What is a semi-gantry crane?
Semi-gantry cranes are also commonly referred to in the industry as single-leg gantry cranes or single-side leg gantry cranes. One end of the equipment is equipped with rigid legs and travels along ground-mounted rails; the other end has no legs and is directly supported on the main steel beams of the factory building. Combining the two major advantages of stable operation of overhead cranes and flexible layout of gantry cranes, it is a popular lifting equipment for factory renovation and upgrading projects.
Structural Advantages of Semi-Gantry Crane
Lower civil engineering investment
Only a single-side ground rail foundation is required. Compared with full gantry cranes with double legs, it greatly reduces the workload of foundation construction, and no large-scale ground excavation is needed for the renovation of old factories.
Fully free up floor space
Only one side of the outriggers occupies the passage, leaving larger areas for workshop material transportation and forklift movement. It is highly suitable for processing workshops with dense production lines.
Multiple specifications are available.
They are divided into single-girder semi-gantry cranes and double-girder semi-gantry cranes, with lifting capacities ranging from 1t to 50t. Various optional configurations including variable frequency speed regulation, explosion-proof design and intelligent remote control are supported.
表 1Single Girder Semi-Gantry Crane
表 2Double Girder Semi-Gantry Crane
Main Application Scenarios of Semi-Gantry Cranes
- Steel Structure Processing Workshop, Mechanical Equipment Assembly Plant Area
- Upgrading and Renovation Project for Lifting Equipment in Old Factories
- Mold Workshop, Plate Warehouse, Steel Cutting Workshop
- Small outdoor storage yards and open operating areas alongside factory buildings
- Chemical industry, hardware manufacturing and equipment maintenance workshops; explosion-proof versions can be customized
Reference Parameters for Procurement Selection
| NO. | Core Parameter Dimensions | Selection Specifications and Standard Requirements |
|---|---|---|
| 1 | Rated Lifting Capacity | 3–50t |
| 2 | Span | 14–35m |
| 3 | Lifting Height | 6–12m |
| 4 | Working Class | A3/A4/A5 |
| 5 | Power Supply Voltage | 380v / 50Hz / 3P (Custom voltage available) |
| 6 | Control Mode | Handle/remote control/air operation |
| 7 | Operating Environment | Standard models for general conditions; explosion-proof cranes and anti-corrosion coatings for damp, dusty, or explosive environments. |
What benefits can you get by choosing a semi-gantry crane from Henan Mine?
Henan Mine Crane Co., Ltd. was founded in 2002 and is located in Changyuan, Henan, known as the "Hometown of Cranes in China". It holds complete qualifications for manufacturing special equipment, owns a national-level technology research and development center, and is capable of non-standard customization of various semi-gantry cranes.
- Free Scheme Design: Custom layout solutions for old factories and special-shaped workshops
- Full-process technical verification: conduct professional calculation on the bearing capacity of factory support beams and support legs to ensure the long-term safe operation of equipment
- Rich optional configuration solutions: variable frequency systems, explosion-proof configurations, intelligent limiters and remote monitoring can all be installed as required.
- One-stop Service: Full-chain support covering equipment production, remote guidance, commissioning, operator training and regular maintenance
- Global Delivery Experience: Our products are sold to more than 130 countries and regions worldwide. We support various international trade terms including FOB and CIF, and can provide English technical documents and export packaging.
If you are planning a workshop hoisting renovation and are unsure whether an overhead crane or a semi-gantry crane is suitable for your factory building, you can directly contact Henan Mine. Provide your factory drawings to obtain exclusive hoisting solutions and accurate quotations.
Contact: Chloe
Tel: +86 18238799707 (Same number for WhatsApp)
Email:sales07@minehenancranes.com
FAQs
Q: Can a semi-gantry crane be installed in an old workshop?
A: Yes, but the primary prerequisite is that the steel beams on the top of the factory building meet the load-bearing requirements. Engineers from Henan Mine can conduct on-site surveys and load calculations. If the load capacity is insufficient, we can provide a steel structure reinforcement plan at the same time.
Q: What is the maximum tonnage available for a semi-gantry crane?
A: Conventional single-girder models range from 1 to 20 tons. Double-girder semi-gantry cranes can be custom-made up to 50 tons. For heavy-duty working conditions with large tonnages, our technical team needs to assess the factory building conditions.
Q: Can semi-gantry cranes be installed for outdoor operation?
A: They can be used outdoors. Optional accessories including rainproof motors, outdoor anti-corrosion paint and windproof rail clamps must be equipped to prevent equipment sliding under strong winds.
