Model a curved beam (Displacement)

I am modeling a curved roof and used structure wizard to break the curve into smaller segments of a straight line. I can run the model and get the proper reaction and beam results that I previously estimated. The displacement is much greater than I expected and I believe it is because the beam is broken into smaller segments. (I ran a model with a single beam going to the supports vs the same beam broken into segments. The results were a displacement of 0.4 " vs. 4") 

Do I need to assign anything specific to the member for a more accurate displacement?