ZRH - FRA normally arriving at A gate (if you are on LX or LH metal), a few occasions a remote stand, if you’re on EN (Air Dolomiti) metal, it’s almost certain you’ll be at the far remote stand. If you arrived at remote stand they will bring you back to arrival A by bus. Make sure you don’t go to baggage claim, but stay insdie air-side. Flights departing to USA from FRA almost always leaves at Z gate (with a few exceptions) and Z gates are just right above A gates. Follow the sign to Z gates it will lead you to passport control. Both A and Z gates are at T1. There is no security recheck as mentioned.