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Re: Culvert Bridge

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Thanks Daryl.


Ed Zabala

--- On Wed, 2/24/10, Daryl Richardson <h.d.richardson(--nospam--at)> wrote:

From: Daryl Richardson <h.d.richardson(--nospam--at)>
Subject: Re: Culvert Bridge
To: seaint(--nospam--at)
Date: Wednesday, February 24, 2010, 2:58 PM

Daniel, Ed,
        I agree with this advice.
        Also, Armco (the corrugated metal culvert people) have one or more handbooks (intended for use with their products) which will have some very useful information for your purposes.
        And there is a DRISCOPIPE handbook put out by Phillips 66.  My copy is decades old but they probably have a newer one.  Among other things this manual contains formulae for determining soil pressure distributions due to point loads.  I think it was related to Boussinesq Equations, which you may also be able to find in a good soil mechanics textbook; but the handbook might be more convenient to use.
H. Daryl Richardson
----- Original Message -----
From: Ed Zabala
Sent: Wednesday, February 24, 2010 12:14 PM
Subject: Re: Culvert Bridge

Hi Daniel,
It's one thing to do the structural design but there's a lot of engineering that goes toward the sizing and configuration of the bottomless culvert structure.  I'm not sure how much engineering help your client got for the sizing but you'll want to make sure this thing will work hydraulically if you are the EOR. 
You may want to consult with a civil engineer (stormwater guy) for a little help.  You can email me if you like if you want to talk about this further.

Ed Zabala

Edward R. Zabala, P.E.
Clayton, NC

--- On Wed, 2/24/10, Daniel Hill <dhh(--nospam--at)> wrote:

From: Daniel Hill <dhh(--nospam--at)>
Subject: Culvert Bridge
To: seaint(--nospam--at)
Date: Wednesday, February 24, 2010, 1:58 PM

Greetings!  I have a residential owner/client that has asked me to design  a 24' long x 18' wide creek crossing bottomless culvert/bridge/driveway.

It is to be cast in place concrete,   and is located in Central Coast of California.

This is outside my normal scope of engineering (I mostly work on residential/commercial buildings) however I did the work on their proposed residence and they have asked for me to consider doing the bridge as well...

can anyone point me to a design manual, and possible warn/point out any unusual design requirements that I would need to be aware of.  I'm hoping I can design similar to site retaining walls.

thanks for your help

rejoice -dhill