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RE: GUARD RAIL FOUNDATION/ANALYSIS & DESIGN ?

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Syed,

For starters, you might try "Handbook of Steel Drainage & Highway
Construction Products," prepared under the direction of the Highway
Task Force and published by American Iron and Steel Institute.
Chapter 18 of that manual is titled, "Guardrail Design."  There is
some information provided for loads and corresponding maximum
allowable deflections.

Two additional sources might be:

"Highway Guardrail, Determination of Need and Geometric Requirements,"
Highway Research Board, Special report 81, 1964, National Research
Council, Washington, D. C. and

"Guide Specifications for Highway Construction," AASHO, National Press
Building, Washington, D.C.

I do not have these publications, but I hope this information helps.

Regards, Joe S.

__________________________

-----Original Message-----
From: syed faiz ahmad [mailto:syedfaiz23(--nospam--at)hotmail.com]
Sent: Thursday, March 14, 2002 3:06 PM
To: seaint(--nospam--at)seaint.org
Subject: GUARD RAIL FOUNDATION/ANLYSIS & DESIGN ?


Learned Members of the LIst,

As you all may be knowing GUARD RAILS are protective barriers along side
roads to protect the 'Street Furnitures'. Its other purpose is also to keep
the vehicles within it, when hit, and not allow it to overturn or return to
the track which might cause collision with the vehicles on this track.

The GUARD RAIL foundations are usually not Engineered & the supplier's
recommendation vis-a-vis its foundation is adopted. But I need to Engineer
it because Iam contemplating an 'Alternate Foundation Type' for it.

My questions therefore are:

    -  how to go about the analysis & design of
       the guard rail foundations? For those of you
       who donot know it already, the GURAD RAIL
       consists of:

          - a flex beam of corrugated sheet metal
            fixed to the post; the post is usually a
            Channel Section about 700 mm (2ft-4in)
            high & center to center distance between
            posts are usually 1.90m or 6 ft 4-in.

          - the post is either driven into the soil
            or usually embedded in the concrete
            foundation which is usually 1.20 m
            deep; the plan dimension of this
            concrete foundation is usually 450&450
            or 18"* 18".

    -  What forces should be taken into account?

Any body having experience in the analysis & design of GUARD RAIL FOUNDATION
willing to share his/her expertise, please? Thanx in advance for the help.

SYED FAIZ AHMAD; MENGG, MASCE
SENIOR STRUCTURAL ENGINEER
SAUDI OGER LTD
RIYADH, SAUDI ARABIA.


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