[TowerTalk] 6000 psi grout

[Jim McDonald]

Is my assumption correct that using grout under a US Tower T-base makes it
impossible to remove and reuse the T-base if the tower is relocated?  Or
does the T-base not adhere to the grout?

My tower has been installed twice before this installation as I relocated.
I don't remember seeing anything about grout in the UST instructions until
this installation.  The previous installations were in 1995 and 1999.

Jim N7US



-----Original Message-----
 
In a message dated 5/24/2011 7:10:29 A.M. Pacific Daylight Time,  
towertalk-request at contesting.com writes:

>    I'm installing a US Tower MA40.  The  specifications call for filling 
the 
area between the base of the mast  mount and the top of the concrete with 
high strength grout.  What is  this stuff and where would I get it?


    Ahh, good question. What you want is NON-shrink  outdoor grout - the 
stuff for the bathroom is not suitable. 
 
    You might be able to find it at your hardware  store. Look at the specs 
carefully to make sure you've got the right  stuff.
 
    I get mine at a masonry supply store. It comes in  bags and you mix it 
with water. It needs to be pretty stiff or else it'll just  run out of where

you want it. 
 
    What happens is that the grout becomes part of  the support for the 
tower base so the stresses just aren't on the bolts. 
 
Cheers,
Steve     K7LXC