We have a real problem. When bringing in a .fbk file with prism constant and prism height defined, the prism height is being read as 0. Commenting out the Prism Constant allows the rod heights to be read properly, but the distances are now off. This seems to be in all of the SS3 and SS4 versions. I even DL the MR1 of SS4 and I am having the same issues.
I believe this post might help.
https://communities.bentley.com/products/road___site_design/f/geopak-inroads-mx-openroads-forum/110966/fbk-import-to-open-roads-survey-version-ss4/338428#338428