Why Choose Test Weights from Tenwinkel? – Your Advantages at a Glance
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Standards-compliant & certified:
Tenwinkel’s crane test weights comply with all relevant regulations and standards (e.g. DIN, ISO, DGUV). Every unit is quality-checked to ensure dependable safety testing.
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Modular & flexible:
From small to heavy weights – our modular system covers 5 kg to 165 t. You can flexibly combine test weights to achieve the exact test load required. Ideal for various crane movements and testing scenarios.
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Certified manufacturing:
roduced using certified processes (e.g. ISO-tested welding procedures). High-strength heavy concrete ensures durability. Our documented quality (test protocol, structural data, conformity declaration) provides full traceability of each weight’s nominal value.
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Fast availability:
Tenwinkel manufactures each test weight individually to customer specifications. Thanks to our coordinated modular production, your test system can be delivered within just a few weeks. For urgent needs, please contact us at the time of ordering. Rental systems for demonstration purposes are also available as a fast alternative.
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Customized solutions:
Need specific dimensions, coatings, or markings? We offer custom formats, personalized labeling (e.g. your logo), preferred coatings, and specialized finishes like polyurea thick-layer coating. Due to material characteristics, our concrete / heavy concrete weights are not calibratable. If you require calibratable weights, please reach out to us directly.
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Fully equipped:
Our test weights are delivered ready to use with all necessary equipment. Integrated lifting eyes for crane slings, forklift pockets for transport via forklift or pallet jack simplify handling. Optional transport frames or pallets are available for safe storage, along with stacking aids for space-saving storage.
Typical Application Areas for Crane Test Weights
Our crane test weights are used in a wide range of industries. Common applications include:
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Regular crane and hoist inspections in accordance with DGUV regulations (UVV): For example, recurring inspections (110%) of overhead and gantry cranes. Operators must verify the load-bearing capacity of their cranes at defined intervals. With our weights, these crane tests can be carried out efficiently, allowing your crane to be quickly put back into operation.
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Overload tests (+25%) for new installations (crane commissioning): Before a crane system is put into service for the first time, standards and torsion specifications require an overload test with 125% of the nominal load. Our test weights make these load tests possible – whether for bridge or gantry cranes. You’ll meet all requirements for official commissioning inspections by a certified expert.
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Load trials in mechanical and plant engineering: In development and production environments, test weights are used to apply defined loads to machine components or structures. Whether for quality assurance, validating static calculations, or fine-tuning vibration dampers – modular weights support all types of load testing. Specific requirements such as bending and torsional stress tests can thus be simulated under realistic conditions.
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Quality assurance and expert acceptance inspections: Official load approvals and safety tests (e.g., after repairs or modifications) require reliable test loads. Our weights serve as dependable tools for inspectors and certified experts, enabling verification of braking behavior and crane stability under full load. With Tenwinkel test weights, you’ll pass every inspection safely and efficiently, ensuring full compliance with all relevant standards.
Price Comparison: Concrete vs. Steel Test Weights
Another key factor: costs. At Tenwinkel, we rely on high-quality concrete test weights, which offer clear cost advantages over pure steel. The following example illustrates the difference – concrete is approximately 50% more affordable than steel:
By purchasing concrete test weights from Tenwinkel, you benefit from lower acquisition costs and a durable product. Thanks to their robust construction and weather resistance, our weights are suitable for a wide range of environments – whether in workshops, on construction sites, or offshore installations. On request, we also organize shipping and transport, ensuring that your order arrives quickly and safely.
Beton / Concrete | Stahl / Steel | |
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approx. price per kg | approx. 1 EUR - 2 EUR | approx. 2 EUR - 5 EUR |
Cost for 1,000 kg | approx. 2,000 EUR | approx. 5,000 EUR |
Cost for 20,000 kg | approx. 20,000 EUR | approx. 40,000 EUR |
Note: These are indicative reference values. Actual prices may vary depending on design. Heavy concrete is not only cheaper, but also rust-free and doesn’t require expensive alloys. In addition, concrete weights are less attractive to thieves (no high scrap value like steel). You receive a cost-efficient and secure solution for your load testing needs.
What Are Crane Test Weights Used For?
Test weights for crane systems are essential for performing legally required load and overload tests. Technical managers and plant supervisors in crane and systems engineering understand how critical such test loads are to ensure operational safety – they are the only way to verify the safe operation of your crane system. With the appropriate test weights, real-world load trials can be conducted, such as in tension and compression, to verify the load-bearing capacity and stability of cranes and lifting equipment. This enables companies to fulfill safety-related inspections (e.g., annual UVV tests) reliably and ensures full compliance with occupational safety regulations.
