How to Choose the Right Rubber Fender for High-Tidal-Range Ports
In our last article, “Why Do Rubber Expansion Joints Burst? Common Causes and Prevention”, we covered piping protection. Today, we return to the waterfront for a question that puzzles many port engineers: what fender works best when the tide rises and falls 6 meters or more? In ports with extreme tidal ranges—such as those in the UK, Canada, and Southeast Asia—solid fenders mounted at fixed elevations lose contact with vessels at low tide and may be submerged at high tide. The wrong choice leads to inadequate protection, vessel damage, and costly repairs. If you have ever asked “which fender is best for high tide ranges,” this article is for you. At Wuxi ChuncoTech Rubber, we manufacture both solid and floating fender systems, so we can recommend without bias. Here is how to choose.
The Problem with Solid Fenders in High-Tidal-Range Ports
A solid rubber fender bolted to a dock has a fixed elevation. The vessel, however, rises and falls with the tide. At high tide, the vessel may contact the upper part of the fender—or miss it entirely if the fender is too low. At low tide, the vessel may contact the lower part—or hit the dock directly below the fender.
The result: The vessel strikes the dock at extreme tides. The impact damages both vessel and structure. Operators then install multiple rows of solid fenders, increasing cost and complexity.
Floating Fenders: The Tide-Following Solution
Floating fenders—pneumatic (air-filled) or foam-filled—float on the water surface. As the tide rises, the fender rises with it. As the tide falls, the fender falls. The vessel always contacts the fender at the waterline—the strongest part of the hull.
Advantages for high-tidal-range ports:
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Tide-independent: Protection is constant, regardless of tide height.
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Low reaction force: Floating fenders exert less force on vessel hulls—ideal for aluminum or composite hulls.
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Ship-to-ship capability: The same fenders work for STS transfers.
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Easy relocation: Deflate, move, reinflate—no dock modification required.
Wuxi ChuncoTech Rubber is certified to ISO 17357-1:2014 for pneumatic fenders. Our floating fenders feature:
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Stable, reliable construction with multiple reinforcing layers
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Low reaction force and hull pressure
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Available in multiple colors (including gray for naval applications)
Hybrid Solutions: When Solid and Floating Work Together
Some ports use a hybrid approach: solid fenders for the primary berthing face (mid-tide range) and floating fenders for extreme high or low tides. We can engineer integrated systems that combine both types.
How to Decide
Ask these questions:
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What is your maximum tidal range? Less than 3 meters → solid fenders can work. More than 4 meters → floating fenders strongly recommended.
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What vessels will berth? Same vessel type, strong hulls (steel) → solid fenders. Mixed fleet, sensitive hulls → floating fenders.
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What is your maintenance capability? Solid fenders require less attention. Floating fenders need periodic inspection of attachment systems.
Your Unbiased Fender Partner
Because we manufacture both solid and floating fenders, Wuxi ChuncoTech Rubber can recommend the optimal solution for your specific port—without product bias. We provide engineering studies, tidal analysis, and lifecycle cost comparisons.
Visit our website at https://www.chuncotechrubber.com/ to request a fender selection consultation for your high-tidal-range port. Let us help you choose right the first time.