Hi Larry.

I'm not experienced with ICF myself, but am planning an ICF home. I posted a question here and was directed by *focusonz to this great "little" document. http://www2.huduser.org/portal/publications/destech/icf_2ed.html . From what I've read, it seems that it may have information to help answer your question.

JPWhite

Linked properly.

http://www2.huduser.org/por...f_2ed.html

Hi
I build many ICF basements with hights even up to 15"
The main issue is to determine the amount of backpresure you will have. that will determine the tipe of reinforcment you will need

I'm not going to try to address your technical issues here, however, Just as a matter of interest: You can order the TF vertical ICF foam planks, and their continuous "studs" (ties) at exact heights. (11' 6") This is a benefit over a block system since you don't have to cut down the top course of blocks to achieve your desired plate height. If you're interested, you can check out the TF website for more info, or call them direct. Good luck with your project.

Hi Larry:

I know it must seem like all of us are skirting around your REAL question which is - that ANY available prescriptive structural design data from the IRC 2003, IRC 2006, and the HUD/PATH download document noted above all top out at 10'-0" and what you are looking for is the suggested reinforcement for a wall height of 11--6" in conjunction with a frame 1/2 story roof area. The fact remains that above 10 ft in height is NOT covered on any available known prescriptive data in the USA and will require verification as such by a Professional Engineer licensed for your state. To get an idea of what is close to what you may require, you might consider checking the vertical reinforcement for a 10 foot wall supporting a 10 foot ICF 2nd story and roof. NOTE that this CANNOT be relied on as gospel truth and MUST be confiirmed by an engineer to be valid - but at least it will get you close to knowing what likely will be required for reinforcement for your wall scenario.

Have a look at their engeneering manual as below it should answer your question.

http://www.integraspec.com/pdf/engineeringmanual.pdf

Larry.... Don't be shy to employ the services of an Engineer. It will be money well spent since you will know that you are not over building, or worse under building..... An engineer will have a "due diligence to look at your whole plan and see if there is anything "kinky that we might miss ( eg.... stairwell against a wall that has a very high backfill on it. In the end a good engineer is going to save you $$ on your project... and provide some peace of mind.