Tenwinkel provides robust, modular crane test weights – from 5 kg to 165 t – reliably from a single source and available for purchase. That means: a wide selection of test weights is available to suit your specific needs, whether for small workshop cranes or large heavy-duty lifting equipment. All weights meet safety standards (in line with current accident prevention regulations) and are optionally available with +10% overload capacity. This ensures compliance even with the most demanding testing requirements, offering the necessary buffer for overload tests in accordance with industry standards. Operators can therefore carry out recurring inspections of their cranes and lifting gear professionally and fully meet all crane inspection requirements. All of our test weights and test systems are protected by registered utility models.
In short: With Tenwinkel test weights, you are investing in safety, efficiency, and reliability. Instead of renting expensive weights every year, you have your own equipment on-site – always ready to use, with no waiting time or logistical complexity. Our solutions are technically sound, field-tested, and tailored to your needs.
According to DGUV Principle 309-001, all crane operators are required to perform regular inspections of their crane systems. For this purpose, we offer our utility model-protected system.
These systems consist of various plates, each equipped with four integrated threaded inserts for safe lifting.
Two short and two long locking pins secure the test plates during lifting operations. A lifting beam with two certified safety lifting points distributes the lifting forces via a 2- or 4-leg chain sling to the crane hook.
The plates are connected to the beam and to each other using two square tubes and the locking pins.
The test plates are easily stacked using a forklift or crane. Integrated centering cones ensure precise alignment between the plates. All metal parts are primed and coated in signal red (RAL 3020), while all concrete plates are finished in light grey (RAL 7035). The weights are cast with integrated weighing and comply with a tolerance of -0 / +2.5%.
Please note: these weights are not suitable for legal-for-trade calibration.
Purchasing Crane Test Weights – Your Investment in Safety and Efficiency
If you regularly need test weights, purchasing them instead of renting is a smart decision. Having your own crane test weights offers many advantages:
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Long-term availability:
Your test weights are always on hand – ideal for recurring inspections and unplanned safety checks. No more waiting for available rental weights or relying on external providers. This saves time and hassle during equipment maintenance (time savings through eliminated logistics).
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Investment security & utilization:
Once purchased, the weights can be used for a wide range of load tests – whether for annual UVV inspections, acceptance tests of new crane installations, or load tests after repairs. You're investing in the safety of your operation and ensuring optimal utilization of your equipment. When needed, the weights can also be passed on within the company or used across multiple projects. Thanks to our modular system, the test weights work like building blocks – they can be flexibly expanded and adapted at any time.
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Tailored to your needs:
Our modular systems can be customized to your requirements. Individual weight units are combined to form the desired total load. We also offer compatible accessories such as transport trolleys or trailers for easy transport and interim storage. This allows you to configure a test weight set that fits your crane system and your inspection needs precisely. The various modules also make it possible to simulate different load conditions, e.g. to realistically test vibrations or braking behavior under load.
Request a consultation now
Tenwinkel GmbH & Co. KG
Max-Planck-Str. 31
48691 Vreden
+49 (0) 2564 - 39 49 38-0
Technical Data and Features of Tenwinkel Test Weights
Our test weights stand out through well-engineered design and premium manufacturing. Here are the most important technical specifications and features at a glance:
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Weight ranges:
Available as single weights and modular systems with a total weight of 5 kg to 165 t. This allows for both precision testing in low ranges (a few kilograms) and heavy-load testing in the hundreds of tons.
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Material:
Manufactured from high-strength concrete or heavy concrete with high density. We also offer steel weights if required for specific applications – we’ll be happy to advise you.
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Formats:
Various formats are available depending on your needs, including 0.8 × 1.2 m, 1.0 × 1.5 m, and 1.5 × 2.0 m (all weights are stackable), flat slab weights, compact block modules, and custom shapes on request. This variety allows for ideal adaptation to your application and simplifies handling during setup and dismantling.
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Handling & transport:
All Tenwinkel test weights feature integrated lifting eyes (crane lugs) and forklift pockets. This means you can lift the weights safely with a crane and position them precisely, or move them easily using a pallet jack or forklift. For transport around the facility or storage, we offer optional transport trolleys and pallet solutions, allowing you to store and deploy your test loads securely and efficiently.
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Documentation & compliance:
Every test weight includes an operating manual with information on its exact nominal value (target weight) and production tolerance. Of course, we also provide the necessary declaration of conformity and comply with all relevant regulations.
