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SSA - Inlet Rim Elevations and Weir Flow

4 REPLIES 4
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Message 1 of 5
fcernst
3276 Views, 4 Replies

SSA - Inlet Rim Elevations and Weir Flow

This inlet scematic is tough for Inlet Rim Elevation.

 

Do I have all of the following Rim Elevation situations correct?

 

Also, does SSA include all four sides of a grate inlet that is not in a curb setting for its perimeter length in its weir flow calculation?

 

Thanks

Fred

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Fred Ernst, PE
C3D 2024
Ernst Engineering
www.ernstengineering.com
4 REPLIES 4
Message 2 of 5
Matt.Anderson
in reply to: fcernst

Fred -

 

The Inlet Rim Elevation would the elevation at the gutter flow line.  The Combination Image shows a depression, so you've labeled the top of curb opening. 

 

Matthew Anderson, PE CFM
Product Manager
Autodesk (Innovyze)
Message 3 of 5
fcernst
in reply to: Matt.Anderson

Thank you for the clarification. Makes more sense.

 

It just looked like in that schematic that it might have been pointing to that dashed hidden orthoraphic line that goes to the top of the opening.



Fred Ernst, PE
C3D 2024
Ernst Engineering
www.ernstengineering.com
Message 4 of 5
jmiller0621
in reply to: fcernst

Fred

In response to your second question... I have asked this before.  Not much help, but you can look at the following thread for some more info:

 

http://forums.autodesk.com/t5/AutoCAD-Civil-3D-Stormwater/SSA-Drop-Inlets/td-p/2754376

Message 5 of 5
fcernst
in reply to: jmiller0621

Thanks jm. I understand your frustration..

 

Yes, responses like  "I think" and "probably.."  are not helpful from the Autodesk Technical Consultant.



Fred Ernst, PE
C3D 2024
Ernst Engineering
www.ernstengineering.com

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