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RE: elevators

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They also are using hydraulic elevators that are completely supported on
the top of the slab, with no need for the buried piston

from Otis

Telescopic Holeless Hydraulic 
Otis' Holeless Telescopic Hydraulic elevator employs sophisticated twin
telescoping plungers to extend the rise of our time-tested holeless
hydraulic elevator. The result is a new, precision-engineered,
cost-effective and environmentally safe product with a proven record of
safety and reliability. 

Ideal for installation at sites with known subterranean risks,
waterfront sites and sites with high-water tables.

Brian M. Spencer
TGRWA, LLC
407 S. Dearborn, Suite 900
Chicago, IL 60605
p. 312.341.0055x20
f. 312.341.9966
bspencer(--nospam--at)tgrwa.com


-----Original Message-----
From: Mark D. Anderson PE [mailto:mark(--nospam--at)alaskaengineer.com] 
Sent: Thursday, September 18, 2003 11:20 AM
To: seaint(--nospam--at)seaint.org
Subject: Re: elevators

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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