[TowerTalk] #10 Rebar vs 1.250 Cold Roll Steel...???

[Bob Maser]

If you weld diagonals onto the vertical struts cold rolled steel will be 
fine and stronger.  Also weld some "feet" on the bottom and you'll pull the 
concrete out of the hole before the rods come out.  The size of the rebar is 
not the issue, it's the brittleness after welding to it that is the problem.

Bob
----- Original Message ----- 
From: "Hank Lonberg" <kr7x1 at verizon.net>
To: "'Bill Winkis'" <kc4pe at bellsouth.net>
Cc: <towertalk at contesting.com>
Sent: Monday, October 13, 2008 8:04 PM
Subject: Re: [TowerTalk] #10 Rebar vs 1.250 Cold Roll Steel...???


> Bill:
>
> #10 bar is not a very common size. That is why it is not
> readily available. Go with #9's or #11's. Just prorate their
> spacing base on the area difference. I believe that the
> foundation calls for #10 bar vertical at the corners, IF that
> is the case substitute #11's for the #10's or use 3-#9's on
> each face vertically (ends up being 8 of the #9's) I think
> they are 5'-0" long. This should work fine business.
>
> You are right the deformations are what you want to develop
> the bar strength and bond with the concrete. Smooth bars are
> not what you want to use.
>
> Good luck
> Regards
> Lonberg Design Group, Ltd.
> H.S. Lonberg, P.E.,S.E.
> President
>
>
> -----Original Message-----
> From: towertalk-bounces at contesting.com
> [mailto:towertalk-bounces at contesting.com] On Behalf Of Bill
> Winkis
> Sent: Monday, October 13, 2008 9:03 AM
> To: towertalk at contesting.com
> Subject: [TowerTalk] #10 Rebar vs 1.250 Cold Roll Steel...???
>
> Am trying to get my LM70 back in the air...... have the
> concrete mount ears made and ready, however #10 rebar is not
> to be found  in my local area....will have to be orderd out of
> Atlanta for $200.00 per 20 feet....however the steel
> distributor says why not use "Cold Rolled Steel"...??
> Says 1.250 inch CRS is much stronger than #10 rebar and it
> only costs $148.00 per 20 foot stick...He says its hard to
> weld rebar properly without weakening the joint, that's why
> they wire most of it....where as CRS is easy to weld without
> any weakening of the joint....
>
> Why use rebar..is it because of the spiral wrap whic give the
> rebar a added locking strength...??
>
> -Bill
> kc4pe at bellsouth.net
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