Light Crane Systems and Offshore Containers

Light Crane Systems (Parallel Track, Bridge and Hoist)

• Defined as an assembly of lifting devices, bridges, trolleys, and tracks, typically made of steel sections
• Designed for lifting operations
• Advantages of light crane systems include smooth travel, silent operation, reduced wear, minimal pollution (nylon wheels), modular design, reduced stress on support structures, easy installation, modification, and maintenance
• Configuration typically includes two parallel tracks, with a single or dual bridge crane running between them
• Single bridge cranes are often manual, with a manual or electric chain hoist on a trolley within the bridge
• Dual bridge cranes have a trolley suspended between two bridge sections, usually with an electric chain hoist
• Power to the hoist and travel mechanisms can be supplied by festoon cables or internal conductor bars within the track profile

Offshore Containers

• Large containers used for shipping freight and services between offshore installations and ships
• Maximum gross mass typically 25,000 kg
• Designed to withstand high wear and tear during transportation and handling
• Built to recognised standards for durability and safety
• Often feature pad eyes for lifting, with various types available (waste skips, baskets, skids)
• Designated marking requirements to conform to relevant standards

Lifting Set for Offshore Containers

• Designed for the maximum gross mass of the container
• Enhancement factors related to the dynamic movements during offshore lifting must be considered
• Top leg (forerunner) is required if the lifting set doesn't hang over the long side to a specific height to prevent danger to the rigger from standing on the container.

Mobile Cranes

• Manufactured in various forms, with common types including yard cranes, truck-mounted cranes, rough terrain cranes, and city cranes
• Yard cranes are used in factories and plants for carrying small loads on a platform
• Truck-mounted cranes are multi-use and relocate quickly
• Rough terrain cranes are suitable for uneven ground, easily relocating, loading, and moving goods
• City cranes are designed for confined urban spaces

All Terrain Crane

• A common type of crane suitable for different types of terrain, and efficient for highway transport
• Truck-mounted crane, HIAB, or crane truck, typically attached to a truck, to move goods from and to the truck's bed

Tower Cranes

• Commonly used in construction for lifting heavy materials (steel, concrete, waste skips, generators)
• Tower cranes are tall, often hundreds of feet, with a sizeable reach
• Construction workers operate tower cranes on major construction sites

Offshore Pedestal Cranes

• Elevated pedestal-mounted lifting device used for materials and personnel transfer between marine vessels and structures
• Used for various tasks including unloading supplies, offshore installation, pipe transfer, handling materials on deck. and subsea installation
• Main equipment (winches, electrical/hydraulic units) are inside a house for protection and reliability
• Crane boom hoist runs from the crane house to the top of the crane boom to control boom lifting and radius.