[TowerTalk] New Tower Standard Update
nv8a at att.net
Sat Nov 19 11:20:17 EST 2005
Is the wind zone information available other than by buying the whole
On 11/19/05 11:11 am donovanf at starpower.net tossed the following
ingredients into the ever-growing pot of cybersoup:
> For those who missed this last month, copies of TIA-222-G can
> be purchased from TIA, but they are exceptionally expensive.
> However... there is a pdf presentation on the web that contains
> many of the key differences in TIA-222-G, including the new
> wind and ice zone maps.
> One of the changes is in the wind zones. TIA-222-G contains
> over a hundred pages of wind and ice zone information for
> every county in the US.
> TIA-222-G has changed the way that windspeed is specified,
> from the traditional "mile of wind" approach to a three second
> maximum gust specification. The TIA-222-G minimum wind
> speed requirement (applies to most counties in the US) is now
> 90 MPH three second gust, which is equivalent to a 75
> MPH "mile of wind", 65 MPH sustained wind for 10 minutes or 62
> MPH sustained wind for one hour.
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