In today’s factories, every inch of space counts! Often, obstacles or a lack of space make certain manipulations difficult, forcing companies to modify their methods, resulting in additional costs. That’s why, when I talk to customers, they often ask me how they can increase their lifting height.
Premium Industrial Group has been supporting its customers for over 15 years in the design and installation of overhead cranes. We tailor our lifting solutions to each customer’s available space. So, is it possible to increase the lifting height of an overhead crane? In other words, what influences lifting height?
In this article, you’ll discover the 5 factors that influence lifting height. We’ll also clear up some misconceptions about what doesn’t affect lifting height. After reading, you’ll know exactly which solutions to choose to optimize your space, so that you can lift your loads without having to completely change your operations.
What factors influence lifting height ?
The following 5 elements directly influence lifting height. Knowing these elements will help you determine what you can change in your project to optimize the use of your overhead crane. That’s why we’ll take a look at each of these elements and what can be done to increase lifting height.
1. The clear height available
The clear height represents the height between the ground and the lowest obstruction above the track. This height indicates the highest point where the lifting equipment can be installed.
What can be done to increase it? If the object preventing the overhead crane from being installed higher up can be moved, this will increase the lifting height. Sometimes, it’s worth checking whether there’s a way of increasing the clear height. For example, if a garage door track is obstructing the runway, could it be installed higher or lower? See our article : Managing clearance and avoiding obstructions leads to unhindered installations
But in general, the available height determines the clear height. In this case, what else can you do?
2. The type of overhead crane
There are 2 main types of overhead crane : single girder and double girder.
Single girder overhead crane : This model has one girder on the runway track, with the hoist moving underneath. Lifting height is reduced by the size of the beam.
Double girder overhead crane : This overhead crane has two girders on the runway track, and the hoist moves over them. This enables the maximum lifting height to be reached. However, if the part to be lifted is very bulky, the beams can get in the way, and you’ll need to use accessories that reduce the height.
What can be done to maximize height : Opting for a double girder overhead crane increases lifting height but also increases cost by around 15 to 30%.
3. Girder type
There are different types of girders used to build an overhead crane. By using a wider but shallower girder, it is possible to increase the lifting height. For a longer span, the box girder’s width and height can be adjusted. However, in the case of a hoist traveling on top of a double-girder overhead crane, the girder thickness does not affect the hook height.
Beam or box girder frame
4. Hoist selection
Some hoists are specially designed to increase lifting height. Options are available for both wire rope and chain hoists. To make the right choice between a wire rope hoist and a chain hoist, see our article : Are wire rope hoists preferable to chain hoists? What are the differences?
Standard chain hoist Low headroom chain hoist Ultra‑low headroom chain hoist
Chain hoists : Some models, especially those with remote motors, allow the hook to be lifted higher. Standard, low headroom or ultra-low headroom versions are available.
Wire rope hoists : For wire rope hoists, the lifting height varies according to the chosen model. The sturdier the hoist, the heavier it lifts, but this also affects its cost and clearance.
5. Lifting accessories
Although the maximum hook height is an important parameter, the use of accessories such as slings or spreader bars can reduce the total lifting height (see the section “Lifting Height vs. Hook Height”). You can also check if installing an auxiliary hoist would completely eliminate the lifting accessory.
Lifting with a hook and a spreader beam vs. lifting with two hoists without a spreader beam
It is also wise to adapt accessories to minimize height loss, as these adjustments will generally be less expensive than changing the entire overhead crane. Do not hesitate to discuss your specific needs with your lifting accessories provider. If necessary, we can refer you to one of our specialized partners.
Example of an ultra-compact spreader beam
False beliefs : what doesn’t affect lifting height
There are some misconceptions about what actually influences lifting height :
1, The height of the track : Contrary to popular belief, the height of the runway track does not directly affect lifting height. The overhead crane components are what will be adjusted to maximize lifting height. For example, if the runway track is too low, girder risers can be added to raise the overhead crane.
2. The attachment of the end carriages : This refers to how the beam is connected to the crane wheel module. Modifying the connections of the end carriages depends on the height of the runway, and serves to adapt to the runway, not to increase the lifting height.
3. Compact double girder overhead cranes : Compact overhead cranes are equipped with low-profile girder or box-type structures. The hoist can be recessed between the two girders. The objective of a compact overhead crane is to free up space beneath the structure in order to facilitate movement above equipment such as fixed machinery, shelving, or a semi-gantry, for example.
However, since the girders can be raised to the highest point, the hook will be located at approximately the same position. This therefore does not, or only minimally, affect the lifting height.
By clarifying what influences lifting height, you can move ahead with your project with these elements in mind.
To get into action !
Understanding the factors that affect lifting height is the foundation of proper planning for an overhead crane project. Since several configurations are possible, the first step is to clearly define the actual requirements of the application.
Here are the steps to follow:
• Establish the minimum lifting height required for your operations.
• Ask a lifting specialist for standard overhead crane drawings so you can compare the base solution with the constraints specific to your operations.
• Determine the desired lifting height gain and, if needed, the clear height required under the crane structure.
Once this information has been confirmed, it becomes much easier to choose the configuration best suited to your needs at the best cost. It may also be worthwhile to check with your contractors to see whether the building can be adapted or whether certain existing installations can be modified.
Groupe Industriel Premium can support you at every stage by identifying the options that apply to your project and recommending the right solution. Contact a specialist to discuss your application and find the configuration best suited to your needs.
Click on <CONTACT A SPECIALIST> to speak with an expert who can help you with your project.
