In a simple 3 part tutorial, Junghwo Park explains how to create a single truss in Karamba & Grasshopper and then exporting the geometry into Revit using Dynamo BIM & Rhynamo.
The final tutorial explains how to export the truss that was created in Grasshopper and Karamba and import this into Revit. See Tutorial 1 & 2 – Simple Parametric Truss in Karamba.
Part 3 – Export to Revit
Get the reference files here: KarambaToDynamoBIM_SingleTruss
These tutorials use Rhinoceros (Version 5 SR12 64bit), Grasshopper (0.9.0076), Karamba (1.1.0), Revit (Version 2016) & Rhynamo