Calabrio
Retro 155.

I found a soft spot behind the front door.  The damage is currently limited, but as I don't understand how these are built, I'm unsure how to repair this.

Is the OSB floor secured to the steel frame of the trailer?
What is it secured with?  Self tapping sheet metal screws?

Can I simply cut out the bad area, replace with a 5/8 piece of OSB, and drill it into the metal frame?
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Badger McAdams
Look at the thread that Tom started about replacing the floor in his trailer. IF you are going to repair, go with a piece of ply that you have sealed/treated to keep out water. His thread answers so far, all your questions. Good luck!
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Calabrio
http://www.riversidervowners.com/post/replace-floor-retro-155-9777812

Yes, I've since found it, another one his helpful threads
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