Ufer rebar size and connection location?

[owkaye]

New project. Homeowner will use 1/2 inch rebar in his 16" by 20" footing poured on undisturbed ground. He welds the rebar together rather than wire tying it. He wants to bring one end of a stick of rebar up out of the footing and into the hollow wall space beneath the main disconnect so I can attach my ground wire to it.

1- Is 1/2 inch rebar thick enough to act as a Ufer/CEE or must it be 5/8 inch or thicker?

2- Can I clamp my #4 ground wire to the exposed rebar inside the wall cavity, or must this connection be embedded in the poured concrete?

 

[Fulthrotl]

New project. Homeowner will use 1/2 inch rebar in his 16" by 20" footing poured on undisturbed ground. He welds the rebar together rather than wire tying it. He wants to bring one end of a stick of rebar up out of the footing and into the hollow wall space beneath the main disconnect so I can attach my ground wire to it.

1- Is 1/2 inch rebar thick enough to act as a Ufer/CEE or must it be 5/8 inch or thicker?

2- Can I clamp my #4 ground wire to the exposed rebar inside the wall cavity, or must this connection be embedded in the poured concrete?

most of the ufer's i have seen were 1/2" rebar.
never really thought that much about it.

the only way your connection can be imbedded is if the
connection type is approved for embeddng.

cadweld and hypress come to mind. most of the time,
you put a two gang ring near the connection point in
the wall, so it's accessible.

 

[ActionDave]

250.52 and 250.68 are your references.

 

[tom baker]

Use an acorn clamp on the exposed rebar, put a 2 gang mud ring in the wall so the connection is accessible. Most often the AHJ will want to see the rebar before the pour

 

[infinity]

New project. Homeowner will use 1/2 inch rebar in his 16" by 20" footing poured on undisturbed ground. He welds the rebar together rather than wire tying it. He wants to bring one end of a stick of rebar up out of the footing and into the hollow wall space beneath the main disconnect so I can attach my ground wire to it.

1- Is 1/2 inch rebar thick enough to act as a Ufer/CEE or must it be 5/8 inch or thicker?

2- Can I clamp my #4 ground wire to the exposed rebar inside the wall cavity, or must this connection be embedded in the poured concrete?

20' of 1/2" rebar is the minimum needed to qualify as a CEE. The GEC connection can be embedded or exposed.

 

[owkaye]

I understand what needs to be done now. Thanks for all the replies.

 

[Flanative]

I know this is an old thread but it has some relevancy to a recent situation. I have an inspector telling me if the connection is made in the void of the wall the void has to be filled up with concrete afterwards because the 5’ piece bent up leaves only 15’ encased. I told him its tied to the rest of the steel so its more than 20’. He doesn't understand and wants me to add ground rods

 

[roger]

I know this is an old thread but it has some relevancy to a recent situation. I have an inspector telling me if the connection is made in the void of the wall the void has to be filled up with concrete afterwards because the 5’ piece bent up leaves only 15’ encased. I told him its tied to the rest of the steel so its more than 20’. He doesn't understand and wants me to add ground rods

I agree, he doesn't understand, good luck educating him.

Roger

 

[infinity]

I know this is an old thread but it has some relevancy to a recent situation. I have an inspector telling me if the connection is made in the void of the wall the void has to be filled up with concrete afterwards because the 5’ piece bent up leaves only 15’ encased. I told him its tied to the rest of the steel so its more than 20’. He doesn't understand and wants me to add ground rods

Speak to his boss as he has no clue. The wording of the NEC is clear that several pieces of rebar tied together can get you the required minimum of 20' of rebar.

 

[Flanative]

Thats the thing. Its his boss telling him this.

 

[petersonra]

I know this is an old thread but it has some relevancy to a recent situation. I have an inspector telling me if the connection is made in the void of the wall the void has to be filled up with concrete afterwards because the 5’ piece bent up leaves only 15’ encased. I told him its tied to the rest of the steel so its more than 20’. He doesn't understand and wants me to add ground rods

The part that's in the wall doesn't count as part of the CEE anyway.

 

[Greentagger]

I know this is an old thread but it has some relevancy to a recent situation. I have an inspector telling me if the connection is made in the void of the wall the void has to be filled up with concrete afterwards because the 5’ piece bent up leaves only 15’ encased. I told him its tied to the rest of the steel so its more than 20’. He doesn't understand and wants me to add ground rods

How can he inspect it if it’s already been poured?

 

[infinity]

Thats the thing. Its his boss telling him this.

Well then you're doomed. You're dealing with two people who know little about the NEC and should find a refresher course on Article 250. Wasn't the CEE inspected before the pour?

 

[acin]

We have a cce as part of the fnd steel insp on our permit card

 

[Flanative]

Well then you're doomed. You're dealing with two people who know little about the NEC and should find a refresher course on Article 250. Wasn't the CEE inspected before the pour?

Yes it was.

 

[infinity]

Yes it was.

It was already inspected so then what is the issue?

 

[Flanative]

It was already inspected so then what is the issue?

The inspector who inspected it resigned and now a third party agency has taken over