I am trying to plan my ICF build.  There will be a 6 inch concrete core with horizontal and vertical rebar and I intend to use Simpson ICF connectors to hang the ledger boards.

My question is whether you ever get problems with the rebar getting in the way of the ICF connectors or whether the connectors are sufficiently larger than the bit that gets screwed into them to give enough "play" when placing them in the forms.

Thanks
Andrew

Vertical rebars won't be any problem since they can move sideways if need be. Horizontal rebars shouldn't be a problem unless they're too close to the inner foam, which I don't think will usually occur. The thing you do want to plan for is to avoid the connectors from interfering with the joist hangers. Plan your spacing so that the connectors fall between planned joist spacing.

Thanks for that. Don't the connectors go more than half way across the concrete core? If they do, doesn't the horizontal rebar get in the way?

The connector tabs are 6" long, minus 2.5" for foam leaves 3.5". The horiz rebars are generally staggered toward one side or the other so that the verticals drop between them. They are not in the center of the block. Just make sure the horiz ones that are in line with the connector tabs are toward the outside foam. Then you shouldn't have any problem. If you can arrange for the ledger board to be near the mid line of a course of blocks you'll be away from the horiz rebar. Also, the tabs span only about 1.5" vertically since they are on the 45° side of the connector. You really should have plenty of vertical space to set the connectors and not interfere w/ the rebar. And you do have about 1" either side of center for vertical adjustment space for the J bracket.

Oh, are you using 4" or 6" ICFs? I don't remember what you said in your previous posts. If you're using 4" then you do have to be more careful about connector vs. rebar placement.

aa_uk -- dmaceld is correct. It is best to pre-plan where this rebar will be in the wall. Nevertheless, occasionally (unless you stack it all yourself) you will need to clip a corner off of one or two to make them flush with the wall. After the guys have to work to get these in they will listen more attentively on the next go-round. Regards.

Thanks for the replies. I am doing it myself so it's down to me to get the planning right!