The Hide-Away Front Bunk Bed was originally rated at 400lb.
See min 4:40 here: Axis 24.1 Steve Eberhard - YouTube
This was a 2014 being featured and Thor is now producing the 2015's, so it could have been upgraded.
Driving with the bunk down seems like it would be no problem, but I have no specific info on that. There is something special about the full-up and full-down locks according to Thor RV owners with this option, but I am not sure what were the details.
There is even more about the RUV on the TV show Rollin' On - here:
Rollin' On TV Show #2013-28 TMC / Open House - YouTube
Kim and Steve, Mustang LCDR (Ret), '07 Damon Outlaw #1193
I have seen gross intolerance shown in support of tolerance, Samuel Coleridge
WE LOVE OUR OUTLAW RV