Ship-to-Shore (STS) Cranes | Loading/unloading containers from ships to quay | Lifting Height: 15m (ISO 13031 compliant) Rated Load: 10 tons (Base) ▲ 100 tons (Advanced) (ASTM F1111) Extendable Boom (Reach up to 60m) | ▲ Highest capacity tier for heavy containers (e.g., 40ft containers) Precision ship alignment | High cost Fixed position (not mobile) 1-year warranty (Industry standard: 2 years) |
Rubber-Tired Gantry (RTG) Cranes | Stacking containers in storage yards | Lifting Height: 18m (ISO 13031) Capacity: 30–40 tons (ASTM F1111) Mobile on rubber tires | Cost-effective for stacking Flexibility to relocate within terminals | Limited reach for ship operations Slower than straddle carriers |
Rail-Mounted Gantry (RMG) Cranes | Transferring containers between rail and storage | Lifting Height: 20m (ISO 13031) Capacity: 50 tons (ASTM F1111) Rail-mounted stability | Higher capacity than RTG Stable for heavy loads | Fixed path (limited mobility) Higher installation cost |
Straddle Carriers | Transporting containers within terminals | Lifting Capacity: 30–40 tons (ASTM F1111) Speed: 25 km/h (ISO 3410) Straddle container stacks | Fast intra-terminal transport Compact design for tight spaces | Lower capacity than cranes Limited stacking capability |
Mobile Harbor Cranes | Versatile harbor operations (e.g., loading/unloading bulk cargo) | Lifting Capacity: 20 tons (ASTM F1111) 360° rotation Boom Length: 50m (ISO 4309) | Versatility for mixed cargo types Mobile on outriggers | Lower capacity than STS/RMG Slower operation speed |
Container Reach Stackers | Stacking containers in tight storage areas | Fork-like arms (ISO 13031) Lifting Capacity: 45 tons (ASTM F1111) Compact Design | Efficient for narrow storage spaces Cost-effective for short-distance transport | Limited operational range Slower compared to RTG/STS |