GrahamHR
Well-known member
I'm surprised that trailers made from extruded aluminium alloy "I" beams are not common in Europe ( that includes the UK ). They are common in the USA, albeit more expensive than steel ones. "I" beams are stiffer compared to box sections of the same material/ weight ( obviously orientation dependent) . Aluminium is significantly less dense than steel, so such trailers are much lighter, allowing a heavier boat to be legally loaded and towed. Plus of course with an "I" beam construction, there are no cavities for salt water to be trapped and for corrosion to start.
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