I am going to pour concrete floor on top of ICF wall. my last row of ICF wall block is cut almost in 2 in order that the external side of the block will act as a stopper for concrete floor above.
how can i brace the last block so when i pour the floor above it will not bend outside?
i saw somewhere a plastic rod with a metal "Grabber" the metal part needs to be inserted to the ICF floor blocks while the plastic part is inserted through a whole that is being drilled into 2 x6" wood all around the wall (or floor) perimeter.
is somebody knows where to buy these "Grabbers"????

Usually we try and embed the last panel on the outside some what in the concrete to help for rigidity.
String line will be a must and a guy on site while the pour is underway. Tweeking is always required, concrete pushes a lot. 2x on the outside block with diagonals to hold a straight line.
Depending on thikness of the floor more or less diagonals shall be required.

Not sure what your reffering to as "grabbers". What will be it's purpose?

We had trouble with this on our first floor pour as well. We attached two wood 2x4's like a T and braced horizontally along the outside between the vertical braces. Worked ok, but should have done the inside as well. You might want to consider doubling up your outside bracing or adding extra verticals if you can't find a way to tie it to the inside.

When pouring the ICF wall, embed 2' steel studs in the top while hte concrete is still wet, flush with the inside of the foam, down about 2" from where the top of the concrete floor pour will be. Place these at 2' on center. Then screw the ICF block into the steel studs with windolocks from the outside. A 2x waler is still necessary, but movement is extremely minimal.
Jake Vierzen
R-Value Concrete Structures
www.rvaluehomes.com