Joining in the round using Straight Needles!

How to join in the end with straight needles ! Patter has me casting on 52 and using right needle to join???

Hmm, you’d have to use double points or 2 circulars or a single maybe 16" circular. Unless it’s double knitting?
You can quote a few lines of the pattern if you wish. That might help us.
What are you making and what is the pattern name?