For most purposes 7-10 days should be enough to begin building a tower. No
need to wait one month unless you are building a monster tower.
Dale - N3BNA
From: Ed Sawyer <sawyered@earthlink.net>
To: towertalk@contesting.com
Sent: Monday, January 11, 2016 11:12 PM
Subject: Re: [TowerTalk] Rohn 25G clone born few minutes ago...
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
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