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Re: Building implosion

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Thanks a lot for your reply Mr.Harold. My thesis is
based on concrete buildings. I found a link on the net
(http://science.howstuffworks.com/building-implosion.htm).
But it hasnt got much info. Thanks again for your help
and kindly reply...
Best regards,
Alan
--- Harold Sprague <spraguehope(--nospam--at)hotmail.com> wrote:

> 
> 
> It is no bother to reply to questions regarding any
> topic in the structural 
> engineering arena.  Most competent demolition
> companies employ structural 
> engineers to control the process.  Buildings are
> purposefully weakened prior 
> to installing explosives.  Buildings have cables
> installed in them to 
> control the mode of failure.  Plywood boxes are
> installed to protect the 
> explosives.  Wire fabric is placed around the
> perimeter to mitigate blast 
> borne debris.  There are some very skillful
> demolition companies that 
> specialize in controled implosions.  The object is
> to use the minimum amount 
> of explosives as possible while bringing down the
> structure in one shot.
> 
> I have related stories of bad demolition companies
> on the list in the past.  
> The caution that I was referring to was intended
> from some of those 
> previously cited demolition jobs that went bad.
> 
> The specifics I was requesting was more for the type
> of structure.  Is it 
> steel, concrete, shear wall, OCBF, etc?
> 
> Regards,
> Harold Sprague
> 
> 
> 
> 
> >From: cihan "özdemir" <janissary1tr(--nospam--at)yahoo.com>
> >Reply-To: <seaint(--nospam--at)seaint.org>
> >To: seaint(--nospam--at)seaint.org
> >Subject: Re: Building implosion
> >Date: Wed, 30 Mar 2005 21:27:57 -0800 (PST)
> >
> >This is only my thesis subject. What are you
> thinking
> >like that, I dont understand (to other people!).
> Mr.
> >Harold I am a Msc. student in a university and I
> took
> >a thesis subject about controlled demolition works&
> >building implosion. If I was a bad guy, I would not
> >post here, sure. Sorry to bothering you...
> >
> >--- Harold Sprague <spraguehope(--nospam--at)hotmail.com> wrote:
> > > Can you be more specific?  I have done a lot of
> work
> > > in this area dating
> > > back to the early 1980's when I consulted in the
> > > implosion of the Dixon Inn
> > > in Kansas City, and later with the implosion of
> the
> > > General Motors facility
> > > at Fairfax, KS.
> > >
> > > There are a myriad of variables.  Are you
> working
> > > for a demolition company,
> > > or is this more for casual interest?  Some
> wrecking
> > > companies are not
> > > qualified to do this type of work.  You should
> > > exercise caution.
> > >
> > > Regards,
> > > Harold Sprague
> > >
> > >
> > >
> > >
> > > >From: cihan "özdemir" <janissary1tr(--nospam--at)yahoo.com>
> > > >Reply-To: <seaint(--nospam--at)seaint.org>
> > > >To: seaint(--nospam--at)seaint.org
> > > >Subject: Re: Building implosion
> > > >Date: Wed, 30 Mar 2005 02:50:03 -0800 (PST)
> > > >
> > > >Types of explosives use in demolition? These
> > > >explosives? characteristics? The places where
> the
> > > >explosives should put in a building?  The holes
> > > >characteristics which we put the explosives
> inside.
> > > >How can we determine the amount of explosives
> to
> > > >demolish a building? What are the parameters
> which
> > > >effect amount of explosive?
> > > >
> > > >Thanks in advance,
> > > >
> > > >Sincerely,
> > > >Alan
> > > >
> > > >--- ASC <ggg(--nospam--at)bigpond.net.au> wrote:
> > > > > BlankHas anybody got knowledge about
> building
> > > > > implosion
> > > > > works? I have a Msc searching of it and I
> wasnt
> > > able
> > > > > to find enough sources. Any help will be
> > > > > appreciated...
> > > > > Best regards,
> > > > >
> > > > > Alan Parker
> > > > > Civil Engineer
> > > > >
> > > > >
> > > > >
> > > > > Reply: The term is not in general usage.
> > > > > It suggests "exploding inwards" because this
> is
> > > what
> > > > > implosion means in general.
> > > > >
> > > > > Such an event can happen if there is greater
> > > > > pressure outside, then inside.
> > > > >
> > > > > But then, a rectangular building usually has
> > > > > overpressure on two walls
> > > > > and underpressure on two others. The
> implosion
> > > in
> > > > > such a case will be partial only.
> > > > > This is under wind pressure as well as under
> a
> > > blast
> > > > > pressure, although the pattern
> > > > > is more complicated in the latter.
> > > > >
> > > > > Give me more circumstances and I will tell
> you
> > > more.
> > > > >
> > > > > Sincerely, Gregory
> > > > >
> > > > > www.simulate-events.com
> > > > >
> > > >
> > > >
> > > >
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