They seem to change the billboard ads here in Houston about every two weeks
or so on average.
However, even though this is a humid and damp climate, I don't think that
"critical dampness" is the reason they change 'em so often. Usually I figure
its 'cause they got a new customer.
Let me know if there's anything else you need on this. I'm sure you can tell
my level of expertise by now, and I can feel your confidence in me surging.
From: PEC - Lake City [mailto:pec(--nospam--at)isgroup.net]
Sent: Monday, March 13, 2000 1:37 PM
Subject: Natural Frequency of Billboard
Can anyone recommend a good reference for determining the natural frequency
and critical damping ratio for billboards?