Yep, 1/2x12bb are the ones……grade 36 ?
Sent from my iPad
> On Apr 4, 2022, at 10:16 AM, Jon Zaimes, AA1K via TowerTalk
> <towertalk@contesting.com> wrote:
>
> Tower hasn't been specified but for Rohn 25 there are two bases that may be
> bolted to the concrete.
> BPH25G is hinged base for bracketed or guyed towers. It uses 1/2" bolts but
> the engineering diagram doesn't give any details:
> https://static.dxengineering.com/global/images/technicalarticles/roh-bph25g.pdf
> Rohn part number is 1/2X12BB: https://www.dxengineering.com/parts/roh-1-2x12bb
> 25GSSB is base plate for self-supporting towers. It uses 5/8" bolts.
> Engineering diagram doesn't specify grade per se but gives shear and tension
> specs: https://www.cableandwireshop.com/manuals/25G-17.pdf
> Rohn part number is 5/8X12BB: https://www.dxengineering.com/parts/roh-5-8x12bb
> Rohn concrete base BPC25G has single center hole for pier pin.
>
> 73/Jon
> Jon P. Zaimes, AA1K Tower climber for hire http://www.aa1k.us/ Cell:
> 302-632-2353email: jz73@verizon.net or aa1k@arrl.net
>
> -----Original Message-----
> From: tommy@k6ye.com
> To: TOWERTALK@CONTESTING.COM
> Cc: TOMMY@K6YE.COM
> Sent: Mon, Apr 4, 2022 12:45 am
> Subject: Re: [TowerTalk] Rohn anchor bolts, grade?
>
> The bolts should be listed on the "Tower Engineering Sheets" AKA
> "Structural Analysis Sheets." Tower Typical Standards are bolts
> designated as ASTM A325 which corresponds to Grade 5, while ASTM A490
> corresponds to Grade 8.
>
> I hope that helps.
>
> Semper Fi,
>
> Tommy - K6YE
> DX IS and CW RULES
>
>
>> On 2022-04-03 17:06, john@kk9a.com wrote:
>> I am not sure what a Rohn anchor bolt is, usually the tower either sits
>> on
>> top of the concrete with a pier pin or a tower section is embedded in
>> the
>> concrete. FWIW, most structural bolts are hot dipped A325.
>>
>> John KK9A
>>
>> WW3S wrote:
>>
>> Grade 8, grade 5 , what?
>>
>> Sent from my iPad
>>
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