The '16 32SA came on two chassis, so you have to know which one you've got. The 22,000 lb version was standard, the 24K version was optional.
So, first look at the back wall of the bedroom closet. That's where the weights and capacities placards should be.
If they aren't there you'll have to call Tiffin (have your VIN handy) and ask them to send you the "as-built" sheet and copies of the appropriate placards.
I've attached photos of mine. We're on the 24K chassis. The hitch is rated at 5000 lbs. I'm not sure what the hitch rating is for the 22K chassis.
2016 Tiffin Allegro Open Road 32SA
2017 Jeep Wrangler JKU
2014 Thor Axis 24.1 & 2012 Spyder on Aluma UT10