[TowerTalk] Rebar schedule

[John Lemay]

Don

 

I see you've already had some replies and suggestions.

 

I'm not a PE, but I am a chartered engineer here in the UK. However, my
expertise is not in foundation design ! I'll go on experience and intuition.

 

A "yard" of concrete is not likely to be enough. This is particularly
important (point has already been made), if the mast could fall on people or
property. I would suggest that two cubic yards is likely to be the right
sort of volume (that will weigh something over four tones). Your four fixing
points should not be close to the edge, so with 42" centers, I would suggest
the base would be 60" across. Then work out the depth to give yourself the
recommended volume. If you can, make the sides vertical and the base
horizontal, and don't use formwork - simply pour the concrete into the hole
against the earth. Don't worry if there's a bit of water in the bottom,
concrete sets under water.

 

As for the rebar, which was your original question, sorry I can't help. In
the UK, many foundations such as this are simply mass concrete, and that's
how my own mast is.

 

Good luck.

 

John G4ZTR

 

 

  _____  

From: Don Bowen [mailto:don.bowen at earthlink.net] 
Sent: 04 May 2012 12:33
To: John Lemay
Cc: TOWERTALK at contesting.com
Subject: Re: [TowerTalk] Rebar schedule

 

On 5/4/2012 3:07 AM, John Lemay wrote: 

Hi Don

 

Not enough information !

 

How tall is the mast ?


To the top of the fourth section is thirty six feet.




Will it be guyed or freestanding ?


Free standing




What will you put on top ?


hy-gain TH-3JRS triband and a Yeasu G-450A rotator.




What soil do you have 3ft down ?


Gravel, rocks, clay.




 

Regards

 

John G4ZTR

 





-- 
Don Bowen           KI6DIU
http://www.braingarage.com/Dons/Travels/journal/Journal.html



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