| Single-Girder Overhead Crane | Up to approximately 20 t | About 6–30 m | About 6–18 m | Light to medium service; commonly aligned with FEM 1Am–3m or CMAA Class A–C, subject to design | General manufacturing, maintenance bays, warehouses, workshops and material handling areas | Lower structural weight, economical installation and good use of existing building space | Lower capacity and shorter span potential than a double-girder design; hook approach may be less favorable |
| Double-Girder Overhead Crane | Approximately 10–500 t or more for specialized systems | About 10–40 m | About 6–30 m | Medium to very heavy service; commonly selected for frequent or demanding lifting cycles | Steel processing, heavy fabrication, power equipment, shipyard areas, foundries and large industrial plants | High load capacity, greater rigidity, improved hook coverage and suitability for heavy-duty lifting | Higher purchase, runway and building-support costs; requires more headroom and structural assessment |
| Top-Running Overhead Crane | Approximately 1–500 t, depending on configuration | About 6–40 m | About 6–30 m | Light to heavy service, selected according to load frequency and operating environment | Facilities with dedicated runway beams and sufficient building height | Broad capacity range, strong stability and efficient travel over a dedicated runway | Needs suitable runway beams and adequate headroom; building modifications may be required |
| Underhung or Under-Running Crane | Commonly up to approximately 10 t | About 6–25 m | About 4–15 m | Light to medium service with moderate lifting frequency | Buildings with limited headroom, light manufacturing lines, assembly areas and flexible workstations | Can operate beneath roof-support structures and may provide better use of low-clearance buildings | Capacity and runway loading are limited by the building structure; less suitable for very heavy loads |
| Single-Leg Semi-Gantry Crane | Approximately 1–20 t | About 10–35 m | About 5–15 m | Light to medium service, normally for outdoor or mixed indoor–outdoor handling | Workshops with one existing runway, loading zones, storage yards and production extensions | Uses one building runway and one floor-supported leg, reducing the need for a complete runway structure | Requires a suitable building-side runway and a properly designed floor rail or track |
| Double-Leg Gantry Crane | Approximately 5–500 t or more for specialized applications | About 10–40 m | About 6–30 m | Medium to heavy service, including frequent outdoor lifting | Steel yards, precast concrete plants, shipbuilding, container handling and outdoor fabrication | Does not require a full overhead runway building; suitable for large outdoor working areas | Needs level ground, rails, travel clearance, wind protection and adequate foundation design |
| Single-Leg or Cantilever Gantry Crane | Approximately 1–20 t | About 8–30 m | About 5–15 m | Light to medium service with localized lifting requirements | Outdoor storage, loading areas, small fabrication yards and extensions beside existing buildings | Cost-effective for one-sided coverage and can extend handling beyond the building edge | Lower rigidity and coverage than a double-leg gantry; load distribution must be checked carefully |
| Explosion-Protected Girder Crane | Commonly up to approximately 50 t, depending on hazardous-area classification | About 6–30 m | About 5–20 m | Light to heavy service with equipment specified for the applicable hazardous zone or division | Petrochemical facilities, chemical processing, paint operations, gas-handling areas and dust-risk locations | Designed to reduce ignition risks through suitable electrical, mechanical and control-system protection | Higher procurement and maintenance cost; area classification and certification must be verified before selection |
| Process or Automated Girder Crane | Approximately 5–100 t, depending on the process | About 10–35 m | About 6–25 m | High utilization, repetitive cycles and controlled operating paths | Production lines, coil handling, storage systems, casting operations and continuously operating plants | Repeatable positioning, reduced manual intervention and compatibility with sensors and plant-control systems | Higher integration cost and greater dependence on reliable controls, sensors and site data |