Yes, the track of a KBK system can in many cases be modified at a later stage. Whether it involves extending, rerouting, or a completely new layout: KBK rail systems are modular in design, making modifications technically feasible without having to replace the entire system. However, factors such as the existing structure, the desired capacity, and the building situation play a decisive role. In this article, we answer the most frequently asked questions about modifying a KBK system.
What are the technical options for extending a KBK track?
A KBK rail can in most cases be extended by adding extra rail sections to the existing system. Because KBK systems use standardized profiles and connecting elements, an extension connects seamlessly to the existing track. The lifting capacity and the structural load-bearing capacity of the suspension points determine whether further modifications are needed.
When extending a KBK track, there are a number of technical aspects that require attention:
- Supporting structure: The existing suspension points or columns must be able to absorb the additional load. If that is not the case, additional support points are installed.
- Rail profile: The rail profile used (KBK I, II, or III) determines the maximum span per section and the permitted load. For a larger span or higher capacity, a heavier profile may be required.
- End stops and safety components: After extension, end stops and buffers are repositioned and checked.
- Electrical installation: Festoon cable guides or conductor rails are incorporated into the extension.
An extension of the KBK rail is therefore one of the most common and relatively straightforward modifications to a light crane runway. As long as the building situation permits it and the rail type matches, expansion is readily achievable.
Can a KBK system also be converted to a different direction of travel or layout?
Yes, a KBK system can be converted to a different direction of travel or a different layout. This can range from adding a cross-travel unit or workstation to a complete redesign of the track structure. The modular design of KBK rails makes this possible, although a significant layout change requires a thorough technical analysis beforehand.
Common layout modifications include:
- Adding a cross axis: An additional direction of travel is realized by combining an overhead main track with an underlying cross-travel unit.
- Connecting multiple tracks: Two separate KBK tracks can be merged into one continuous system, covering a larger work area.
- Modifying the suspension structure: With a different layout, the positions of the suspension points change. This requires recalculation of the structural load.
- Adding a workstation or monorail: An additional branch or loop can be added to an existing system for specific workplaces.
A complete layout change is more complex than a simple extension, but certainly feasible. It is advisable to have the new situation calculated by a specialist first, so that the structure remains safe and complies with the applicable standards.
What factors determine whether a modification is technically feasible?
Whether a modification to a KBK system is technically feasible depends on four main factors: the load-bearing capacity of the existing structure, the type and age of the current rail profile, the structural possibilities of the space, and the desired new situation. Together, these factors determine whether modification is realistic or whether a new system is the better choice.
Below is an overview of the most decisive factors:
- Structural load-bearing capacity: Can the existing columns, ceiling beams, or suspension points handle the new load? This is often the first and most critical checkpoint.
- Rail type and condition: Older or heavily worn rails are sometimes no longer suitable for modification. An inspection provides insight into the remaining service life.
- Available space: The clear height, the width of the hall, and the presence of obstacles determine what is physically possible.
- Desired lifting capacity: If the new situation requires a higher capacity, the entire system must be recalculated and possibly reinforced.
- Electrical infrastructure: Changes to the track often bring modifications to the power supply and control system.
A thorough inspection of the existing system is always the first step in assessing feasibility. Based on that inspection, a well-considered decision can be made.
Does a modified KBK system need to be re-inspected?
Yes, a modified KBK system must always be re-inspected before it is put back into service. This is legally required under the European Machinery Directive and Dutch occupational health and safety legislation. Any substantial modification to a crane system is regarded as a new commissioning, which requires a full inspection.
The re-inspection generally covers the following elements:
- Visual inspection of the rail connections, suspension points, and structural elements
- Load test with the maximum working load
- Check of the electrical installation and safety components
- Assessment of the documentation and technical specifications of the modified system
After a successful inspection, the user receives an inspection report and a valid inspection certificate. The regular annual inspection obligation then applies again. It is therefore advisable to schedule the inspection directly as part of the project, so that the system can be put into service without delay.
When is it better to have a new KBK system built instead of modifying an existing one?
A new KBK system is the better choice when the required modifications are so extensive that the costs and risks of conversion are higher than the investment in a completely new system. This is especially the case when the existing structure cannot handle the new load, the rail profile is outdated, or the desired situation differs fundamentally from the current setup.
Signals that a new system is preferable:
- Severe wear or corrosion on the existing rail or suspension structure
- Significantly increased lifting capacity that the current rail type does not support
- Completely different hall or location to which the system needs to be relocated
- Outdated electrical installation that no longer meets current safety standards
- High conversion costs amounting to more than 60 to 70 percent of the price of a new system
In cases where conversion is technically possible but not economically viable, new construction is the wisest long-term investment. A specialist can, based on an inspection and quote, place both options side by side so that the choice is well-substantiated.
How BKRS helps with modifying or expanding your KBK system
We guide the entire process of a KBK system modification: from the initial technical assessment to the final inspection and commissioning. Whether it involves extending a KBK rail, converting to a new layout, or assessing whether a new system is the better choice, we think along actively and ensure a solution that fits your situation precisely. What we can do for you:
- Technical inspection of the existing crane system and assessment of the modification options
- Design and engineering of the new or expanded track configuration
- Complete realization: from structural and electrical installation to on-site assembly
- Inspection and certification upon completion of the modification
- Annual inspection and long-term maintenance
With more than forty years of experience in designing and building crane systems, we know exactly where the challenges lie when modifying a light crane runway. Would you like to know what the options are for your situation? View our services or contact us directly for a no-obligation consultation.
Frequently Asked Questions
How long does it take to modify or extend a KBK track?
The lead time depends on the scope of the modification. A simple extension can often be completed within one to two days, while a complete layout change may take several days. A specialist can draw up a realistic schedule after a technical inspection.
Can I modify my KBK system while production continues?
In many cases it is possible to carry out modifications in phases, so that business operations are disrupted as little as possible. This does require good planning and coordination in advance. Discuss this with your contractor so that the work is scheduled at times with the least production impact.
What does modifying a KBK system cost on average?
Costs vary greatly depending on the nature and scope of the modification. A small extension is considerably cheaper than a complete layout change with new suspension structures. As a rule of thumb: when conversion costs amount to more than 60 to 70 percent of a new system, new construction is financially more sensible.
How do I know whether my existing KBK rail is still suitable for modification?
A technical inspection by a certified specialist provides conclusive information about the condition of the rail profile, the suspension points, and the electrical installation. Based on that inspection, it is determined whether modification is responsible or whether replacement is the better choice. It is advisable to always carry out this inspection as the first step.