I would say that "any" loaded TT tongue weight value has the potential of exceeding or being close to one's hitch rating, thus the importance of a CAT scale weigh-in.
Agreed. For the sake of brevity, however, I prepared my response to answer the OP's "general" weight question as he/she continues to learn about towing basics. CAT scale weigh-ins should be a drill for anyone who tows a TT. Unfortunately, many don't and only focus on mnfr TV/TT ratings/payloads, and/or worse, the TT salesperson. We see this across the numerous RV blogs where somewhere wants to know, for example, if it's "OK" to tow a 8K+ TT with a 1/2 ton TV. I suppose the quick answer is, "it all depends," but what many don't appreciate (ie, those who haven't visited this forum and reviewed the replies from Rustic Eagle and others) is that they will most likely exceed the TV's hitch weight rating before they exceed the TV payload number. It goes without saying that the heavier the TT, the heavier the tongue weight and 13-15% is the correct zone to strive for with those TTs. My point was simply to note that one needs to pay close attention to hitch ratings at these larger tongue weights.
Bottomline to all readers: know your TT and TV mnfr rated numbers. Visit a CAT scale when loaded. Analyze your numbers (with the help of this forum and elsewhere) and make adjustments as necessary. Happy trails and safe towing.
2004 Suburban 2500 LT 8.1L/4.10/4x4
Putnam XDR Class V, Equalizer 1400#
2006 Jayco Eagle 264BHS
Iota DLS-55, Progressive Industries EMS-HW30C, Trimetric TM-2025