Elliptical manhole.

[Jay_]

Dear,
I hope everyone is well, i am working on the design of elliptical flange for a manhole.
Does the rules of Asme div 1, appendix 2 apply? Or should we use another code? Does EN 13445-3 rules apply?

Detailing is a hobby,

 

[dik]

Why would you want an eliptical manhole cover, or is the cover round?

-----*****-----

So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[Jay_]

Dear it is a client requirement.
He needs the manhole to be an ellipse of some kind, 400x500mm. So the flange and manhole cover needs to be elliptical. Does appendix 2 apply?

Detailing is a hobby,

 

[dik]

I'm not sure about the Eurocodes, but in Canada, the requirements would apply. An eliptical manhole and supporting strucure is far more costly to manufacture and has the disadvantage that it can fall into the manhole 'shaft'.

-----*****-----

So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[SnTMan]

Jay_, elliptical manways are commerically available. You could just buy one.

Faiing that, from your Apx 2 reference I guess you want a flange of some sort and flat cover. UG-34 has explicit rules for non-circular covers.

For the flange, ans assuming current U-2(g) rules permit, you could adapt Apx 2 rules a couple of ways. 1) Treat the thing as circular based on the major axis length.

2) Treat the thing as circular using an equivalent ID based on the area of the opening.

In any case I'd think you would need to insure the opening is adequaely reinforced, UG-37.

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[dik]

Thanks Sn... I didn'tknow they made them.

-----*****-----
So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[SnTMan]

yeah, you see 'em in commercial air receivers for one...

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[Krausen]

I would challenge your client's request/requirement for ellip manhole. They are an old-school design originating from the early naval submarine era & no longer allowed by most

 

[david339933]

Elliptical manways are used all the time...easily purchased from a head supplier.