im not saying the human body is bending the wall but my brother could feel it when i slammed my shoulder into it the buildings im trying to compete with are pole barns and steel framed buildings i may not have the strongest icf wall out there but  i think  comparing this building with a pole barn  is like comparing toilet paper to plywood,

I think people are concerned with this because it does seem a bit light compared with what they are accustomed to, particularly if yours is not engineered. For example, it sounds like you have a 5 inch footing on that wall. I have recently seen 10" thick on similar. If you continued with your typical #4 bar @24" OC for your ties, you have less than a quarter of the steel that was engineered for my recent - #5 bar @8" OC.

I think there is a good chance the motion you feel might be related to the footing and base of the wall and not the "strength" of the ICF slab itself.

Any wind loading on those walls?

Peter, the 1" vibrator has an area of influence of about 6". That means you have to overlap your penetrations in the concrete to even hope of proper consolidation. At that pace you would have to drop the vibrator 1680 times on this job if done in three lifts. The 1" vibrator recomendation came out of the original block designs and molding qualities of the block. I started using icf's in 1989 and at that time the only recomendation was to tap the outside of the block with a hammer and 2x4. After one job I started installing with lower lifts and a 1.5" vibrator. I've done jobs with up to 2.5" vibrator heads. On a 8' wall I do three lifts and vibrate each. I even vibrate the top of the wall on the final lift. The area of influence data comes from the Oztec web site and somthing I learned by checking there, the amount of concrete they say can be vibrate in 1 hour with a 1" head is 2 yds. How many pours are done at that rate. Next time you pour a wall, use your 1" then try a 1.75 and watch the concrete drop. Most block on the market can take a bigger head than a pencil.

Vibrators work by allowing air to float up and out of the concrete, so the tip should not be withdrawn faster than the air can move upward, about 3 inches per second.

I wonder how often this rate is used.