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Re: elevators

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Bear in mind that nobody said that a hydraulic elevator is dependent upon
having a casing that is load bearing at the bottom end.  There is no reason
that the casing enclosing the ram cannot be "hung" from a structural slab.

Mark D. Anderson
Anchorage


----- Original Message ----- 
From: "Jason Kilgore" <jkilgore(--nospam--at)leok.com>
To: <seaint(--nospam--at)seaint.org>
Sent: Thursday, September 18, 2003 7:22 AM
Subject: Re: elevators


> The project is actually on a steep hillside straddling a creek bed beside
a
> river with decades of loose dumped fill (5 to 20 ft.).  And now they're
> going to put an additional 10-30 ft. of compacted fill to level the site.
> The Geotech report anticipates up to 15" of long-term settling, so the
> structure is completely supported on drilled piers to bedrock with a
> structural ground floor slab.  Since the earth is essentially
non-existent,
> a holed hydraulic will not work.
>
> I too would assume that a holeless roped hydraulic would be the economical
> choice, but the architectural drawings appear to indicate a traction unit
> sitting in the penthouse.  One reason might be speed - traction elevators
> are much faster than hydraulic.
>
> BUT, after visiting the Otis and Schindler sites (thanks for the
> information), I have determined that I need much more information that I
> have.  So, I'm going to demand more information from the architect
> (politely, of course) before I proceed with designing this area.
>
> ----
> Jason Kilgore
> Leigh & O'Kane, L.L.C.
> jkilgore(--nospam--at)leok.com
> 816-444-3144
> 816-444-9655 (FAX)
> ----- Original Message ----- 
> From: "Roger Turk" <73527.1356(--nospam--at)compuserve.com>
> To: <seaint(--nospam--at)seaint.org>
> Sent: Thursday, September 18, 2003 9:47 AM
> Subject: elevators
>
>
> > Jason,
> >
> > I don't deal with elevators often, but unless you are dealing with
bedrock
> > subsurface conditions, it seems that a traction elevator is rather
> expensive
> > for a 5-story building.  IIRC, hydraulic elevators are the more
economical
> > units for this height range.  Telescoping tubes permit rather shallow
> > embedment depths.
> >
> > A. Roger Turk, P.E.(Structural)
> > Tucson, Arizona
>
>
>
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