AutoCAD Civil 3D - Stormwater

AutoCAD Civil 3D - Stormwater

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*Pro
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Post 1 of 5

SSA - Inlet Rim Elevations and Weir Flow

619 Views, 4 Replies
12-08-2012 01:10 PM

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

Capture.JPG

 

 

jjCapture3.JPG

 

 

jjCapture5.JPG

 

 

jjCapture6.JPG

 

 

Fred Ernst, PE
C3D 2015 SP2
Ernst Engineering
www.ernstengineering.com
Employee
2,909 Posts
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Registered: ‎05-13-2005
Post 2 of 5

Re: SSA - Inlet Rim Elevations and Weir Flow

12-10-2012 05:45 AM 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
Product Manager
*Pro
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Registered: ‎01-07-2011
Post 3 of 5

Re: SSA - Inlet Rim Elevations and Weir Flow

12-10-2012 05:52 AM 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 2015 SP2
Ernst Engineering
www.ernstengineering.com
Active Contributor
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Registered: ‎05-18-2010
Post 4 of 5

Re: SSA - Inlet Rim Elevations and Weir Flow

12-18-2012 12:59 PM 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

*Pro
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Registered: ‎01-07-2011
Post 5 of 5

Re: SSA - Inlet Rim Elevations and Weir Flow

12-18-2012 02:40 PM 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 2015 SP2
Ernst Engineering
www.ernstengineering.com
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