Single Girder Gantry Crane:

• Lifting Capacity: 1-20 ton
• Span: 12m-30m
• Lifting Height: 1m-20m
• Working Class: A3、A4
• Temperature: -25℃～+40℃
• Power Supply: 3-ph, 380V,50HZ

We can also design and manufacture non-standard products according to your needs.

Gantry Frame of Single Girder Gantry Crane:

Mainly composed of main girder, ground beam, landing legs, outrigger, ladders, platforms, driver's room, etc.

Main girder

1. Main bearing structure, traveling rail of electric hoist
2. Material Q235B or Q345B ( similar as Fe37 or Fe52)
3. U-type groove, inclined plate, rib plate made by cold bending suppress steel plate weld solid web girder with i beam, or truss girder welded by steel plate group
4. Arched main beam according to request, the arch degree F should be (1/1000~1.4/1000) S, max. Arch degree be in the scope of middle span S/10
5. There are saddle seat jointed with legs in the two sides of span position, and there are square steel plate connect with flange
6. Buffers at the girder ends ensure trolley's safe traveling along the main girder.

Ground beam

1. Ground beams support the main girder and load, and also connect main girder and traveling mechanism, one of the main loading metal structures.
2. Box structure girder welded by U-type groove and steel plate group or only steel plates, with features of light structure, good rigidity, appearance and welding technology
3. Buffers settled at the ends of ground beam

Legs

1. Isosceles trapezoid or right or left trapezoid box pillar welded by steel plate. Wide flanges welded at the upside and narrow flanges at the downside of the pillar increase the rigidity and stability of the gantry frame
2. Two flexible legs designed for improve crane traveling effect when span ≥ 30m
3. Bolts connect two flanges to become an "A" structure, increasing the crane's stability
4. Bolts connect steel plate flange between legs and ground beam, simple structure, easy to install, transport and store

Sollar

1. Steel tubes, steel angles bending, antiskid riffled plate on the platform, retaining plate settled at the bottom of platform; guardrail height:1050mm, the distance of two level cross bars is 350mm
2. The inclined angle of ladder and horizontal plant is 55°, 60° or 65°

Cabin room

1. generally adopted the closed type, top of the cabin can stand 2.5KN dead load at least.
2. The head room height inside the cabin ≥ 1.8m.

Control mode of Single Girder Gantry Crane:

1. Pendant: control the actions of all mechanisms by pressing the buttons
2. Remote control: control the actions of all mechanisms with industrial remote control
3. Cabin control: control the actions of all mechanisms with the buttons, master switches, cam controller or linkage in the cabin

The single girder gantry crane could also have two sets control devices, such as: pendant + remote control or cabin + remote control. Two control modes could not be used together for safety.

Electric protection system of Single Girder Gantry Crane:

1. Short circuit protection: Automatic air-breaker switch in main power circuit as short circuit protection of the crane control circuit.
2. Voltage-loss protection
3. Circuit structure has Voltage-loss protect function, the start button must be repressed to restart the crane when power restoration after break in case of the crane automatic operating.
4. Emergency power switch: Rotating reset type emergency power switch like a red mushroom used for switching off power quickly in emergency condition. Emergency power switch set in convenient place
5. Overload limiter: Overload limiter will send hint alarm signal when the load reach 90% rated capacity. The power for lifting will be cut together with prohibitive alarm signal when reach 110% rated capacity. The sensor linked with control box, moistureproof and anti-seismic, anti-interference.
6. Position limiter: Fire limiter in lifting mechanism as the switch to limit the lifting height, at the same time, protect the controller. Traveling limiter in crane traveling mechanism, composed of traveling limit switch on the crane and safety rule at the place get out of the crane travel, ensure safe travel of crane. Wind-proof rail clamp is installed at one end of ground beam when used outside. Limit switch on rail clamp interlocks with main power switch, that is to say crane could not start when it is locked on the rail by rail clamp.
7. Zero position and interlock protection: Cabin control crane has zero position and interlock protect function. Zero position protection prevent the motor automatic operating when restore power after power off, avoid accidents. Interlocking of door and switches avoid accidents like people or objects fall down from the door when the crane start suddenly as the door open.
8. Three-phase fault & voltage fault protection: Comprehensive protection in circuit system will cut off main power automatically when three phase fault or voltage fault in case of damaging people and equipments.
9. Ground protection: Metacor of crane and metal shell, raceway, low side of transformer of electric equipments all have grounding. Total grounding resistance≤4Ω, and the crane rails could be as ground wire. Insulation resistance to ground≥1MΩ at normal temperature (it is measure value of 500V megger at normal temperature).

