[TowerTalk] AB-105 engineering data

[donovanf at starpower.net]

Guy,

As far as I'm aware, there are no engineering specifications in the public domain that answer your questions about AB-105 and Rohn 55 tower. 

Unfortunately, the MIL-A--12868C(EL) military specification for AB-105 tower is a procurement specification and it does not provide the technical specifications you are seeking. You can find the specification here:

http://docimages.assistdocs.com/watermarker/transient/9A1FCC93EA2D4202857C31A841DB4395.pdf

I have a pdf of the AB-105 Technical Manual, which I'll send to you in a separate e-mail.  Its an installation manual and does not provide the technical specifications you are seeking.

This leaves you with the option of contacting a registered P.E. There are several P.E.s on towertalk who may be able to perform the required engineering analysis for you.  You shouldn't expect them to perform this analysis for free!

If the P.E. does not have engineering data specifying Rohn 55 Tower section properties, he can find on Rohn Drawing number "C630655 R 9" titled "55G Section Drawing" dated 26 Feb 1988.  For many years this drawing has been at the end of the Rohn 55 section of  the Rohn catalog.   I can supply the same engineering data specifying AB-105C/FRC tower section properties. 

73
Frank
W3LPL 



---- Original message ----
>Date: Fri, 19 Jun 2009 00:29:48 -0500
>From: K4SAV <RadioIR at charter.net>  
>Subject: Re: [TowerTalk] AB-105 engineering data  
>To: towertalk at contesting.com
>
>Go here:
>http://www.assistdocs.com/search/search_basic.cfm
>and in the "Words in Title" box put AB-105.  That should get you the MIL 
>spec document.
>
>I also have the tech manual for the AB-105 in pdf form but I can't 
>remember where I got it.  The manual number is TM 11-2615A and the Title 
>is "Antenna Support AB-105C/FRC".  If no one posts a link to it, I will 
>email it to you.  It's 1.5MB.
>
>Jerry, K4SAV
>
>Guy Molinari wrote:
>> Hi all,
>>    I'm looking for the engineering data for ab-105 and rohn 55.   I will need to submit building permits for new towers and need to include engineering data.
>>  
>> Specifically these need to support 85 mph winds, a snow load of 25pd and a seizmic level D-1.
>>  
>> An engineers "wet stamp" is not required.
>>  
>> Can anyone help out?
>>  
>> Thanks and 73,
>> Guy, N7ZG
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