So I am willing to learn, and admit dont know it all, thats why Im often here
SO the other day, a friend calls up, hey were behind can you come help get some joists in and a deck on
hes a good friend we help each other when we can, and I owe him for help big time years back
I get my guys going on some walls and I get there and he is using a system I had heard about , but in my small biz, hadnt yet used
The foundation was poured and a plastic pocket, like a beam pocket, was in place for every TJ-I to drop into. The foundation stem walls were 8″ pour, 2inch for the pocket and the mud sill was just 2×4 p.t ( for a 2×6 wall above)
We cut the TJ-Is and put a bugger of glue at the bottom of pocket, droped in the TJ-I and a plastic wedge/keeper that went on both sides at the top and one nail holding it all to the mud-sill
I said “thats it???”
sure, and if the foundation was straight we wouldnt have to cut much of the TJIs either, the wedge holds it still so it wont squeek , the box isolates it from the concrete and you glue and screw the floor down, we just put the nail into the mud sill to hold it still until we deck it, this is our third house with this system , and havent had a problem yet, and he can do a 6″ pour and use the system , but this house was going up 2 floors.
wow, we flew, cut and drop. , decked it and out in a day ( subs are coming in after, hes trying to beat the rains and get a roof on )
I either use rim set or joist hangers or top flange hangers
SOOOOOOOOOOOO
sure I can see what Boise and other TJI web sites say, but want to ask friends instead
any one else using this system, does it really work well, call backs, etc
because if this works as good as it looked, no more top flange hangers for me
Replies
I would do anything before I'd use top hung hangers. Top hung hangers are the worst design ever.
blue
Warning! Be cautious when taking any framing advice from me. Although I have a lifetime of framing experience, all of it is considered bottom of the barrel by Gabe. I am not to be counted amongst the worst of the worst. If you want real framing information...don't listen to me..just ask Gabe!
Hmmmm. Interesting. I just cruised the Joist Pocket Liner website, and clipped a pic. Here it is.
View Image
This shows a pocket with a freshly applied blob of construction adhesive, eagerly awaiting its I-joist.
A few drawbacks come to my mind.
We would be pressing a whole lot of responsibility on our foundation sub, to get these pockets installed in the forms at the layout needed. In fact, we would probably be doing the pocket installation ourselves, but even then, we would count on the 'crete guy to not displace them during the pour.
We'll have about a foot more foundation sticking above grade, and we'll need to address that with a finish that complements whatever siding and trim scheme we'll have above.
We're used to insulating and sealing our band joist at the foundation interface. Whadda we do with this? Foam it?
From where I see distribution existing today, it looks as if the system was developed for the moderate climate of the Pacific NW.
"We'll have about a foot more foundation sticking above grade"
Some architects specify this type of system so that floor level can be closer to finished grade. Since we do all our own concrete, I don't have any problem dealing with joist layout during forming. I'm always somewhat surprised that so many subs are framers only - having someone else do foundation is giving away control of an integral part of accurate framing.
"We're used to insulating and sealing our band joist at the foundation interface. Whadda we do with this? Foam it?"
Before installing joists, apply rigid foam right over the whole thing, right up to underside of subfloor. Then cut out the joist pockets with a knife or drywall saw.
I've had all sorts of cockamamy setups inflicted on me by engineers wanting to achieve this, but these inserts look way simpler and much less labour intensive than formed ledgers, bolted-on ledgers and so on. I'll check this out more thoroughly and see if I can get some to try next time.
WallyLignum est bonum.
The biggest possible downside I see is that I assume the foundation guys would charge a pretty steep price for putting in all those pockets.
And they'd all have to be right, or you could have some pretty serious problems. Like you couldn't shift a joist to miss a plumbing drop.
A: They already have boyfriends.
ptrtty cool !... a big help in handicap access..
problems with insulating the band area, as gene pointed out,
do they have provisions for off center locations ? and stairwells , headers etc. ?
but one or two steps closer to grade.. could be just what the dr. ordered Mike Smith Rhode Island : Design / Build / Repair / Restore
One 'crete guy here, and I am ashamed to admit I used him, is so out of it, layout-wise, that his builder customers do it all for him. Likewise for the anchor bolt placements. This would fall into the same bucket . . . the lead carp shows up late in the afternoon, and pops 'em all in.
I did work with a guy when I was Indiana, he could handle this with ease, but he had excellent people (all family), and did mostly commercial work.
We've an archy here that designs all his houses with full-up foundations, with the floor joists hung with strap connectors to a second inboard mudsill. He maintains that one should not have to trudge upstairs to get in your $2.8 million weekend house. I can definitely see these in play in those homes.
There a lot of good CAD details available at the joist pocket website.
Saw an article here in the Metro D.C. area with a picture of precast basement foundation walls, looked like it had a concrete ledger cast on the wall for the TGI's to sit on....apparantly part of a push by the big national builders here to pre-assemble/modularize as much as possible...anyone seen these?