INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

counter map and sewer invert elevation

counter map and sewer invert elevation

(OP)
How to read counter map?

See attached image

Are A and B invert elevations or rim elevations? Can both be determined by this number?
How can we find the elevation of the house? C
Is E and F the elevation of street or house? Generally there are 4-5 steps up to first floor of house in front yard on this street.
For D it is a 10” sewer main. What is meaning of 23-83?
For G is R=4.77 the slope of ground?

http://files.engineering.com/getfile.aspx?folder=e...

RE: counter map and sewer invert elevation

Regarding: Are A and B invert elevations or rim elevations? Can both be determined by this number?

Would appear that A & B are sewer inverts. Rim elevations normally are put on the drawing, but not in this case. Rim elevations are unkwown.

Regarding: How can we find the elevation of the house? C

Do a survey.

Regarding: Is E and F the elevation of street or house? Generally there are 4-5 steps up to first floor of house in front yard on this street.

I would think that E & F are the elevations of the lot corners.

Regarding: For D it is a 10” sewer main. What is meaning of 23-83?

Unknown, but may be evident if more of the plan is shown. May be manhole numbers.

Regarding: For G is R=4.77 the slope of ground?

I would think that is correct.

RE: counter map and sewer invert elevation

Where did you get the map from? Best bet is going to be to ask your source.

My guess would be that the 2-line numbers formatted 15" over 20-70' for example is the sewer size and line identification.
5 digit numbers near circles/manholes appear to be inverts inlets and outlets.

Again, I'm just guessing here, go back to the source of your map and ask there.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close