Overall Drawing of Single Girder Gantry Crane:

Paint Coating & Appearance of Single Girder Gantry Crane:

1. Surface derusting processing for steel plate before welded;
2. The derusting quality level of main girder, legs, upper beam and lower beam should reach Sa2 1/2 or St3 level of GB/T8923 at least, other parts should reach Sa2 or St2 level;
3. Painting the crane color as customer requirement before leaving factory. Coating thickness of mechanisms≥50μm after drying; paint film thickness of metal structure part: 25μm~35μm per layer, total: 75μm~105μm. Exposed surface without coating should take antirust measures.

Single Girder Gantry Crane Price:

Single Girder Gantry Crane（t）	Price(USD)
1 ton	$2,200 - $40,000
2 ton	$2,500 - $43,000
3 ton	$2,600 - $45,000
5 ton	$3,000 - $46,000
10 ton	$4,000 - $48,000
15 ton	$5,000 - $50,000
20 ton	$6,000 - $55,000

Specifications of Gantry Crane with Electric Hoist:

Capacity	t	3	5	10	16	20
Span	S(m)	7.5~31.5	7.5~31.5	7.5~31.5	7.5~31.5	7.5~31.5
Lifting height	m	6~18	6~18	6~18	6~18	6~18
Lifting speed	m/min	8（0.8/8）	8（0.8/8）	7（0.7/7）	3.5（0.35/3.5）	3.3（0.33/3.3）
Trolley speed	m/min	20(30)	20(30)	20(30)	18	14
Crane speed	m/min	20(30)	20(30)	20(30)	20(30)	20(30)
Work duty		A3~A4	A3~A4	A3~A4	A3~A4	A3~A4

 Application of Single Girder Gantry Crane:

• Manufacturing industry: In factory workshops, single girder gantry cranes are commonly used for handling raw materials, semi-finished products and finished products, especially in assembly lines, machining and welding operations, and are capable of efficiently accomplishing material transfer tasks.
• Warehousing and logistics: Single girder gantry cranes are used for loading and unloading of goods, stacking and transshipment, and are especially suitable for handling heavy or bulky items, such as containers, steel and large mechanical equipment.
• Construction sites: Single girder gantry cranes are used for lifting construction materials (such as steel bars, precast concrete parts, etc.), assisting in the installation of construction equipment and improving construction efficiency.
• Port and Terminal: Single girder gantry cranes are used for loading and unloading ship cargo, especially in small ports or temporary workplaces, and are favored for their flexibility and low cost.
• Energy industry: In the fields of electricity, oil and gas, single girder gantry cranes are used for installing and maintaining equipment, such as lifting components of wind turbines and installing pipelines.
• Railway and highway transportation: Single girder gantry cranes are used for lifting tracks, bridge components and other heavy equipment.

Features and advantages of Single Girder Gantry Crane:

• Simple structure: Single girder gantry crane consists of one main girder and two outriggers, which is compact and easy to install and maintain.
• High Flexibility: The span and height of single girder gantry crane can be customized according to the site requirements to adapt to different working environments.
• Cost-effective: Compared with double girder gantry cranes, single girder gantry cranes have lower manufacturing costs, which is suitable for projects with limited budgets.
• Easy to operate: Equipped with electric hoist or manual hoist, it is easy to operate and suitable for frequent lifting operations.
• High safety: Equipped with limiters, overload protection and other safety devices to ensure safe operation.
• Strong adaptability: Single girder gantry crane can be used indoors or outdoors, adapting to a variety of working environments, such as high temperature, low temperature or humid environment. .