a leg running on the ground rail and the other end travelling overhead on wall mounted track, therefore also called Single Leg Gantry Cranes. The single leg semi gantry cranes offers a cost-effective solution for factory or applications with narrow, confined spaces or crowded machinery.

Main parameters of semi-gantry cranes

The semi gantry cranes is a small or middle scale gantry crane, which can maximize your space utilization. With single gantry girder design, the capacity of single girder semi-gantry crane is range from 1 ton to 16 ton, and with double gantry girder design, the capacity of the double girder semi-gantry crane is from 3 ton up to 32 tons.Due to the semi-gantry frame design and semi-overhead crane design, the single legged semi-gantry crane owns the advantages of full gantry crane and overhead cranes, widely used for material handling indoors and outdoors.

Main parameters of semi-gantry cranes

• Crane type: BMH semi-gantry crane with single leg gantry design
• Lifting capacity of semi gantry cranes:1t to 16t, 5 ton -32 ton
• Span of semi gantry cranes:5m to 20m, 18m to 35m
• Light Height of semi gantry cranes:6m to 12m,
• Working class of semi gantry cranes:A3, A4
• Ambient temperature of semi gantry cranes:-20℃ to 40℃

Semi-gantry crane: Single girder design vs. Double girder design

In terms of gantry girder designs, the semi gantry cranes can be grouped into single girder semi-gantry crane and double girder semi-gantry cranes. With single gantry girder design, the capacity of single girder semi-gantry crane is range from 1 ton to 16 ton, and with double gantry girder design, the capacity of the double girder semi-gantry crane is from 3 ton up 32 ton. The main parameters of the single girder & double girder semi-gantry cranes are shown as following：

BMH Semi Single Girder Gantry Crane 1t to 16t

BMG Semi Double Girder Gantry Crane 5t to 32t

Structures & components of semi-gantry cranes

Semi gantry crane is a special form developed on the base of Gantry Crane. The semi gantry crane has one end of gantry girder,move on an overhead runway system elevated like an overhead crane supported on the building of factory workshop and at the other side of gantry girder is supported on one gantry girder moving on a rail like a standard rail mounted gantry crane.

BMH Semi Gantry Crane Drawing

Main components of semi-gantry cranes

The semi-gantry crane is mainly consisted of the main crane parts and components such as,crane bridge girder , travelling mechanism, trolley part, electrical control system and other electric part,etc. The main crane parts and components such as , hoist, main girder, crane out-trigger or legs, and ground end beam, are presented for your reference. More information about parts and components of semi-gantry cranes, please feel free to contact us.

Electric Hoist :
Dual speed CD1,MD1 wire rope electric hoist, with single girder design & double girder design, can be mounted on single beam & double beam bridge crane, gantry crane and arm cranes.

Main Beam :
Main girder beam is de-rustd by sandblast and painted with zinc rich epoxy primer, and cut by plasma numerical control cutting machine with high precision.

Outrigger :
The rigid outrigger design and flexible outrigger,are all connected by high -tension bolt.
When the length of span is beyond 30m, a flexible leg is need to reduce the lateral thrust of the loaded trolley to the rail.

Ground End Beam :
End beam is de-rustd by sandblast and painted with zinc rich epoxy primer, equipted with wheels which is produced in special vacuum casting workshop with more elastic and durable hard-wearing outer surface.

Electric Hoist :Dual speed CD1,MD1 wire rope electric hoist, with single girder design & double girder design, can be mounted on single beam & double beam bridge crane, gantry crane and arm cranes.

Main Beam :Main girder beam is de-rustd by sandblast and painted with zinc rich epoxy primer, and cut by plasma numerical control cutting machine with high precision. The ultrasonic or x-ray flaw detection is used to ensure the quality of the butt welding of tension flange.

Outrigger :The rigid outrigger design and flexible outrigger,are all connected by high -tension bolt. When the length of span is beyond 30m, a flexible leg is need to reduce the lateral thrust of the loaded trolley to the rail.

Ground End Beam :End beam is de-rustd by sandblast and painted with zinc rich epoxy primer, equipped with wheels which is produced in special vacuum casting workshop with more elastic and durable hard-wearing outer surface. .

Semi gantry crane, your economical material handling solution

Semi gantry cranes, the special form of overhead gantry cranes combine the advantages of overhead travelling bridge cranes and gantry cranes, but with higher flexibility than overhead eot crane and lower cost than the standard regular rail gantry crane. Semi gantry crane is a good choice to save investment and space, especially when you are in the following conditions:

• Your plant needs an efficient solution to coordinate forklifts to handle heavy or very long loads to improve safety, efficiency and save time.
• Your lifting volume is moderate which does not need to install an expensive and permanent overhead travelling crane system.
• Your plant has existing overhead cranes, but need an economical and versatile lifting system to supplement the existing crane system.

Semi gantry crane has a widely application for various industrial applications, Generally, semi gantry cranes can be used in the following two typical applications:

• Indoors - Semi gantry cranes is used to cooperate with the the existing overhead bridge cranes to provide more hooks and to improve the productivity of your factory.
• Outdoors - The single leg gantry crane is used outside but near the building, , taking advantage of the existing runway structure, to improve the cost efficient of your building.

All in all, Semi Gantry Cranes offers your economical material handling solution with lifting capacity up to 32 ton and crane span up to 32 m, which is an excellent alternative solution to expensive overhead cranes. Single leg semi gantry crane is widely used for material handling in open warehouse,mechanical processing workshop, outdoor places, etc. However, standard semi gantry crane is not allowed to be in hazardous environments, such as, the environment of combustible, explosive, dusty and corrosive, etc.

Advantages of single leg semi-gantry crane

• Customized design, Compact crane structure, Durable gantry girder design, Great rigidity.
• Good crane performance,Smooth crane starting and stopping,Stable and reliable traveling, Strong ability of lateral load proof.
• Crane installation and operation with high flexibility, Excellent exchange ability for parts and components,.Convenient maintenance,
• Low noise, No pollution,Electricity saves,Less investment

Features of Semi-gantry Crane

• Dual speed electric hoist with CD,MD motor, travelling on rail of semi gantry crane.
• Three-in-one motor used on the semi gantry crane to save more working space.
• Best light crane equipped with hard tooth face reducer & three-in-one motor for outdoor or workshop use.
• Lowest space between the top of trolley crab and the trolley rail, 20-30 % less than the traditional type.
• Electric panel with more than 2 million times service life, are used on the semi gantry crane.
• Various protection devices and alarming devices are used to .ensure the security and stability of semi-gantry crane.

Get your customized semi-gantry crane

Drawing of Semi gantry cane: Span Length and Lifting Height

How to select a semi-gantry crane for your application? In order to give you suitable semi gantry crane solution and specific crane price promptly, please confirm the following with our gantry crane engineer as much as possible:

• Gantry girder design of semi-gantry crane: Single girder / double girder design? With 1 cantilever/ no cantilever?
• Capacity: ____ ,Span:____, Height of Lift:____,Travelling Length:___
• Power supply: 3 phase___Voltage___ Hz
• Operation: Through Pendant/Radio Remote/Cabin Control?
• Application: Industry type: _____, Indoor/Outdoor: ____. Loads: _______
• Size of Existing Rail: ___

Free consultation of semi gantry crane is available.Any questions or problem are welcomed.Please just leave a message below and reply will be given within 24 hours. Get your custom designed semi gantry crane.