An overhead crane is an investment that lasts for years, sometimes decades. But what if your production process changes, your loads become heavier, or your workspace grows? The question quickly arises whether adapting or expanding is a realistic alternative to full replacement. In many cases, the answer is yes. In this article, we answer the most frequently asked questions about expanding and modifying an existing overhead crane.
Can an overhead crane be expanded after installation?
Yes, in many cases an overhead crane can be expanded after installation. Whether it involves a longer runway, an additional hoist unit, or increased lifting capacity, expansion is technically feasible as long as the existing structure and the building framework allow for it. A thorough technical inspection beforehand is always the first step.
Not every expansion is equally straightforward. Feasibility depends on the age of the system, the condition of the steel structure, the available space in the facility, and the specifications of the original installation. An overhead crane that was originally designed with future expansion in mind is naturally better suited to modifications than a fully custom, one-off solution.
What is clear is this: modification is rarely a standardized process. Every situation requires a specific technical assessment before any conclusions can be drawn about what is achievable.
What modifications are possible on an existing overhead crane?
The most common modifications to an existing overhead crane include increasing lifting capacity, extending the runway or span, replacing or upgrading the hoist unit, modernizing the electrical installation and controls, and adding safety features such as overload protection or frequency inverters.
In addition to these technical modifications, operational improvements are also possible. These include:
- Upgrading to wireless operation or remote control
- Integration of software-controlled systems for more precise positioning
- Adding a second hoist unit for tandem lifting
- Adjusting travel speed for more efficient workflows
- Extending the bridge girder to increase the working zone
The electrical and mechanical components of an overhead crane age faster than the steel structure. For this reason, an electrical upgrade often provides a cost-effective way to significantly improve an existing crane without replacing the entire installation.
When is it better to modify a crane than to replace it?
Modification is generally the better choice when the steel structure is still in good condition, the desired changes are limited in scope, and the cost of modification is significantly lower than full replacement. Replacement only becomes truly relevant when the structure has been compromised, the crane can no longer meet current standards, or the required capacity far exceeds the original design.
A practical rule of thumb: if modification costs amount to more than 60 to 70 percent of the replacement value, a new overhead crane becomes the more financially attractive option. However, the decision is not purely financial. Production continuity, lead times, and the availability of spare parts all play a role as well.
Companies that have been using their crane system for more than twenty years sometimes deliberately opt for a phased approach: first a refurbishment and upgrade, and later a full replacement if needed. This extends the lifespan of the investment without risking production downtime.
What does the process of modifying an overhead crane involve?
Modifying an overhead crane always begins with a technical inspection and a detailed assessment of the existing situation. This is followed by an engineering phase in which the modification is designed and verified against applicable standards. Components are then manufactured or procured, after which the modification is carried out on-site and the crane is retested and recertified.
In concrete terms, the process looks as follows:
- Inspection and assessment: The existing structure, electrical installation, and mechanical components are thoroughly examined.
- Engineering and drawings: The modification is developed by the engineering team, taking into account loads, standards, and practical feasibility.
- Work preparation and planning: Execution is scheduled to minimize disruption to production.
- On-site execution: Certified technicians carry out the modification at the client’s facility.
- Testing and certification: After the modification, the crane is fully tested and certified by an accredited inspection body.
We manage this process from start to finish, with a single point of contact for all communication, planning, and coordination.
What safety and certification requirements apply after a modification?
After any significant modification to an overhead crane, a new inspection is mandatory. In the Netherlands and Belgium, this is required under the Machinery Directive and occupational health and safety legislation. Following modification, the crane is treated as an altered machine and must once again comply with all applicable standards, including NEN-EN 15011 for overhead cranes.
The inspection typically covers:
- Visual inspection of the structure and connections
- Functional testing of all movements and safety devices
- Load test with the rated load and a test load
- Verification of the electrical installation and earthing
- Review of documentation and the maintenance logbook
As an accredited inspection company, we can handle both the modification and the subsequent inspection and certification. Upon successful certification, you will receive an inspection report confirming that the overhead crane may be safely put into service in accordance with applicable standards.
What are the costs of expanding or modifying a crane system?
The costs of modifying or expanding an overhead crane vary considerably and depend on the nature and scope of the modification, the condition of the existing installation, and the engineering required. A straightforward electrical upgrade costs significantly less than a structural extension of the runway or an increase in lifting capacity.
Factors that determine the costs include:
- The complexity of the technical modification
- The engineering time and drawing work required
- The cost of materials, components, and any new steel structures
- On-site installation time and the impact on production
- Certification costs upon completion of the modification
An accurate cost estimate is only possible after an on-site technical assessment. What we can say is this: in many cases, modification is considerably more cost-effective than commissioning an entirely new overhead crane, especially when the steel structure is still in good condition. An honest, tailored recommendation based on your specific situation is always the starting point.
How BKRS helps with expanding or modifying your overhead crane
BKRS guides companies through the entire process — from technical inspection to final certification — when modifying or expanding an existing crane system. Whether it involves an electrical upgrade, a capacity increase, or a structural extension of the runway, BKRS works with in-house engineers, certified technicians, and an accredited inspection body, all under one roof.
What BKRS does for you:
- Technical inspection and on-site assessment of the existing situation
- Engineering and custom drawings in accordance with applicable standards (including NEN-EN 15011)
- Execution by certified technicians with minimal disruption to production
- Full certification and inspection reporting upon completion of the modification
- A single point of contact for the entire project, from quotation to handover
Would you like to know whether your existing overhead crane qualifies for modification or expansion? Contact BKRS for a no-obligation technical consultation at your site.
Frequently Asked Questions
How long does it typically take to modify an overhead crane?
The lead time depends heavily on the scope of the modification. An electrical upgrade can be completed within a few days, while a structural expansion such as a longer runway may take several weeks. During the planning phase, execution is always scheduled to keep production downtime as short as possible.
Can my existing overhead crane be modified if the brand or model is no longer available?
Yes, in many cases this is still possible. Our engineers assess the existing structure and select compatible components from current suppliers. As long as the steel structure is structurally sound, an outdated brand or model is rarely an insurmountable obstacle.
Is a modification still possible if the crane has not been inspected for years?
Yes, but in that case the process always begins with a comprehensive inspection to fully document the current condition of the installation. Any outstanding maintenance issues are then incorporated into the approach, ensuring that the crane fully complies with applicable standards and certification requirements upon completion.
What is the difference between a refurbishment and a modification of an overhead crane?
A refurbishment focuses on restoring and replacing worn components to bring the crane back to its original condition, without changing its specifications. A modification goes a step further by altering or improving the crane's capacity, functionality, or configuration. Both approaches can be combined for an optimal result.