Overhead CranesConsiderations and Applications

by Craig PelkolaApplications Engineer

North American IndustriesBoston, Massachusetts, USA

Agenda• What is a Crane?

• Main Considerations

• Types of Cranes

• Electrification and Controls

• Interfaces

• Clearances

• Runways

• Below the Hook Lifting Devices

• Questions?

What is a Crane

• Cranes are made up of:– Hoists– Trolleys– End Trucks– Runways

Considerations

• Main Considerations– What does the crane need to accomplish– Capacity– Duty Cycle– Power Supply– Environment

Types of Cranes

• Types of Cranes and Their Uses– Fixed Hoists– Monorails– Jib Cranes– Bridge Cranes– Gantry Cranes– Special Cranes

• Fixed Hoist Types of Cranes

• Monorails Types of Cranes

• Jib Cranes– Wall Mount– Free Standing

Types of Cranes

• Bridge Cranes– Single Girder– Double Girder

Types of Cranes

• Single Girder Bridge Cranes

Types of Cranes

• Double Girder Bridge Cranes Types of Cranes

• Gantry Cranes

Types of Cranes

• Special Cranes– Single Legged Gantry– Trackless Gantry– Specific Handling Needs– Polar Cranes– Special Lifting Needs

Types of Cranes

• Gantry Cranes – Single-Legged Gantries Types of Cranes

• Special Cranes - Trackless Gantries Types of Cranes

• Special Cranes – Specific Handling Needs Types of Cranes

• Special Cranes – Polar Crane Types of Cranes

• Special Lifting Needs

Types of Cranes

Crane Electrification and Controls

• Crane Electrification and Controls– Electrification– Motor Controls– Human Interfaces– Other Interfaces

Crane Electrificationand Controls

• Electrification– Generators– Cable Reels– Festoon Systems– Conductor Bar

Electrification• Generators

Electrification• Cable Reels

Electrification• Festoon Systems

Electrification• Conductor Bar

Crane Electrificationand Controls

• Controls– Single Speed– Two Speed– Variable Frequency Drive (VFD)

Controls• Motor Controls

Human Interfaces

• Interfaces used to control cranes– Push Button Pendant– Radio Control– Cab Control– Automated Control

Human Interfaces• Push Button Pendant

Human Interfaces• Radio Control

Human Interfaces• Cab Control

Human Interfaces• Automated Control

Other Interfaces

• Safety Interfaces– Hoist Limit Switches– Weight Overload Switch– Travel Limit Switches– Collision Avoidance Systems

Clearances• Spans, Approaches, and Headroom

Clearances• Hook Height

Clearances

Runways• Types of Runways

Runways• Types of Runways

– Top Running– Under Running

Runways• Top Running and Under running Clearances

Runways

• Rails– ASCE rail vs 2x2 bar:

• Cost• Wear Characteristics• Stiffening properties

Below the Hook

• Below the Hook Lifting Devices

Questions?

• Questions and Answers

Feel free to email me any questions you might have:

craigp@naicranes.com

Gracias!

Thank you very much for attending my talk on overhead cranes.

Craig Pelkolacraigp@naicranes.com

North American Industries