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#15772 - 10/29/02 11:24 PM Ufer conn, acorn?  
Cindy  Offline
Joined: Jun 2001
Posts: 196
so what is the problem with using acorns to connect the g.e.c. to the ufer in a garage wall?

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#15773 - 10/30/02 01:11 AM Re: Ufer conn, acorn?  
sparky66wv  Offline
Joined: Nov 2000
Posts: 2,236
West Virginia
Perhaps the listing thing rears its ugly head?

What would be listed for rebar?

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#15774 - 10/30/02 07:25 AM Re: Ufer conn, acorn?  
sparky  Offline
Joined: Oct 2000
Posts: 5,311
from the hip~


#15775 - 10/30/02 11:33 AM Re: Ufer conn, acorn?  
Chris Rudolph  Offline
Joined: May 2001
Posts: 160
Winter Park,Fl USA
Does the Ufer system come to the outside world with a smooth grounding rod,if so I believe that the acorn connector is OK.
Whenever we start new construction ,I tie into the footing rebar ,a 5/8in grounding rod and put a right angle bend so that it comes out of the foundation wall near the meter socket at grade level.

#15776 - 10/30/02 10:42 PM Re: Ufer conn, acorn?  
edmat  Offline
Junior Member
Joined: Oct 2002
Posts: 3
Hot Springs, AR
Connection to E.G.C. To a ufer system A burndy or other brands of split-bolt cablewire connectors are aproved for the connection to E.G.E. also you can cadweld.
But the best way to install a ufer is to install 20ft of #4 bare the bottom of the footing use tie wire to make contact with the rebar leave enough slack to allow you to make a connection to out of the concret cement wall.


#15777 - 10/31/02 12:48 AM Re: Ufer conn, acorn?  
Cindy  Offline
Joined: Jun 2001
Posts: 196
if i remember right, inspectors have told me they arent listed for using the acorns on #4 spiral ribbed rebar ufers, but are ok on ½ in. ground rods, but i'm not sure, all i know is what i read on them, that tagged clamps can be direct buried or encased in crete per labels.

chris, sounds like a good system, but i dont think a Ufer is supposed to be exposed to any weather is it? by definition the ufer is a #4 reinforcement-bar encased in concrete. if you bend rebar out of the foundation outdoors arent you worried that the weather will rust it out eventually? maybe i didnt understand.

edmat, i like the 20' copper too, but i always worry that it will get damaged between exiting the foundation and landing on the grounding bus

#15778 - 10/31/02 04:26 AM Re: Ufer conn, acorn?  
nesparky  Offline
Joined: Jun 2001
Posts: 642
Burdy and others make rebar to wire clamps that are certified for concrete and/or direct burial. They come a variety of sizes, #4 wire to 1/2 rebar were not too expensive. I use these item on UFER's and pool grounding and bonding. Easier than an acorn clamp and no grief from the inspectors.


#15779 - 10/31/02 09:20 AM Re: Ufer conn, acorn?  
Chris Rudolph  Offline
Joined: May 2001
Posts: 160
Winter Park,Fl USA
The connection to the outside world is an 8ft ,5/8in smooth ground rod that is tied into the footing rebar(Ufer system).It is bent at 90deg and comes through the foundation wall(Wall,mono slab,or stem wall) at grade level and ties into the EGC(#4 bare Cu) with an acorn clamp near the meter socket.

#15780 - 10/31/02 09:19 PM Re: Ufer conn, acorn?  
stamcon  Offline
Joined: Mar 2001
Posts: 329
So San Francisco CA
Chris, how do you tie the ground rod to the rebar?

#15781 - 10/31/02 09:54 PM Re: Ufer conn, acorn?  
spyder  Offline
Joined: Oct 2002
Posts: 210
I also tiewire #4 to the rebar at the bottom of the footing at least 20ft in length. I leave enough slack and bring it up past grade level outside of foundation, so it does not get buried during back fill. I bring it into the main disconnect when i run my direct bury service conductors.

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