manhole detail and drawing???

[anbm]

We (electrical designers) are working on a design with civil folks, and they are asking us to provide a manhole detail drawing…
I never heard or knew electrical has to design or draw manhole, need some advises here.

 

[don_resqcapt19]

The electrical side must supply the required sizes and raceway layouts, then the civil side can design the actual structure.

 

[petersonra]

We (electrical designers) are working on a design with civil folks, and they are asking us to provide a manhole detail drawing…
I never heard or knew electrical has to design or draw manhole, need some advises here.

I had this happen once on a project in an earthquake zone. We just had the PE that was doing the electrical construction drawings add it to their drawings. It was not a big deal for them 30 some years ago, so I imagine it could be done today as well.

 

[JoeStillman]

I've never worked with a civil engineer that knew how to size one. We design them ourselves when we need them. There's lots of details you can steel acquire on the interwebs. I know some of the precast concrete manufacturers have handy product info on their web pages.

 

[petersonra]

I've never worked with a civil engineer that knew how to size one. We design them ourselves when we need them. There's lots of details you can steel acquire on the interwebs. I know some of the precast concrete manufacturers have handy product info on their web pages.

The PE firm had EEs that worked on the system. They had drawings of all the trapezes that held up the conduits, the wall penetrations, on UG services, so it was not real hard for them to add the UG electrical stuff. The city where it was going had some pretty strict earthquake rules and there had to be drawings of the structural details of just about everything.

We just farmed it out to a PE firm, as we had no one who knew anything about it.

 

[anbm]

I've never worked with a civil engineer that knew how to size one. We design them ourselves when we need them. There's lots of details you can steel acquire on the interwebs. I know some of the precast concrete manufacturers have handy product info on their web pages.

Do you have/know website address?

 

[anbm]

The electrical side must supply the required sizes and raceway layouts, then the civil side can design the actual structure.

raceway layout? like duct bank? is there certain spacing requirement when conduit run in parallel?

 

[Julius Right]

See National Electric Safety Code [NESC C2/2017?]

32. Section 32: Underground Conduit Systems/​

• Rule 323  MANHOLES, HANDHOLES, AND VAULTS

 

[Julius Right]

The Electrical Physical Design will design the duct bank and manhole general arrangement [layout], since we know what cables are and from where to where they will run.
We have a list of manhole type ,also.
See the typical attached sketches.

 

[Julius Right]

See attached standard ductbank and menhole [typical]

 

[petersonra]

See attached standard ductbank and menhole [typical]

Is it menhole or manholes?

 

[anbm]

The Electrical Physical Design will design the duct bank and manhole general arrangement [layout], since we know what cables are and from where to where they will run.
We have a list of manhole type ,also.
See the typical attached sketches.

can the manhole be square shape or has to be hexagon?

 

[Julius Right]

Manhole architecture depends on how many duct banks are entering [or conduits leaving the manhole] direction of the duct bank and other.
See here attached an example :

Manholes, Handholes & Transformer Pads

www.advanceconcreteproducts.com