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RE: loader surcharge at top of retaining wall

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William,
This may be a stupid question, but I have always had
trouble with the deceleration rate - how does one come
up with something like 0.25 seconds?  Is is "seat of
the pants" or is there a procedure that I am not aware
of?
Thanks,
Ken
--- "Sherman, William" <ShermanWC(--nospam--at)cdm.com> wrote:
> I designed a push wall a few years ago using F=Ma,
> assuming a 10 MPH speed
> and a 0.25-second deceleration rate. The effective
> force came out to be 1.83
> times the loaded weight, so I used 2.0 times the
> loaded weight for design at
> a 4-ft height. I also assumed a lower loading at a
> 12-ft height (with bucket
> raised) based on 0.8 times the loaded weight
> (assuming a 0.8 friction factor
> for tires on concrete and loader pushing against the
> wall with no added
> impact).  
> 
> > -----Original Message-----
> > From: Ken Peoples [mailto:lvtakp(--nospam--at)yahoo.com]
> > Sent: Saturday, November 11, 2000 7:05 AM
> > To: seaint(--nospam--at)seaint.org
> > Subject: loader surcharge at top of retaining wall
> > 
> > 
> > I am designing an 18-foot high retaining wall
> which is
> > to hold back a ramp which will be used by a loader
> to
> > load bins.  The loaders front tires will likely be
> > stopping at the wall - once they hit it that is. I
> > don't have the loader size yet and I know that is
> > important but the question remains the same.  What
> I
> > would like to know is whether there are any good
> > references out there regarding surcharge loading
> for
> > this type of situation.  Our DOT uses something
> like a
> > 3 foot minimum surcharge for bridge abutments but
> I
> > don't really feel comfortable just using that
> without
> > knowing more.  As always, your opinions are
> > appreciated.
> > 
> > Ken
> > 
> > =====
> > Kenneth S. Peoples, P. E.Lehigh Valley Technical 
> > Associates2102 Main St. Suite 200Northampton, PA
> 18067ph: 
> > 610-262-6345fax: 610-262-8188email: lvta(--nospam--at)fast.net 
> > 
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=====
Kenneth S. Peoples, P. E.Lehigh Valley Technical Associates2102 Main St. Suite 200Northampton, PA 18067ph: 610-262-6345fax: 610-262-8188email: lvta(--nospam--at)fast.net 

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