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Old 06-21-2016, 01:00 PM   #15
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The plywood approach may offer some weight savings over composite materials, some of which are very heavy (lb/sf). Also plywood is stronger for point loads (footsteps for instance) than many composite materials, if you compare the same thicknesses.
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Old 06-22-2016, 09:19 AM   #16
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Dear Bart, do you know if it is okay to use 15/16" subfloor? I wanted to use Nylaboard but after using your post it seems better to use plywood ... the nylaboard is recommended by eco people for non toxic allergy issues. but the company is going out of business and all they have left is 15/16" thanks
You'll run into a difference in weight, and the door will be slightly easier to hit, but for a frame-off the thickness of the subfloor will have little impact.

Personally, I find plywood a nice material to work with, but opinions vary .

I'm a strong believer in protecting the plywood surface from water damage; a couple of coats of epoxy & paint on the top surface will really help if your trailer should develop a leak that's not immediately detected. Painting the frame (or using roofing tar on the top, but that's messy) will help prevent
problems should that area get wet. Wet steel rusts, and the rust attacks the wood.

I would also redesign the rear hold down plate to avoid the obviously bad design that leads to rear-end separation. Keeping water away from the plywood/steel interface is important; I used stainless steel to replace the steel angle plate.

- Bart
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Old 06-22-2016, 09:49 AM   #17
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. . .
I'm a strong believer in protecting the plywood surface from water damage; a couple of coats of epoxy & paint on the top surface will really help if your trailer should develop a leak that's not immediately detected.
. . .
Per Post 13 on this thread and Posts 5 and 9 on the following thread, I recommend epoxy-coating both sides of the plywood full sheets, plus all the cut edges of each plywood piece before installation.

http://www.airforums.com/forums/f461...xy-137415.html

Post 7 by RareStream on the thread above confirms the wisdom of coating all the cut edges IMO.
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