I'm trying to create a standard drop inlet with open sides for use in GeoPAK drainage. The one I'm using is similar to this:
ftp://ftp.dot.state.tx.us/pub/txdot-info/cmd/cserve/standard/bridge/ilhste02.pdf
My issue is that the DLB only allows me to create a Curb, Grate, Curb AND Grate or Slotted Drain.
My initial thought is to "trick" it and input the drop inlet as a curb inlet. I would make it for "Sag Only" with length = total open length, curb opening height would be set accordingly and depression characteristics would be for the apron.
Any thoughts? Surely I'm not the first person to create a drop inlet with no greate in a DLB file.
Any assistance is greatly appreciated.
~Ryan, Fort Worth, Texas
Hi Ryan,
looking at the referenced PDF, it appears as though that inlet is a "field inlet"; not designed to be incorporated into a kerb line but to be placed is a sag/sump situation in an open area. Is that correct?
If yes, then the "trick" you have devised is one possible solution. Of course, the algorythm that is implemented for kerb inlet openings would not match the situation you have in that field inlet... but, in all honesty, we dont appear to have anything that specifically matches your inlet design.
Another option may be to create a "Grate" for "Sag" conditions. This may be a little closer to the flow conditions with an allocation for perimeter inflow (as you would have with your field inlet) but without the option to set the "depression" scenario that you have.
Its a tough call - with neither option appearing to fit perfectly.
I'd suggest that the Grate scenario would be a closer fit... but that is a bit of a guess :-)
Good Day Ryan: You can do this by defining your node a Curb&Grate in sag. C&G in sag does its calculations as an orifice which will result in proper calcs for your node. Double check this based on your own knowledge of the project, to be sure.
Robert GarrettSenior Product EngineerBentley Systems Inc.
this appears to do the trick.
thanks
~ryan