[TowerTalk] Tower Base Anchor Bolts
grants2 at pacbell.net
Sat Nov 9 16:36:06 EST 2013
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.
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.
On 11/9/2013 11:37 AM, Mike VE3YF wrote:
> 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.
> 73 De Mike
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