Your the one that can't read. Now that your the expert were watching for results. The rest of us will use our rusty metal trailers.
I read EXACTLY what you wrote.
What does 10 to 16 foot have to do with it? Why would it matter? They make 40ft 18 wheel dump trailers out of aluminum. They make 1 horse trailers, 2 horse trailers, 30ft multi horse trailers - etc, all out of aluminum. I have a 10ft long utility trailer - made out of aluminum. My father has an 8ft long utility trailer he built himself 40 YEARS AGO - what we have overloaded the crap out of on multiple occasions - made out of aluminum. The biggest trailer manufacturers in the business make car hauler trailers up to 24 ft in bumper pull - and longer than that in bed-pull - in aluminum. There's a number of dump-bed manufacturers for truck bodies - making them in 10ft long for smaller 1ton size trucks - and longer than that for larger trucks - in aluminum.
Is there some mystical physics going on that prevent aluminum being used on 10 to 16ft long bumper pull dump trailers? I doubt it.
Up until about 10 years or so ago - a lot of these aluminum trailers didn't exist. Companies saw opportunities in the market - and started making them. They must be doing something better than just falling apart and exploding when their users haul them around with big loads in them - because otherwise those companies would be out of business.
Like I said - I read EXACTLY what you wrote. You're trying to make some implication that aluminum makes no sense for a 10 to 16 ft dump trailer. This has no relevance here based on the evidence.
Maybe the companies making dump trailers think it's too expensive. I have no idea. Like I suggested before - why don't YOU try calling them and finding out since this seems to concern you so much.
All I asked is a simple question - "does anybody know where to get aluminum extrusions " - because I would "like to" - build the DUMP BED - out of aluminum. For rust reasons.
Like I said two times before in this response - I read what you wrote. And I read between the lines too. That's why I said all you're trying to do is start a pissing match.
Maybe you need to go back and read what I wrote. I pust pointed it out to you above.