[TowerTalk] Rohn 25G clone born few minutes ago...

[Ed Sawyer]

Congrats Douglas!

 

The Concrete manuals say that concrete will reach 75% of its 28 day rated
strength in 7 days.  Almost 90% in 14 days.  For tower building, 14 days is
already overkill.  7 days is plenty.  Obviously, the other question is what
was the specified mix strength.  If you have 5000PSI concrete, then its
already stronger than typical building foundation concrete after only 7 days
of cure.

 

Ed  N1UR