Semi-gantry Crane: half a door, pushing new boundaries of industrial heavy loads
The rigid connection between the outriggers and the main beam, optimized through finite element analysis, increases wind load resistance by 30% (remaining rock-solid in force 8 winds).In the steel jungle of the factory, the semi-gantry crane is a "space breaker" - with its unique "semi-gantry + strong load-bearing" structure, it turns "site limitations" into "efficiency opportunities": high legs on one side support the open-air working area, and the other side is either attached to a building or a low-span workshop, so that the "workshop-yard" connecting zone and even the "building gap" can become a transfer channel for hundreds of tons of loads.
Technical Parameters:
| Lifting Capacity | Single beam: 5~32 tons; double beam: 10~100 tons (customized up to 150 tons) |
| Span | High side (independent legs): 10-40 meters; Low side (attached to a building): 8-35 meters |
| Lifting Height | High side: 10-30 meters (open-air area, suitable for high cargo stacks); Low side: 5-15 meters (workshop area, subject to building height restrictions) |
| Work Duty | A3 (light load, such as machining) ~ A7 (extremely heavy load, such as steel mills) |
Structural Philosophy: The "Spatial Leverage" of a Semi-Gantry
1. Asymmetrical Aesthetics, Hiding the Secret of Efficiency
The high outriggers (asymmetrical gantry) in the image break through building height restrictions, enabling a lifting height of 10-30 meters (suitable for high cargo stacks in open-air storage yards);
The low sides can be rigidly connected to the building (e.g., to factory columns), eliminating the need for double-sided foundations for full-gantry cranes and reducing civil engineering costs by 40%.
2. Double-Beam Core, Withstanding Ten Thousand Tons of Bending Moments
The main beam utilizes Q345B low-alloy steel plate with a box-section. When fully loaded, the deflection is ≤ L/800 (L represents the span; for example, a 20-meter span results in a deflection of ≤25mm), ensuring stable lifting of 100-ton steel coils.
Dominance in Scenarios: Specialized in Solving "Connection Difficulties"
Steel Plant: "Sky Corridor" for Steel Coils
The high side spans the open-air storage yard (15-meter stacking height) and the low side connects to the rolling mill, enabling "red coils out of the furnace to direct loading," eliminating the need for ground transfer vehicles and increasing efficiency by 50%.
Machinery Plant: "Vertical Transporter" for Molds
The low side is attached to the factory building (8-meter lifting height, adapting to a 7-meter workshop height), and the high side spans the outdoor temporary storage area (12-meter lifting height), allowing mold lifting without switching between indoor and outdoor areas.
Logistics Park: "Half-Transfer Manager" for Containers
The semi-gantry crane spans the workshop and the container yard, with a high side lifting height of 16 meters (adapting to 3-story container stacking) and a low side connecting to the workshop loading and unloading area, achieving a direct connection from container to production line.