[TowerTalk] [Bulk] Re: Anchor Bolt Material

[mike repinski via TowerTalk]

 This might be costly but could you have some 2 1/2 sleeves made up and use your original bolts? Some 2 1/2 inch diameter rod drilled to accept your bolts and welded in.

 

-----Original Message-----
From: Grant Saviers <grants2 at pacbell.net>
Cc: towertalk <towertalk at contesting.com>
Sent: Wed, Oct 15, 2014 12:38 am
Subject: Re: [TowerTalk] [Bulk] Re:  Anchor Bolt Material


This recommendation fits with what I've read about epoxy anchoring, 
holes should be close to the bolt size plus 1/16 - 1/8" clearance.

I suggest you investigate the grouting materials in more depth or drill 
new holes, offset from the existing ones as suggested and fill the old 
holes.

Some quick grout finds via google:

e.g. http://www.lmcc.com/products/applicationguide/how_to_grout.asp
specifies conditions for grout up to 4" thick.

or 
http://www.buildingsystems.basf.com/p02/USWeb-Internet/buildingsystems/en/function/conversions:/publish/content/microsites/buildingsystems/products/items/pdfs/basf-masterflow-110-an-tds.pdf
"typically the diameter of the hole should be 3 times the diameter of 
the post"

Grant KZ1W



On 10/14/2014 9:00 PM, Marv Shelton 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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