This design provides the lifting capabilities of a gantry crane while utilizing existing building supports for part of its structure, offering both flexibility and space efficiency.

Key Features and Benefits:

1) Space Utilization:
Maximizes available height in facilities with low ceilings or other overhead obstructions.
2) Versatility:
Suitable for a variety of applications, including manufacturing, warehousing, and assembly operations.
3) Installation Flexibility:
Can be installed in areas where conventional overhead cranes may not be feasible due to structural limitations.
4) Efficient Load Handling:
Capable of handling heavy loads with precision and safety.

Components:

1) Runway Beams: Support structures on which the crane travels. In under slung cranes, these are usually attached to the building's ceiling or roof structure.
2) End Trucks: The wheeled assemblies that ride along the runway beams, allowing the crane to move horizontally.
3) Bridge: The main horizontal beam that spans the gap between the runway beams and supports the hoist.
4) Hoist: The lifting mechanism attached to the bridge, used to raise and lower loads.
5) Control System: Can be a pendant, radio remote, or cabin control, used to operate the crane.

Applications:

Manufacturing Plants: For moving materials and components along the production line.
Warehouses: For efficient storage and retrieval of goods.
Assembly Shops: For precise positioning of parts and equipment.
Maintenance Areas: For lifting and moving heavy machinery and equipment.

Safety and Maintenance:

Regular inspections and maintenance are crucial to ensure the crane operates safely and efficiently.
Safety features such as overload protection, emergency stop buttons, and warning devices should be in place.