×
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!
• Students Click Here

*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.

Students Click Here

# Ground cover for sewer pipe2

 Forum Search FAQs Links MVPs

## Ground cover for sewer pipe

(OP)
Hydrauliс Design of Storm Sewers says that ground cover for sewer pipe should count like this: surface elevation minus invert elevation minus pipe diameter.
So, is ground cover a difference of surface elevation and top of the pipe, or difference of surface elevation and invert elevation? If second is right, why do we subtract the diameter of pipe?

### RE: Ground cover for sewer pipe

H is the cover over the pipe

### RE: Ground cover for sewer pipe

(OP)
Thanks a lot, it seems that there is a mistake in the book.

### RE: Ground cover for sewer pipe

Actually, I think the book is correct, ignoring the pipe wall thickness. If the invert elevation is say, 100' and the surface elevation is 110' and the pipe diameter is 2', then 110' - 100' - 2' = 8' = the distance from the top of the pipe to the surface = cover.

### RE: Ground cover for sewer pipe

(OP)
Thanks, now I got it.
Here in Russia, we take ground cover not for top of the pipe, but for invert level, and it confused me a little.

### RE: Ground cover for sewer pipe

You can download a manual explaining everything at American concrete pipe association (ACPA)

### RE: Ground cover for sewer pipe

lKobRal:
Be careful with your Russian definition of ‘ground cover.’ By your definition, you could have a 48” dia. pipe which had 6” or a foot of ‘ground cover,’ but otherwise was barely properly bedded. The major portion of the pipe would still be 3.5’ or 3’ above the grade. In the U.S. we are usually thinking in terms of soil covering to protect against freezing and/or protection with respect to loads superimposed over the pipe, such as truck axle loadings, etc.

#### 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! Already a Member? Login

#### Resources

White Paper - The Criticality of the E/E Architecture
Modern vehicles are highly sophisticated systems incorporating electrical, electronic, software and mechanical components. Mechanical systems are giving way to advanced software and electronic devices, driving automakers to innovate and differentiate their vehicles via the electric and electronic (E/E) architecture. As the pace of change accelerates, automotive companies need to evolve their development processes to deliver and maximize the value of these architectures. Download Now
White Paper - Model Based Engineering for Wire Harness Manufacturing
Modern cars, trucks, and other vehicles feature an ever-increasing number of sophisticated electrical and electronic features, placing a larger burden on the wiring harness that enables these new features. As complexity rises, current harness manufacturing methods are struggling to keep pace due to manual data exchanges and the inability to capture tribal knowledge. A model-based wire harness manufacturing engineering flow automates data exchange and captures tribal knowledge through design rules to help harness manufacturers improve harness quality and boost efficiency. Download Now
White Paper - Modeling and Optimizing Wire Harness Costs for Variation Complexity
This paper will focus on the quantification of the complexity related costs in harness variations in order to model them, allowing automated algorithms to optimize for these costs. A number of real world examples will be provided as well. Since no two businesses are alike, it is the aim of this paper to provide the foundational knowledge and methodology so the reader can assess their own business to model how variation complexity costs affect their business. Download Now

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:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!

Already a member? Close this window and log in.