ddavison
New Member
Posts:4
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| 07 Feb 2009 08:28 PM |
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From the "beam pocket" thread:
"just the usual doubled 2x10's, anchor bolted 5/8", 16" OC, staggered top and bottom"
Chris, or anyone else for that matter, when you set your bolts for ledgers, how much foam do you remove around the bolt location?
Thanks |
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Chris Johnson
Advanced Member
Posts:878
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| 07 Feb 2009 09:15 PM |
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4 1/2" |
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| Chris Johnson - Pro ICF<br>North of 49 |
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lkazanov2
Basic Member
Posts:177
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| 07 Feb 2009 09:31 PM |
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PCA 100-2007 (6.3.2) recommends 4" for 1.5" forms then 1" for each additional 1/2" of foam thickness. So for the usual 2.5" form, 6" foam crop.
Leonard
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ddavison
New Member
Posts:4
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| 07 Feb 2009 10:12 PM |
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Hole saw? |
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arkie6
Veteran Member
Posts:1453
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| 09 Feb 2009 12:33 AM |
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You can use a 6" holesaw, but most will only cut ~1-3/4" deep, so you will likely be left with another 3/4" or so to finish the cut. You can use a keyhole saw or hot knife to finish the cut.
You might also want to check out the 6" diameter anchor tunnels available from Windlock, or just google "anchor tunnel" for more info. |
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ddavison
New Member
Posts:4
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| 09 Feb 2009 07:59 PM |
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Thanks |
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irnivek
Basic Member
Posts:229
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| 12 Feb 2009 09:26 AM |
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think I saw a new cordless hot knife advertised somewhere. nice to keep the foam beads out of the wall. Anybody used it?
Kevin |
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roch
New Member
Posts:25
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| 12 Feb 2009 07:51 PM |
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or you can use anchor bolts with a 2 1/2 inch steel plate welded to it and there is no need to cut away any foam, simply cut a slot and insert the bolt in the slot |
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James Eggert
Basic Member
Posts:411
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| 14 Feb 2009 07:42 AM |
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"simply cut a slot and insert the bolt in the slot"???
I don't understand this setup at all, but I will say that any cantilever on a bolt has to be planned for. Using 1/2" ABs do not allow for any such cantilever!
It's easier to remove the foam and use either anchor tunnels or a plywood cover plate on the inside of wall! |
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| Take Care<br>Jim<br><br>Design/Build/Consulting<br>"Not So Big" Design Proponent |
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roch
New Member
Posts:25
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| 14 Feb 2009 06:01 PM |
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the 2 1\2 inch plate welded to the anchor bolt eliminates the need to cut away any foam as the plate will be in contact with the wood ledger and concrete .
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scicf
New Member
Posts:67
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| 15 Feb 2009 12:01 AM |
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I wish I had your building inspector!! |
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roch
New Member
Posts:25
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| 15 Feb 2009 08:45 AM |
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this system was actually engineer approved and used on a commercial building to support a 16 inch ledger with 16 inch I joist on hangers and a 25 foot span. These anchor bolts were stagered every foot ,we installed over 1200 in this building and it took about 24 man hours,imagine how much time it would have taken to cut out foam around 1200 AB's probably double the time and money |
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James Eggert
Basic Member
Posts:411
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| 15 Feb 2009 09:30 AM |
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I think I see, this plate is similar to the ICFConnect insert plates.
Makes sense now.
Hugh
The BI would not have ab issues, once it is shown how the system works. As a licensed BO, I would accept this setup, mostly because of using multiple install techniques in the field in the past. |
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| Take Care<br>Jim<br><br>Design/Build/Consulting<br>"Not So Big" Design Proponent |
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arkie6
Veteran Member
Posts:1453
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scicf
New Member
Posts:67
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| 15 Feb 2009 12:29 PM |
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my official requires the ledger to be in contact with the concrete. The way I understood it, the plate would still be bearing on foam or 2 1/2 concrete. |
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arkie6
Veteran Member
Posts:1453
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| 15 Feb 2009 10:17 PM |
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Posted By hugh jones on 02/15/2009 12:29 PM
[quote]...The way I understood it, the plate would still be bearing on foam or 2 1/2 concrete.[/quote]
No. The plate would not be bearing on foam. The plate that we are talking about above is welded lengthwise to the anchor bolt. The end result would look kind of like a flag (see my poor attempt at drawing it below). The anchor bolt w/plate is then inserted horizontally into the foam after a vertical slot is cut in the foam; then length of the slot being the anchor bolt diameter plus the width of the plate. The plate would be directly below the anchor bolt. Its length would depend on the intended use. In the case of a ledger board attached to an ICF wall with 2.5" thick foam, the plate would be 2.5" or just slightly longer so that it would extend from the face of the concrete to the ledger. Once the ledger is installed it is tight up against the plate so that the load is transferred to the concrete. The anchor bolt is purely in tension at that point.
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scicf
New Member
Posts:67
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| 16 Feb 2009 08:26 AM |
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I see said the blind man! Thanks for the explanation. |
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