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Re: elevators

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Mark,

        I agree with your assessment, Mark.  The last two elevators I have
installed have had the hydraulic rams set either on the bottom of the elevator
pit or set on piers ABOVE the bottom of the elevator pit.

Regards,

H. Daryl Richardson

"Mark D. Anderson PE" wrote:

> 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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