In a message dated 11/12/1999 8:29:20 AM Eastern Standard Time, [log in to unmask]
writes:
> Keep in mind thermal stress on the masonry as the sun goes past each day. On
> a tower structure there is a twisting movement from sun heat.
>
> ][<en
Ken, is twisting movement lateral or vertical? Do you mean a tower structure
where height >= 4xwidth, or just any exposed structure?
Your old friend, Chubby