Today, May 15th, MAXTECH's factory invist a surveyor from Bureau Veritas (BV) to witness a full factory load test on a 20ft semi‑automatic container spreader. This spreader was custom‑built for a client with a rated capacity of 20 tonnes. However, MAXTECH designed and manufactured it with an actual lifting capacity of 40 tonnes – meaning that at 20t working load, the safety margin is 100%. All tests were passed in one go, and the spreader will soon be shipped to the customer’s destination.
Why Did the Client Choose a Custom Spreader from MAXTECH?
As a company named “Top Marine Crane and Port Equipment Manufacturer in Asia 2025”, MAXTECH not only supplies complete marine cranes, ship‑to‑Shore Cranes, and mobile harbour cranes (MHC) , but also excels in designing and manufacturing core attachments such as container spreaders and grabs in‑house.
The 20ft semi‑automatic container spreader delivered this time was specifically designed for container vessels on a certain trade route. Although the client’s rated requirement was only 20t, MAXTECH took into account the dynamic impact loads that a deck crane may encounter during actual operation, as well as the trend of increasing container weights in the future. Therefore, we proactively raised the design basis to 40t. After rigorous 125% dynamic load and 150% static load tests witnessed by BV, the spreader’s structure, welds, and twistlock mechanisms performed perfectly – the safety margin was fully validated.
20t Rated, 40t Capability – MAXTECH's “Safety Culture”
On the test day, the BV surveyor followed the Factory Load Test Outline and inspected:
- Dimensions and weld quality – All dimensions matched the drawings; no cracks, no missing welds; paint intact.
- No‑load function test – Smooth opening and closing; four twistlocks synchronously rotated 90° without jamming.
- Load test – Using calibrated load cells and test weights, we performed rated load, 125% dynamic load, and 150% static load tests. Deflection remained well within allowable limits, and no permanent deformation remained after unloading.
The surveyor commented while signing the test report: “MAXTECH’s spreader has a real capacity far exceeding the nameplate value. This demonstrates a strong commitment to customer safety. I am confident to issue the certificate.”
Which Cranes Can This Spreader Work With?
Thanks to its standard ISO spreader interface and universal control system, this 20ft semi‑automatic spreader can be used with almost any marine deck crane, mobile harbour crane (MHC), or Rail movable crane. Whether for a newbuilding vessel or a terminal upgrade, it can be put into service quickly with simple electrical matching.
Moreover, MAXTECH has full design and manufacturing capability for 40ft container spreaders, non‑standard sizes (e.g., 45ft, 53ft) , and even electric spreaders. Our electric spreaders use servo motors for twistlock actuation and telescoping mechanisms, offering faster response – ideal for automated terminals and remote‑control operations.
Ready for Shipment – Global Support
With the BV test certificate issued, this 20ft semi‑automatic spreader has been packed and will soon be shipped by sea to the client’s destination. MAXTECH will also provide a complete package of operation manuals, maintenance guides, and spare parts lists in both Chinese and English, ensuring smooth site installation and long‑term support.
If you are looking for a high‑reliability, high‑margin, customisable spreader for your vessel’s crane, or need to upgrade an existing spreader to electric or intelligent operation, please contact the MAXTECH team. We will provide an integrated “crane + spreader” solution tailored to your vessel type, crane parameters, and working conditions.
Post time: May-15-2026
