1-32 Ton Outdoor Gantry Crane | Single Girder L Frame Crane
Short Video Description
This video shows a 20 ton and 32 ton outdoor gantry crane with a single girder L frame design for heavy load handling. The crane is designed for outdoor steel yards, fabrication plants, machinery storage, precast plants, construction sites and other industrial material handling applications.
The single girder gantry crane, also called a single girder portal gantry crane or outdoor Goliath crane, uses a welded main girder supported by L-type or semi-portal gantry legs. The configuration can provide practical hook coverage in areas where the crane must operate close to a building, storage structure or production line.
For a heavy duty outdoor gantry crane, the main technical parameters include lifting capacity, span, lifting height, rail gauge, cantilever length, duty class, wheel load, travelling distance, hoist type, power supply and wind conditions. For 20 ton and 32 ton cranes, these parameters must be reviewed together before the final structural design and quotation.
Main Technical Specifications
| Item | Technical Specification |
|---|---|
| Crane type | Single Girder Gantry Crane / L Frame Portal Gantry Crane / Outdoor Goliath Crane |
| Rated capacity | 1 to 32 ton, customized according to the required lifting load |
| Crane application | Heavy load outdoor material handling, steel yards, fabrication, machinery handling, precast and construction applications |
| Girder design | Welded single box girder, engineered according to capacity, span and duty class |
| Gantry leg design | L frame / semi-portal frame, customized according to site clearance and structural requirements |
| Gantry configuration | Single girder / L frame / single cantilever / double cantilever options available |
| Span | 10 – 35 m+, customized according to site layout and structural calculation |
| Lifting height | 6 – 20 m+, customized according to required hook height |
| Cantilever length | Typically 1 – 8 m per side, subject to girder strength, deflection and wheel load calculation |
| Rail gauge | 6 – 35 m+, customized according to crane geometry and wheel load |
| Travelling distance | 20 – 500 m+, according to ground rail layout |
| Hoisting system | Electric wire rope hoist / heavy-duty electric trolley / open winch according to crane configuration |
| Hoisting speed | 2 – 8 m/min, single speed, two speed or VFD |
| Trolley speed | 20 – 40 m/min, VFD available |
| Crane travelling speed | 20 – 40 m/min, customized according to duty class |
| Duty class | ISO A4 – A7 / FEM 2m – 4m, selected according to load spectrum and working frequency |
| Wheel arrangement | 4 / 8 wheels or engineered configuration according to calculated wheel load |
| Rail | P43 / P50 / QU70 / QU80 or rail selected according to calculated wheel load |
| Control | Pendant / Radio Remote / Operator Cabin |
| Power supply | 380V / 50Hz / 3Ph standard; 400V, 415V, 440V, 460V and 60Hz available |
| Safety devices | Overload limiter, lifting and travelling limit switches, emergency stop, buffers, travel limits, warning alarms and anti-collision devices where required |
| Outdoor protection | Weather-resistant electrical protection, protective coating, motor protection and wind-resistant design according to local site conditions |
| Working temperature | Typically -20°C to +40°C, customized for special environments |
| Applications | Steel yards, fabrication plants, machinery yards, construction sites, precast plants, heavy equipment storage and outdoor heavy load handling |
| Yuantai Crane engineering experience | Yuantai Crane engineers the single girder, L frame gantry legs, end carriages, wheels, rails, hoisting system and travelling mechanism as one complete crane system. For 20 ton and 32 ton applications, the design is checked against capacity, span, lifting height, duty class, wheel load, deflection, stability and outdoor wind conditions. |
Where Are 20 Ton and 32 Ton Outdoor Gantry Cranes Used?
A 20 ton outdoor gantry crane or 32 ton outdoor gantry crane is suitable for industrial yards where heavy loads must be lifted and moved without an overhead crane runway. The ground rail system allows the crane to travel across the required material handling area.
- Steel storage yards
- Heavy fabrication workshops
- Machinery manufacturing plants
- Precast concrete plants
- Construction material yards
- Heavy equipment storage areas
- Industrial assembly yards
- Steel structure fabrication yards
- Outdoor heavy load loading and unloading areas
Outdoor Protection for 20 Ton and 32 Ton Gantry Cranes
Outdoor crane design requires more than simply installing an indoor crane outside. A heavy duty outdoor gantry crane may be exposed to rain, dust, sunlight, wind and temperature changes. Electrical enclosures, motors, control equipment and structural coating should therefore be selected according to the local environment.
For coastal, humid or corrosive environments, the paint system can be upgraded according to the required corrosion protection level. For areas with strong wind, the wind load, rail clamps, anchoring system, travelling mechanism and crane stability should be checked during engineering.
FAQ
Common questions about 20 ton and 32 ton outdoor gantry cranes, single girder L frame cranes, portal gantry cranes, outdoor Goliath cranes and heavy load handling solutions.
