[TowerTalk] best way to seal concrete with cut off tower section

Clay Autery cautery at montac.com
Tue Jul 11 19:22:07 EDT 2017

Ideally, you would pump the same type concrete through a tube run down
to the bottom of each leg hole (after having used tube to blow air/water
through the holes to flush them out.  As the concrete begins to run out
the top, slowly withdraw the tube at a rate slightly less than the
concrete pump rate so that you continue to see a little coming out the
top.... until the tube comes all the way out...

The holes will be completely filled with a substance with nearly/exact
same thermal expansion coefficient.

THAT is the OCD solution....

Jake-leg solution is to plug back some depth using closed cell foam or
other substance, then fill the top void above the plug with concrete,
two part epoxy, et al....


Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389

On 7/11/2017 1:41 PM, mike stokes wrote:
> I am in the planning stages of replacing 95' of Rohn 25 with 100' of Rohn
> 45.  The 25 has the bottom section concreted in.  I plan on drilling and
> epoxying a pier pin for the Rohn 45.  When I cut it off the 25, the holes
> in the legs will be exposed.  What is the best method to seal the leg holes
> to ensure they don't get water in them and freeze ?
> Thanks in advance.

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