[BC] Shakin

[Mike McCarthy]

My biggest worry would not be the buildings as many codes in that 
area have been updated to require factoring seismic activity in the 
design of the building.  Especially commercial buildings. The New 
Madrid Fault is more lateral moving than sublimating as the 1812 
quake would indicate by the redirection of the Mississippi River and 
creation of Horseshoe Lake, which is one of the few places Missouri 
has land EAST of the river.

It would be the towers which I'd be more worried.  Unless the tower 
was designed to Rev. F. or G AND incorporated seismic design factors, 
a TALL guyed tower (relative to height/width) will likely develop 
serious and potentially catastrophic standing waves along it's length 
and/or guy lines.  Especially if the quake was a rolling vertical event.

Self supporters are by no means immune either.  Tall slender 
self-supporters would likely loose the top most section due to 
whipping if the quake was a lateral movement or rolling type 
event  But the lower sections would likely remain standing as due to 
their rigidity and lower center of gravity.  That said, designing and 
building a STL tower in that area should be done with care 
considering the proximity to people in the studio.  Rev G alone will 
not be enough...

MM

At 08:48 AM 4/20/2008 -0700, Dale Adkins- WINI AM wrote
>We have sympathy for you guys on the Pac coast who get these shakes all the
>time...
>....but we are always a little nervous about  quakes because we are sitting
>on the
>New Madrid Fault which produced a 7-plus  in the 1800's  and we are
>continually
>told to expect another one.   With all the bridges and streams in the
>Mississippi and Ohio valleys
>a quake like that would put us in deep doo doo..  Meanwhile we'll just keep
>dodging
>the tornados when possible.
>DA