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manhole size and constructubility

7 REPLIES 7
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Message 1 of 8
Hidden_Brain
1652 Views, 7 Replies

manhole size and constructubility

I have a drainage system laid out which has quite a few manholes with multiple pipes coming in at various angles. I am looking to get some suggestions/recommendations on how to use the available tools to make determination how big a manhole needs to be based on the pipes coming in.

 

Typically, we try to have at least 6 inches of concrete in the inside wall of the manhole between pipe OD+2" coring. I have approximately 50 manholes like this. Is there any easy way to figure out based on incoming pipe angles, pipe dia and material (thickness) that I can make a determination on the manhole size?

 

I am interested to know how everyone is doing this? I appreciate any help on this.

7 REPLIES 7
Message 2 of 8
Jay_B
in reply to: Hidden_Brain

This free MH size calculator might help.

http://www.cretexconcreteproducts.com/node/204

C3D 2018.1
C3D 2016 SP4

Win 7 Professional 64 Bit
Message 3 of 8
Joe-Bouza
in reply to: Hidden_Brain

Same line as Jay, Google and talk to your local precaster

Joe Bouza
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Message 4 of 8
Joe-Bouza
in reply to: Hidden_Brain

You definitely want to leave some meat on the bone

Joe Bouza
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Message 5 of 8
Hidden_Brain
in reply to: Jay_B

Thanks for the link, I have something similar from a precaster. I am trying to automate/semi-automate getting the angles between the connected pipes out for the entire drainage network so that I can feed those in to a tool like this. Any suggestions?
Message 6 of 8

Hidden_Brain -

 

I think this should cover what you are looking for.  https://apps.autodesk.com/en/Detail/Index?id=3913582902813411430&appLang=en&os=Win32_64 

 

Its a well designed tool that I used very early on for a number of projects.  

Matthew Anderson, PE CFM
Product Manager
Autodesk (Innovyze)
Message 7 of 8
rpatrickVEJ49
in reply to: Jay_B

I know this is an old thread, but I had to check.

I used to have that cretex MH size calculator on my desktop, until our company servers got hacked and I lost it. The link you posted now goes nowhere, I think Cretex may have sold this division of their company? Anyways, do you know of anywhere else I could get this MH Calculator, or something similar? I've been searching online today with no luck.
Message 8 of 8

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Matt Anderson
Product Manager

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