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RE: amusement structures

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I suggest you contact Kevin Vincent Kelly, SE in Santa Monica California. He
is most noted for his creative roller coaster designs that Discovery Channel
and CE News covered some years ago. He is in the book.

Dennis Wish

> -----Original Message-----
> From: Aaron Burkhardt [mailto:aaron(--nospam--at)]
> Sent: Tuesday, January 04, 2000 9:08 AM
> To: 'seaint(--nospam--at)'
> Subject: amusement structures
> Is anyone familiar or had experience with "amusement structures"? I am
> reviewing some calculations for a waterslide structure and they have
> omitted all seismic calculations (we are in seismic zone 3) with
> a blanket
> statement "wind load governs" (we are only 80 mph,  exp. B). The load
> comparison done shows the seismic and wind loads to be somewhat close in
> value. In section 1634.1.2 it states that the redundancy factor may be
> taken as 1.0 for non-building structures. If there was a
> structural system
> that is not redundant, wouldn't a cantilevered column system such as this
> be it? Looking through he table 16P all the non-building structures are
> generally not going to have hundreds of children running over them at any
> given point in time, so that is the reason I am concerned. Also, in a
> cantilevered column system, shouldn't the base plate weld to the
> column and
> the plate itself be subject to omega level forces and the detailing
> requirements of chapter 16 and 22?
> Thanks,
> Aaron Burkhardt, P.E.
> KPFF Consulting Engineers
> Portland, OR