main floor elevation (height) change

[zook250]

hi all,

i have fianally finished the basic dsign of my home, much thanks to david for the help. the next problem i have encountered is the main floor height. my main floor is to be 36" above grade. the garage will be set at grade, so the elevation change between the garage slab and main floor will also be 36". can i change the absolute 0 as my main floor height somehow? i have tried everything , but it i ether screws up my roof or make the foundation too deep etc. i know there is probably a very easy way to do this but it is elluding me. also i was not able to locate this in the documents or user knowledge base.

thanks
curt