request for help and advice for the design and implementatio

[S. Heisley]

This might help and give you some ideas: http://tnttt.com/viewtopic.php?t=31995
Scroll down in that build thread to see how it is attached and removable. Below are some pictures from his photo gallery.

[pchast]

Thank you again. I understand now Pchast answer. I was thinking : if the truck tarp comes below the frame, in front and rear, have I really reasons to fear water inside ? Reminber : my tractor is a horse (no highway ), my maximal speed will be around 10 miles per hour ...
I'll try to make and show you a model ...
Sorry again with my language, I try to go without translator ...
Marie

I think we are doing well without the translator...

Fear may be too strong a concern. Any time you leave lumber outside there is a concern for its preservation. Finishing used helps resist the effects of water.

Pmullen503 expressed it well. There are many different sources of water from rain to fog. Temperature changes encourage condensation from morning dew to the humidity of our breathing.