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Re: Snow Drift Load

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I think the firm is RWDP or something like that (starts
with an R) near the University of Guelph.  There is also
another firm there doing the same stuff. Also there is
the well-known wind lab at Unoversity of Western Ontario
in London (2 hours west of toronto).
Gary

On 30 Jul 2004 at 14:11, Daryl Richardson wrote:

> Mike,
> 
>         Thanks for the complement.
> 
>         My use of the term "major dissertation" was a feeble attempt
>         at
> humour due to my tendency to over verbalize.
> 
>         I was actually present for part of the model study but it was
>         in
> 1975 or 1976. Even so I've probably forgotten most of the technically
> important details.  Essentially, the testing went something like the
> following.
> 
> 1.    The scale was quite small, something in the order of 1" = 50',
> give or take.
> 
> 2.    The tests were conducted in a water flume which was about three
> feet wide and, perhaps 12' long. The water was about 8" deep and the
> flow rate was about one or two feet per second.
> 
> 3.    Sand was used in place of snow.  I don't remember the size; but
> it was fairly find.  I expect it would all pass a #100 screen.
> 
> 4.    The model had to be reassembled for each different height of
> building above ground level.  Each model was tested for wind direction
> from at least 8 compass points.
> 
> 5.    I don't remember how long the tests took; but it was a few
> hours, not a few minutes (Perhaps 4  hours).
> 
>         Of course, as we all know, the scale, flow rate, viscosity,
>         sand
> density etc. etc. all have to have properly matched ratios
> model/prototype.  In all, I found the whole thing very interesting
> (Mr. Spock might even say "fascinating!").
> 
>         The testing was done in a private testing lab owned by a
> consulting firm.  As I recall, there were four "partners or
> principals" and several or all were engineering professors at "Guelph
> University" (if I've got that name right), which is located a few
> miles (50 or so) west of Toronto, Ontario, Canada.
> 
>         As far as cost is concerned I didn't have anything to do with
> the cost; I have no idea what it actually did cost.  That said, we can
> all make a reasonable guess.  Say 300 to 400 hours for engineer and/or
> technicians plus a month rent of the equipment plus a report.  Even
> considering that university types under value their own services it
> would not likely cost less than $50,000.00 if done today.
> 
> Regards, Mike,
> 
> H. Daryl Richardson
> 
> "Michael L. Hemstad" wrote:
> 
> > "......I hope this major dissertation is of some help to you.
> >
> > Regards,
> >
> > H. Daryl Richardson"
> >
> > Well, Daryl, I thought it was pretty cool.  Thanks.
> >
> > How does one go about conducting a model study like that?  Are there
> > Universities who do it, and roughly what does it cost?
> >
> > Mike Hemstad, P.E.
> > TKDA
> > St. Paul, Minnesota
> >
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