Munck Cranes International Logo

Overhead Bridge Crane Components

Diagram & Guide to Overhead Cranes

Get a basic understanding each component of a bridge crane for the safe and efficient operation, and when it comes to maintenance, upgrades, and new installations. This guide breaks down the core elements of a bridge crane system, from the structural framework to the mechanical parts that work with lifting and moving heavy loads.

To purchase crane parts and components, click our overhead crane parts page.


Overhead Crane Diagram

Overhead Cranes Components Chart

The Bridge

The bridge is made up of either a single girder or a double girder (depending on the requirements and configuration) with a set of end trucks at both ends. The bridge spans across the width of your bay or facility and this travelling section is the main support structure of your overhead crane.

End Trucks

Bridge crane end trucks are positioned on both sides of the span, where the bridge wheel assemblies are housed. This allows the whole crane to travel along the complete length of the bay or structure. The wheel assemblies of the bridge end trucks travel along rails which are mounted to the runway beams or rails.

Crane Girders

The crane girder or girders are connected to the end trucks and they are the structure by which the trolley is supported. Girders are the large horizontal boxes or beams and are considered to be a principal element of the overhead crane system.

Trolley Hoist

This component is a combination of the hoist and the frame of the trolley. In dual hoist applications, two hoists can either be mounted to a single trolley frame or two trolley frames can be manufactured each with independent hoists.

Crane Trolley

The bridge crane trolley rides across the span of the bridge along the girder or girders and carries the hoist.

Crane Hoist

The hoist is designed to lift and lower the desired load and is fixed to the trolley frame using either a hook an/or custom lifting attachment to support the load. You have the option of two hoist models; a Munck electric wire rope hoist or an electric chain hoist.

The wire rope hoists manufactured by Munck are safe, dependable, durable, and are designed for year of long term use. Chain hoists on the other hand are designed for lower capacity operations and ideal for light duty requirements or new projects where price is a strong factor when selecting the proper lifting equipment.

Crane Component FAQ

This FAQ answers some common questions about crane components. We advise that you read this FAQ before downloading your guide.

A bridge crane typically consists of the bridge, end trucks, girders, trolley, hoist, and a control system, among other smaller components. Each part plays a crucial role in the crane's overall function.

The girder provides the structural support needed for the trolley and hoist, allowing them to move across the crane's span.

End trucks are positioned on either side of the crane span and house the wheel assemblies, enabling the crane to move along its designated path.

Wire rope hoists are generally used for heavier lifting and are more durable, while chain hoists are more suitable for lighter loads and are typically more cost-effective.

The trolley moves along the girder and carries the hoist, which lifts and lowers the load.

Crane controls can vary, ranging from pendant stations to wireless radio controls and more sophisticated control panels with automation capabilities.

Common safety features include overload protection, limit switches, and emergency stop functions.

Inspection schedules can vary based on usage, but frequent checks for wear and tear are advisable, along with periodic in-depth inspections by qualified personnel.

Temperature, humidity, and corrosive environments can all impact the longevity and functionality of crane parts.

Many suppliers offer customization options for specific components to suit your operational needs.

Load capacity, lifting speed, and duty cycle are key factors to consider when choosing a hoist.

The rope drum is where the wire rope is wound, aiding in the lifting and lowering actions of the crane.

Signs like increased noise, decreased performance, and visible wear and tear can indicate that a component may need to be replaced.

For high-quality, reliable crane components, you can click our crane parts page.

Munck Cranes Can Help

Download Our Crane Components Guide

Some fields are required



Before You Invest in Material Handling Equipment, Talk to Munck Cranes!

Head Office
  • ©2024 Munck Cranes Inc.
    403 Dewitt Road
    Stoney Creek, On
    L8E 4B9
24/7 Emergency Service

For 24/7 Emergency Services simply call now at 800-461-4509

Social Contacts