Non-Typical Inlet Grates

Looking for your expertise about how you would define the following non-typical (although quite common) grates in the inlet catalog of OpenRoads Designer.  I have implemented what is probably a good solution but want to hear some more experts. How have you defined these hydraulically in ORD, StormCAD, or elsewhere?

  1. A circular grate. All dimensions are known.
  2. A bee-hive grate.  Dimensions are also known here.