1. What is a 20 ton or 32 ton single girder gantry crane?
A 20 ton or 32 ton single girder gantry crane is a ground-travelling crane with one main girder and a rated lifting capacity of 20 or 32 tons. It is used for heavy outdoor material handling where a building-supported overhead crane runway is not available or practical.
Yuantai Crane designs the main girder, L frame gantry legs, hoisting system, travelling mechanism, wheels and rails according to the required span, lifting height, duty class and actual load conditions.
2. What is an L frame gantry crane?
An L frame gantry crane uses an L-shaped or semi-portal gantry leg arrangement instead of a conventional symmetrical A-frame. It can be useful when the crane needs to operate close to a building, wall or other fixed structure.
The L frame geometry is designed according to the required clearance, span, lifting height, wheel load, stability and foundation conditions. It can also be combined with a cantilever when additional hook reach is required.
3. Is a single girder gantry crane suitable for 32 ton heavy load handling?
Yes, a 32 ton single girder gantry crane can be engineered for suitable heavy load applications when the span, lifting height, duty class and structural requirements are within the applicable design range.
The decision should not be based on lifting capacity alone. Yuantai Crane checks the girder strength, deflection, trolley load, wheel reactions, gantry leg stability and foundation loads before selecting a single girder configuration for a 32 ton project.
4. What is the difference between a single girder gantry crane and an L frame gantry crane?
A single girder gantry crane describes the main girder configuration, while an L frame gantry crane describes the shape or arrangement of the supporting gantry legs. Therefore, an L frame gantry crane can also use a single main girder.
For a custom outdoor crane, Yuantai Crane selects the girder and leg configuration together according to building clearance, hook coverage, span, lifting height, wheel load and foundation requirements.
5. What technical data is needed for a 20 ton or 32 ton gantry crane quotation?
For a 20 ton or 32 ton outdoor gantry crane quotation, provide the lifting capacity, span, lifting height, rail gauge, travelling distance, cantilever length, working frequency, power supply and site layout.
For heavy outdoor applications, also provide the expected wind speed, working temperature, foundation conditions, material type and lifting cycle. These details help Yuantai engineers select the appropriate girder section, hoist, L frame structure, travelling system and safety devices.
6. What is the typical span and lifting height of a 20 ton or 32 ton outdoor gantry crane?
A typical 20 ton or 32 ton single girder gantry crane can be designed with approximately a 10–35 m+ span and 6–20 m+ lifting height. The actual dimensions depend on the working area, load spectrum and structural requirements.
Yuantai Crane considers the complete crane geometry, including girder deflection, L frame stability, wheel loads, rail gauge, wind load and foundation conditions, before finalizing the crane dimensions.
7. What experience does Yuantai Crane have with 20 ton and 32 ton outdoor gantry cranes?
Yuantai Crane has engineering and manufacturing experience with single girder gantry cranes, portal gantry cranes, Goliath cranes, heavy load gantry cranes and customized outdoor crane structures. The engineering approach is adapted according to the crane capacity, span, duty class and application.
For 20 ton and 32 ton outdoor gantry crane projects, Yuantai engineers review the main girder, L frame gantry legs, end carriages, wheels, rails, hoisting system, travelling mechanism and foundation loads. The final design is matched to the customer's site dimensions, lifting requirements, operating frequency and outdoor environment.
Need a 20 Ton or 32 Ton Outdoor Gantry Crane?
Send us your 20 ton or 32 ton lifting capacity, span, lifting height, rail gauge, travelling distance, cantilever length, working frequency, power supply, wind conditions and site layout.
Yuantai Crane can engineer a 20 ton single girder gantry crane, 32 ton single girder gantry crane, L frame portal crane or outdoor Goliath crane according to your heavy load handling requirements.
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Article by Bella ，who has been in the hoist and crane field since 2016. Bella provides overhead crane & gantry crane consultation services for clients who need a customized overhead travelling crane solution.Contact her to get free consultation.
Yuantai Cranes
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- Main Specifications - Capacity: 0.5–550 tons | Span: up to 40m | Speed: 0.8–12 m/min | Duty: A3–A7 | Power: 380–690V, 50/60Hz | Control: pendant/remote/cabin
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- Crane type:_____ . (e.g., overhead crane, gantry crane, jib crane)
- Max weight to lift:_____ tons. (e.g., 2t, 5t, 10t, 20t, 50t)
- Lifting height:_____ m. (How high does the hook need to reach?
- Workshop width (span):_____ m . (Distance between the two crane rails)
- Travel distance:_____ m . (How long does the crane need to move along the runway?)
- Control type:_____. (Pendant / remote / cabin Control)
- Power supply:_____. (Local voltage & frequency – e.g., 380V, 50Hz, 3-phase)
- What will it be used for?_____ (e.g., steel fabrication, concrete products, mold handling, general manufacturing, etc.)
- Any special requirements?_____ (e.g., extreme temperature, dusty or explosive environment, special paint color, etc.)
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