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Re: Vertical component of EQ in UBC97 and IBC2000

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Harold
I, too, would like to know more abt the bridge crane
failures.
TIA Gary


On 9 Nov 2004 at 10:47, Christopher Wright wrote:

> 
> On Nov 9, 2004, at 10:23 AM, Harold Sprague wrote:
> 
> > There were some tanks that had hoop stress failures.  There were
> > bridge cranes that collapsed.
> What a great thread--makes all the political rants worthwhile. I'm
> real curious about the tank hoop stress failure and the bridge crane
> failures. Were any reports published?
> 
> Were the tank failures really overstress in the girthwise direction
> like you'd get with over-pressure or simply side wall failures? Was
> the failure mechanism determined? What did the failures look like? Any
> pictures? Were the tanks liquid-filled? Were the tanks intended to be
> pressurized or simply gravity tanks Were the tanks horizontally
> mounted or vertical? What sort of supports were used? Did the supports
> also fail?
> 
> What failed on the bridge cranes? Girders, end trucks, connections?
> Did the structure itself fail or did either the bridge or trolley jump
> the rails? Were there seismic hold-downs on the bridge or trolley?
> Were the cranes under load at the time?
> 
> Christopher Wright P.E. |"They couldn't hit an elephant at
> chrisw(--nospam--at)skypoint.com    | this distance" (last words of Gen.
> ...................................| John Sedgwick, Spotsylvania 1864)
> http://www.skypoint.com/~chrisw/
> 
> 
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