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Trailer Bunks Wood or Composite?

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Old 03-30-2018, 10:08 AM
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Question Trailer Bunks Wood or Composite?

I need to replace the bunks on my trailer. Is there anything better than treated wood? Can the composite deck material be used?
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Old 03-30-2018, 10:16 AM
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Regular pine.

That's what the bigger/better trailer manufactures use and recommend (Myco).
DON'T use the salt-treated lumber. The chemicals in it do not do well with the points they are bolted to the trailer; especially when they get wet and drip down the stanchions.

IF you REALLY want to invest a bit deeper, go with Cypress wood, which is 'swamp-wood' and has the same waterborne life characteristics of salt treated pine. But it will be pretty expensive.
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Old 03-30-2018, 04:21 PM
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Originally Posted by Sydwayz
Regular pine.

That's what the bigger/better trailer manufactures use and recommend (Myco).
DON'T use the salt-treated lumber. The chemicals in it do not do well with the points they are bolted to the trailer; especially when they get wet and drip down the stanchions.

IF you REALLY want to invest a bit deeper, go with Cypress wood, which is 'swamp-wood' and has the same waterborne life characteristics of salt treated pine. But it will be pretty expensive.
The bunks on my trailer were pressure treated fir and the galvanized lag bolts fastening the bunks to the trailer brackets corroded severely in fresh water.
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Old 03-30-2018, 07:52 PM
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Composite decking is floppy junk for your purposes.
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Old 03-30-2018, 09:06 PM
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Always used polyurethaned pine with silicon on the lags. Hardest part was finding the straightest boards st Home Depot.
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Old 03-30-2018, 09:27 PM
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Originally Posted by Sydwayz

IF you REALLY want to invest a bit deeper, go with Cypress wood, which is 'swamp-wood' and has the same waterborne life characteristics of salt treated pine. But it will be pretty expensive.
My last 2 trailers have had cypress and it lasts forever (ok, 14 years, so far). It’s not the cost of the cypress, it’s the price to ship it that bites you. Have one of those Florida boys bring some to you this summer. Unless those F650s can’t tow a boat AND carry a couple pieces of lumber at the same time.


https://www.boattrailerpartsplace.co...ress-bunks-3x/


Last edited by Speedracer29; 03-30-2018 at 09:37 PM.
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Old 03-31-2018, 06:51 PM
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Why use galvanized bolts? Seems like stainless would last longer.
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Old 03-31-2018, 07:07 PM
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Originally Posted by WARPARTY36
Why use galvanized bolts? Seems like stainless would last longer.
Guessing the brackets were galvanized and dissimilar metals (stainless) speed up the effects of electrolysis?
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Old 04-02-2018, 06:07 AM
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Originally Posted by Speedracer29


My last 2 trailers have had cypress and it lasts forever (ok, 14 years, so far). It’s not the cost of the cypress, it’s the price to ship it that bites you. Have one of those Florida boys bring some to you this summer. Unless those F650s can’t tow a boat AND carry a couple pieces of lumber at the same time.


https://www.boattrailerpartsplace.co...ress-bunks-3x/


Just grab a few chunks when you are in the Swamp next month
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Old 04-02-2018, 12:43 PM
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My last Myco had the bunks through-bolted (with nuts) - it was kind of a pain the ass when you needed to replace one, but it seemed like they lasted longer. My current trailer has lag screws to hold the bunks on. ...and it seems like I'm always replacing screws due to them falling out.

Something to consider.
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