[TowerTalk] Nube rebar question

[Bill via TowerTalk]

Do it like the pros.
 
Rod chairs (sometimes go by other names) made of plastic or  metal, allow 
the bar to sit above the ground. Cost is minimal.  They  can be obtained from 
your concrete supplier or from Lowes or Home  Depot.
 
The three inch number is not critical.  Building inspectors  don't really 
care if it is 2 or 3 inches.
 
K4XS
 
 
In a message dated 12/16/2014 5:27:23 P.M. Coordinated Universal Tim,  
kilo6dko at gmail.com writes:

I have  never worked with rebar or concrete but it seem fairly strait
forward in  building the cage and pouring the concrete. I have read the the
rebar  cannot be with in 3" of the dirt or it will rust and fall apart. What
do  you do in the bottom where the rebar sits on the dirt? Is this just  a
sacrificial  bit?

Thanks
73
Kent
K6DKO
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