[TowerTalk] Anchor Bolt Material

[Charles Gallo]

Be a bit careful in your analysis. Bolts usually have a rolled and or forged thread (well, hot or cold rolled). Cut threads are measurably weaker than a rolled thread. Some machine shops CAN roll a thread, but not all, and they will cut the thread. Generally this is fine, but if it is near the limits (not a good idea anyway, safety factors are a good thing) it can be an issue

--  
73 de KG2V
Charlie

> On Oct 15, 2014, at 8:37 PM, Marvin Shelton <marvshelton at me.com> wrote:
> 
> good idea, but I wonder if I can find a 24" long 2" diameter grade 55 bolt and have the top six inches machined?
> 
> 
> Marv - WA2BFW
> 
> Sent from my iPad on the iCloud
> And YES it's cool!
> 
>> On Oct 15, 2014, at 5:03 AM, TexasRF--- via TowerTalk <towertalk at contesting.com> wrote:
>> 
>> How about larger anchor bolts with upper six inches or so machined to fit  
>> the base holes? 
>> 
>> Could the base holes be reamed to a larger size?
>> 
>> K5GW
>> 
>> 
>> 
>> 
>> In a message dated 10/15/2014 12:09:54 A.M. Central Daylight Time,  
>> marvs at att.net writes:
>> 
>> the base  is designed for 1-1/8 bolts.
>> 
>> Sent from my iPad
>> And YES it's  cool!
>> 
>>> On Oct 14, 2014, at 9:36 PM, <ve4xt at mymts.net>  <ve4xt at mymts.net> wrote:
>>> 
>>> Use larger bolts?
>>> 
>>> Just sayin'
>>> 
>>> 73, Kelly
>>> Ve4xt
>>> 
>>> Sent from my iPad
>>> 
>>>> On Oct 14, 2014, at 11:00 PM, "Marv  Shelton" <marvs at att.net> wrote:
>>>> 
>>>> I asked a PE at  work and since the holes are so much bigger than the
>> bolt. ( the holes are  2.5" diameter, the bolts only 1.125") he said the rated 
>> strength of the epoxy  is only good if the hole is no more than a half inch 
>> bigger in diameter than  the bolt. I confirmed this by talking to one of 
>> the epoxy product  manufacturers.
>>>> 
>>>> Sent from my iPad
>>>> And YES  it's cool!
>>>> 
>>>>>> On Oct 14, 2014, at 8:23 AM,  K7LXC at aol.com wrote:
>>>>>> 
>>>>>> Anchor bolt  update:
>>>>> Thanks for all the input everyone. It looks like  epoxy, or at least
>> commercial grade stuff dispensed with a caulking gun is out  as a potential 
>> solution. It seems like the holes I made are too  big.
>>>>> So now I am looking at anchoring cement and trying to  talk to
>> industrial contractors to see if there is another  alternative.
>>>>> 
>>>>>     So how  did you determine that your new holes won't work for
>> putting in your anchor  bolts? The epoxy is stronger than the concrete so it 
>> seems to me that's it's a  non-issue. Are you over-thinking this?
>>>>> 
>>>>> Cheers,
>>>>> Steve     K7LXC
>>>>> TOWER  TECH -
>>>>> Professional tower services for  amateurs
>>>>> Cell: 206-890-4188
>>>> _______________________________________________
>>>> 
>>>> 
>>>> 
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