[TowerTalk] Tower Foundation Pad Removal

[Patrick Greenlee]

Another consideration is to leave the existing base in place and 
excavate a new hole next to it.  Then drill and dowel into the old with 
rebar to add/bond the old to the new.  If you don't fully trust this 
approach then make the new part full sized and not dependent on help 
from the old even though it will help quite a bit.

Patrick NJ5G

On 8/17/2014 12:27 PM, Kenneth Goodwin wrote:
> As part of a tower replacement project, a possible plan is to remove the
> existing foundation in one piece using an infinitely sized crane attached to
> the tower anchor bolts.  The pad is 6.5 x 6.5 X 4 feet (6 cu yards
> estimated).  An effort to break the dirt from around the foundation would be
> attempted (water hose and some penetrating device inserted down the side of
> the foundation pad).  The remaining hole would be used for the new
> foundation installing new rebar as per Rohn SSV foundation drawings (Rohn
> SSV tower, 60 feet using 6N, 5N and 4N twenty foot sections).  Any reason
> not to consider this as a possible plan for the new tower foundation?
>
>   
>
> Secondary question: Do you tie the tower and the rebar into a ground
> connection at the bottom of the foundation?  Years ago one isolated the
> rebar but I think the thoughts today are just the opposite.
>
> Ken K5RG
>
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