[TowerTalk] Tower Collapse - New Kensington, PA @ K3MJW

[Roger (K8RI)]

Pete Smith wrote:
> I don't agree - my Rohn 25 would almost certainly fold just like that, 
> above the second guy station, if the wrong top guy failed in a high wind, 
> and it is well within ratings.
>   

If you've ever seen the ROHN add showing the weights applied to two 
towers demonstrating the lateral strength, your 25G is also considerably 
stronger than the old American Steel towers in the lateral direction.

But as others have said, something landing on a guy and a guy breaking 
is something few towers can handle. The old AS towers used a single 
horizontal brace every two feet.  The 25G uses horizontal braces about 
16 apart plus diagonal graces.  The AS is "springy" and really needs 
additional guys more closely spaced the way they are generally used.

73

Roger (K8RI)
> 73, Pete N4ZR
>
> At 10:10 PM 2/18/2009, WA3GIN wrote:
>   
>> Hmmm,
>>
>> Doesn't look like that tower was spec'd to go 100ft, esp. with the number of
>> antennas attached.
>>
>> Better Luck Next Time,
>> wa3gin
>>
>> ----- Original Message -----
>> From: "Charles Mills" <w3yni1 at gmail.com>
>> To: "Towertalk" <towertalk at contesting.com>
>> Sent: Wednesday, February 18, 2009 9:09 PM
>> Subject: [TowerTalk] Tower Collapse - New Kensington, PA @ K3MJW
>>
>>
>>     
>>> http://www.flickr.com/photos/11829197@N06/3291969262/
>>>
>>>       
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk at contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>>     
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
>