I am going with a 6" Logix ICF wall for my basement and main floor. I need to hang 12" trusses to support the main floor. Here are the choices I am aware of:

3" steel angle iron. This option was suggested by the engineer of my plans. I haven't priced it yet, but I figured it would be the most expensive option for all of that steel.

Simpson joist hangar. This is the option my ICF contractor suggested. By looking at the specs from simpson, it seems like I would have to have two ledge boards and then a truss hangar. It seems like a lot of work, and a lot of pressure treated lumber for ledge boards.

McMillian Joist Hangar. To me, this looks like the least amount of work except you need to know the truss locations prior to the pour.

Transition ledges didn't seem like a good option because I am maintaining the 6" Logix ICF size from the footings to the roof.

What would you use, and why? I apprecate the feedback.

Brian

It appears that by 12" trusses you mean I-joists?

Use the Simpson hangars and the ledger board, you do not need to use pt but you will need to use LVLs for decent strength!

There is another ICF hangar which doesn't need a ledger, however, you're back to understanding joist placement and then using an Impact driver to install the joists.

For simplicity's sake, use the Simpson...fast and allows for corrections when something is off!!

All the mentioned ways are acceptable. 
You can fasten a ledger board with j bolts.  I am sure the detail should be in the Logix installation manual.  Some of the ways described take more time, others take more money. 

if the simpsons are the simplest, I think that's what I am looking for. My basement will use trusses, not TJI's, to keep the HVAC above the basement drywalled ceiling.

OK, I know the ones, Open Web 2000? I used them last year and liked them, for the first use! Because of their typical 2x4 web, some are 2 x 3, just make sure to order the size in advance for your system! I forgot the OW2000 was avail as small as 12", which was the ones I used!

Back to your original question! Your floor trusses need to be ordered end bearing and notched (factory) to fit either 2-2x6 or 2-2 x 8. You will install the ICFVL along with ICFVL-W for the first rim joist. You will then place a second rim over the first
and mark ICFVL-W bolt heads by smacking second rim at those locations to mark inside face indentations. Then drill those areas about a 1/4 deep with a paddle bit to ensure a fudge factor. Glue and nail rim joist to first rim, and add an occasional lag bolt. Sounds like allot of work but it is not.

Dave

I also think that the ledger can be engineered lumber in conjunction with floor trusses that will use approved Simpson or USP hangers. This would change the need for a second rim joist. GR

I second this, especially since you are using trusses. One big advantage of using I-joists or trusses is dimensional stability compared to sawn lumber. If you use 2x for the rim board you risk compromising this advantage, maybe not much, but nevertheless at least some. Use LVL for the rim board and you can be assured the top of the trusses will stay in the same plane. A big consideration if you are going to use ceramic tile or hardwood for flooring. No big deal for carpet, except maybe the increased possibility of the subfloor coming loose from the joists and causing squeaks.

If you don't think dimensional stability is much of a problem with 2x sawn, go over to JLC Online forums, or John Bridge forum, and see some of the discussion there. Guys write about 1/4" differences from one end to the other in a single board and from board to board.

Reviving an old thread here.

I am interested in the McMillan Joist Hangers mentioned in the first part of this thread and also shown in the 2008 Logix ICF manual. The Logix manual lists the manufacturer of these hangers as New Tech Concrete Solutions with their phone number as 1-888-835-6655.

The above phone number no longer works and I can't find any info on the net for McMillan joist hangers or New Tech Concrete Solutions. Are these hangers still available? If so, does anyone have the current contact information for the company?

Thanks in advance for any info you can provide.

Alan

well the house is done. I did use Logix, but I decided to use the 4" ICF walls on the 2nd floor and do the ledge. I'm glad I did, it was very easy and the floor is super soild. I am also getting the same insulation thickness on both floors.

 

I used Openjoist from my lumber company which are trimmable (Universal Forest ProductS), it was as cheap as the TJIs.