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Aluminum bunk brackets in a 10,000 pound trailer?

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Aluminum bunk brackets in a 10,000 pound trailer?

Old 10-29-2019, 05:58 AM
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Default Aluminum bunk brackets in a 10,000 pound trailer?

It is time to change the aluminum cross pieces and bunk brackets on my Loadmaster trailer. The trailer is 21 years old and everything has been replaced at least 1 except the I-beams and the bunks. The boat came with galvanized bunk brackets and I changed them and the cross pieces 10 years ago.



Doing a little searching, 8 inch bunk brackets are available in galvanized, aluminum and stainless steel. Stainless steel is too expensive, but there’s not that much price difference between galvanized and aluminum brackets. Aluminum brackets on an aluminum cross piece will not be a corrosion issue and the stainless steel U bolts can be isolated from the aluminum cross piece with a piece of aluminum U channel.



The bigger problem is the difference in strength between steel and aluminum, with steel being approximately twice as strong. All of the brackets I’ve seen are ¼ inch thick. 3/8 inch thick aluminum bunk brackets are available in the 10 inches size, but I am afraid that the ¼-inch thickness will be too weak for my application.



Has anybody been using ¼ inch inch thick aluminum bunk brackets on trailers with a 10,000 pound rating?

Old 10-29-2019, 06:29 PM
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What is on there now? Why not Galvanized ? Just isolate it from the aluminum.

Isolation Between Dissimilar Metals
Old 10-31-2019, 09:29 PM
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I use aluminum on 21k lb trailers.
Old 10-31-2019, 09:44 PM
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I have bunk brackets on my #15,000 tri axle with a narrow aluminum bunk sandwiched between them maybe 1/2”. Spaced several inches apart and through bolted to a wood bunk=very strong.
Old 11-01-2019, 10:03 AM
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Originally Posted by cajflynn View Post
I use aluminum on 21k lb trailers.
How thick is the aluminum?
Old 11-01-2019, 11:18 AM
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Click on the descriptions for any of the L-brackets on the page;


https://www.sturdybuiltonline.com/L-...ket_c_102.html

They list all the dimensions you may be looking for.

This past spring, I got two sets of the HD S/S 8" brackets for my 5,500lb boat/7,000 lb capacity trailer.

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