[AF] The SF Overpass

[Dana Puopolo]

FYI..I have been trained in handling asbestos. If bound properly, it is quite
safe. Many buildings use the space between the suspended ceiling and the next
floor as a return air plenum, Many of these floors' beams are coated with
asbestos, and the air quality (which must be frequently measured in an
asbestos 'managed' building such as this) remains high.
-D 

------ Original Message ------
Received: Tue, 01 May 2007 02:46:10 PM EDT
From: Craig Bowman <craig1 at shianet.org>
To: The Alternate Frequency <af at radiolists.net>
Subject: Re: [AF] The SF Overpass

It has been years since I had anything to do with the master FM combiner 
there but I do not remember that typical gray asbestos insulation 
sprayed on the I beams on (as I remember) 110.

Craig Bowman


Phil Alexander wrote:
> On 1 May 2007 at 9:13, Dana  Puopolo wrote:
>
>   
>> The overpass had NO fire retardent. The towers had some type of rated fire
>> retardent. No, it wasn't asbestos, but that's not the only one out there.
>> http://en.wikipedia.org/wiki/Passive_fire_protection
>>     
>
> If memory serves, the twin towers DID have asbestos concrete sputtered over
> the beams part way up the towers and further application was stopped by
> the environmental outcry WRT asbestos. Beyond that point, I'm not sure
> if the steel was naked or some other less effective coating was used.
>
> The design of the towers WITH asbestos insulation of the steel was to
> withstand a direct hit by a fully loaded 707 of the largest configuration
> (similar to the old AF-1) because that was the biggest plane flying when
> the structures were designed.
>
> Had the insulation been carried out as designed, the structures might 
> have stood, and at the very least far more time to evacuate would have
> been available.
>
> Once again the law of unintended consequences rears its ugly head.
>
> ---------------------------------------------
> Phil Alexander, CSRE, AMD
> Broadcast Engineering Services and Technology 
> (a Div. of Advanced Parts Corporation) 
> Ph. (317) 335-2065   FAX (317) 335-9037
>
>
>
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