For more technical details (such as dimensions, density classes, fastening points, etc.), feel free to contact us. Our experts will gladly provide all the relevant information to help you choose the perfect product for your requirements.
Modular Beam System – Flexible Test Loads up to 165 t
A main beam with four sub-beams forms the core of our modular system – enabling you to assemble test loads ranging from 11 t to 165 t from standard modules measuring 1.5 × 2.0 m. The total footprint of a fully loaded system is only around 4.5 × 7.3 m, allowing even heavy-load testing to be carried out safely and space-efficiently. Locking pins secure the test plates in place, conical centering guides allow quick alignment, and the load-distributing safety lifting points reliably direct all forces to the crane hook.
Tolerances & Quality Assurance
All concrete plates are cast with integrated scales and meet a narrow tolerance of −0 / +2.5% – ideal when you require precise test loads for UVV checks, acceptance tests, or 110% overload inspections. While these weights are not certifiable for legal-for-trade use, factory weighing ensures repeatable load values and thus compliant test results.
Reference Projects – Tenwinkel Test Weights in Action
Many customers from various industries rely on Tenwinkel. Our test weights are in use worldwide – here are two real-world examples:
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Test weights for bridge cranes at a chemical production site (Lanxess, North Rhine-Westphalia): In a specialty chemicals facility in North Rhine-Westphalia, Tenwinkel test weights are regularly used for the UVV inspection of hall and bridge cranes. Thanks to tailor-made compact modules, the tight space in the production hall could be used efficiently. The crane tests can now be performed more quickly and on schedule, making production both safer and more efficient.
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Overload test for an offshore gantry crane (Green Wind Offshore GmbH): For the commissioning of a large gantry crane in an offshore environment, several tons of test weights were needed. Tenwinkel delivered a modular weight system including transport equipment to the coast on time. The subsequent 110% load test at sea was completed successfully – the crane passed. The client was impressed by the rugged construction and the ease of handling our weights under harsh offshore conditions.
These examples demonstrate: Whether in an industrial hall or under demanding outdoor conditions – Tenwinkel delivers test weights that stand up to real-world challenges. Our solutions prove themselves daily and help our clients enhance both safety and efficiency.
Tenwinkel system test weight
Here are examples of what your crane testing system could look like:
1.1t to 16.5t / 1500 x 2000 mm
This utility model-protected test weight system consists of eight coordinated test plates (2x 1100 kg, 1300 kg, 2000 kg, and 4x 2750 kg, tolerance -0+2.5%). Each plate has four M30 threaded inserts cast for safe lifting. The following cranes can be tested with a 10% overload.
1,000 kg = 1,100 kg
2,000 kg = 2,200 kg
3,200 kg = 3,500 kg
5,000 kg = 5,500 kg
7,500 kg = 8,250 kg
10,000 kg = 11,000 kg
12,500 kg = 13,750 kg
15,000 kg = 16,500 kg
Rated load / Test load
Crane testing system
1.1t to 5.5t / 1000 x 1500 mm
This utility model-protected test weight system consists of four coordinated test plates (2x 1100 kg, 1300 kg, and 2000 kg, tolerance -0+2.5%). Each plate has four M24 threaded inserts cast for safe lifting. The following cranes can be tested with a 10% overload.
Rated load / Test load
1.000 kg = 1.100 kg
2.000 kg = 2.200 kg
3.200 kg = 3.500 kg
5.000 kg = 5.500 kg
Optional with trolley
The optional undercarriage allows for flexible handling of the 16.5t with a small 2t forklift. You can reach almost every angle of the testing area and maneuver safely in any space.
Further trolleys can be seen in the gallery.
Custom crane testing systems
We can also customize test weights to suit your needs.
Do you have limited forklift capacity and therefore require lighter individual weights?
Or do your access points only allow for certain external dimensions?
Or do you require testing systems above 16.5t?
Based on our test weight systems, we can configure various coordinated test plates. Each plate has four threaded inserts cast for the safe lifting of the total test load. Two short and two long pins secure the test plates during lifting. The test plates are connected to each other through various crossbars, square tubes, pins, and shackles. The test plates can easily be stacked using a forklift/crane. Cones can be integrated into the plates to center them with each other. The design can be customized through our own mold construction and painting process.
Individual weights up to 30t are currently achievable. Assembled systems will be tested for manufacturability.“
Let me know if you need any adjustments or further assistance!
If you have any further questions, feel free to contact us!
Some references
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