There are a few ways to differentiate between crane types. One of the most common is whether the beams that the trolley runs down are I-beam or hollow profile sections.
In this guide we’ll take a closer look at these two types of crane to discover how they differ, what they’re used for, and which you should choose.
What is a hollow profile crane/light crane?
‘Light crane’ is a rather generic term that can be applied to a number of lifting devices. They are usually used for localised lifting over a workstation/work zone rather than wall-to-wall overhead gantry cranes, AKA workstation light crane systems.
Light crane systems feature hollow profile beams which, although lighter than I-beams, provide the highest strength-to-weight ratio of any crane system in the world. These ergonomic cranes are capable of lifting up to 2 tonnes and are safer and more efficient due to being lighter and easier to move.
The key feature of a hollow profile beam crane is that the hoist and bridge trolley travels within the hollow profiles, on nylon wheels with sealed bearings. This offers ultra-low rolling resistance: a force equal to just 1% of the suspended load’s weight is enough to move the trolley. The encapsulated system also keeps out more dust and debris, reducing maintenance.
What is an I-beam crane?
I-beam cranes can be thought of as the traditional workshop cranes. They are heavier and slower to move but very robust as they are made from heavy structural steel I-beams. I-beam cranes commonly lift 20-30 tonnes and even up to 200-300 tonnes in heavy industry.
Hoists and structural steel are both specified to meet the weight lift requirements. I-beam girders suit traditional steel-wheeled hoist trollies, which fit over and roll along the bottom flanges of the I-beam.
Similarly, I-beam jib cranes are heavier duty versions of hollow profile/light jib cranes. But for the sake of simplicity, in this article we’ll stick to talking about overhead cranes.
Light crane vs I-beam crane: the differences
Structure and design
Light cranes and I-beam cranes share more similarities than differences when it comes to structure and design. Both cranes can be freestanding or attached to an existing structure. Both feature a bridge that rolls along tracks. A trolley then rolls along the bridge carrying a chain hoist, which attaches to the load.
The only real differences are the use of hollow profile beams or I-beams, the size (heavy duty I-beam cranes are larger), and the power of the electric hoists (or in some cases manual hoists).
Performance
I-beam cranes are used for periodic heavier lifts (usually 2 tonnes and above), while hollow profile cranes are used for lighter, quick or repetitive lifts of up to 2 tonnes.
This means light/hollow profile cranes are usually used for quick or repetitive movement of materials over localised work zones and I-beam cranes tend to be used for wall-to-wall overhead gantry cranes that cover the entire workshop floor.
Applications and uses
Both types of overhead crane are tasked with completing lifts in a dedicated location. Light cranes are a more common sight in small workshops, assembly lines, production facilities and warehouses. I-beam cranes are seen in steel mills, shipping yards, large construction sites, heavy machinery manufacturing and railway maintenance facilities.
Choosing the right crane for your needs
When choosing between a hollow profile/light crane or an I-beam crane, consider:
- Load capacity: The weight of the loads you need to move.
- Span and footprint: The distance you need to move those loads.
- Lift height: The dimensions of loads and the height of your ceiling.
- Duty cycle: The workload the crane will need to handle.
- Environment: The conditions the crane will need to work in.
Helping New Zealand manufacturers safely solve their lifting challenges with the best local and global solutions
At Stratalign we’ve spent years helping Kiwi businesses identify and secure the lifting equipment they need. Our team has the knowledge and expertise you need to identify the ideal crane system for your situation – the type that can make your business safer, more efficient and more productive.
We offer a complete range of light and I-beam cranes, all of which are certified to AS 1418.1.
