Deck reports - longitudinal lines

I'm using OpenBridge SS3.  Is it possible to insert additional longitudinal lines for deck elevation reporting?  For instance, I need to export the elevations along PGL (4' offset L & R), but there is no physical element such as a slope break point or barrier, etc., so I cannot select that line from my "Common References" list when running the deck elevation report.  I added the points to the deck template, so the model recognizes a joint at 4', but still doesn't show in the Common References list.  Any other way to add arbitrary lines to the report?