I'm running feeder wires in 1-1/4" schedule 40 PVC underground to detached structure. I plan on using a 2" sleeve for the slab pour and a long 3' radius sweep elbow conduit fitting to bring wires up from the trench into the building. I was thinking of using schedule 80 for the sweep, but everyone here still uses schedule 40 for above ground transition and no one is really stocking schedule 80. Feeders will run in conduit on the surface of the wall to a surface-mounted panel. I was planning to use 1-1/4" EMT for the inside run. What transition couplings are available for this? And should I make this transition just after the schedule 40 PVC emerges from the sleeve? Other suggests for a better way to do this?
The most obvious options are a "conduit body" or a junction box. That also provides pulling access, which is likely useful at that point. That's what I'd do.
If you really don't need a pulling access point there (less than 360 degrees bend end to end from where you do have access) you can use a PVC to male threaded transition, a threaded coupling female to female, and an EMT to male threaded fitting. I have my doubts about it, but technically it works.