There was a course that was dont by Shane a few years back on doing bridge girder deflection in TBC. Anyone have a workflow on creating girder deflections in TBC? trying to learn or get faster on sending out fills.
what exactly are you tryin to get?
For information model - take the erection camber height and create a parabolic arc betwixt the center of bearing(s) (until the girders land on-site and they are measured its theoretical anyhow). Then, wire frame or solid - see below.
For the Screed adjustment I model out the finish, drape the girder to fin and then add the screed adjustment from the tables given along the tenth points. this creates my fills for false deck. I like to make these parabolic arcs but depending on the owner it can get kicked back as it will change the grade between points by a hundredth or two depending on girder length. I find that the P Arc gives a “trained eye” profile to the rail between points. You can create a Custom Shape for your girder in the Util module (Alan has a good workflow for this - i will try to dig it up) but the shape wont follow the line. So you end up with a girder shape that hits elevation at either end but doesn’t reflect the actual anticipated camper and/or the screed adjustment. You could create null nodes at each 10th point and run the shape node to node which would probably give you a rather segmented look of indevidual pieces. If you just need if for stake out i would get okay with the wire frame created from detailing. Otherwise? Sketch-up and solids all day 
Use your cambered/screed adjusted lines imported to SuP, create teh section shape and follow me. import back to TBC as an IFC or trim bim
There is always corridor - I like to build all sorts of stuff in corridor. This one seems simple: elevate the girder lines with expected camber. Reference said lines in corridor, create instruction for shape (creative use of material layers will get it built), copy paste instructions to remainder of lines. The shape could then be saved as a template as only the reference line would change project to project. I’m going to have to go look at Shane’s method now. I remember the write up but don’t recall his solution