[TowerTalk] Tower Base Anchor Bolts

[Grant Saviers]

McMaster has 1.125 by 36" depth SDS-Max.  $$ but I don't think you need 
to go deeper than 18" - see the specs below.

I think it is very important to use the specified hole diameter for the 
structural epoxy you plan to use.  The Simpson catalog shows maximum 
tensions for 1" bolts.
http://www.strongtie.com/ftp/catalogs/c-sas-2012/C-SAS-2012.pdf

Hole preparation is super critical, buy the Simpson wire brush to fit 
the hole, use an air compressor, a blow gun extension, and also very 
good eye protection.

Grant KZ1W


On 11/9/2013 11:37 AM, Mike VE3YF wrote:
> Hi:
>
> I have ran into a slight problem and need some help.
>
> I am re-using my tower base for a new tower and the bolts that I 
> require are 1" x 27" and I have opted for the ASTM F1554 Grade 55, and
> to leave 6" above the concrete which means 21" into the concrete.
>
> However in my area all I can find for concrete bits that are 18" long 
> x 1.125" diameter.
>
> However I can get a 22" bit x 1.250" Diameter
>
> Is better to stay with an 18" x 1.125" hole and cut 3" off the bottom 
> of the bolt or go with a 22" x 1.250" hole and just add more epoxy.
>
> Any help in this matter is greatly appreciated.
>
> Tnx.
>
>
>
> 73 De Mike
> VE3YF
>
> http://www.ve3yf.com
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