[TowerTalk] Gravel under forms

[Wayne Kline]

Chris,



>From your description your either using a pier pin .  I do all my cement pouring and finishing then  pound/insert the pier pin and finish off any disturbed finish.

 Again from your description with a  pier pin you do NOT need gravel In the bottom of the excavate hole ( that was for H2O  drainage inside the vertical tubes )



I have never used a vibrator on a Rohn  tower have that be  65/55/45/25    I have for big pours Crank ups  and SSVT with elevated sonna tubes.



A 2X2 or 2X3 poking around your Rebar cage  as the  mix  is poured in is A-OK



I am a belt and suspender type   most of my pours have been 3500LB  a few 4000lb  for free standing towers



Wayne W3EA

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________________________________
From: TowerTalk <towertalk-bounces at contesting.com> on behalf of Chris Hoelzle <w7mi.chris at gmail.com>
Sent: Tuesday, September 3, 2019 9:03:49 PM
To: TowerTalk at contesting.com <TowerTalk at contesting.com>
Subject: [TowerTalk] Gravel under forms

Hello - I am putting up two towers. A 55g and a 45g. I have built my cages,
and soon, I will dig my holes for the cages and cement.

My questions are:
Do you use gravel in the bottom of the holes?
What size gravel
Does it need to be tamped down
How do you support the anchor rod while the cement is setting up
Do you use a Vibrator to get the cement to release the air
and finally
Do you use 4000psi cement?

Thanks for your advice

--
W7MI
Chris Hoelzle
Bandon, OR
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