Land & New Construction6yFollowAddition 24’x23’ concrete foundation 12” from foundation to existRobert CordesMember since 2019 · 1 post · 0 votes24’x23’ addition 12” from foundation wall to existing floor height. 14” AGI stock to span the 24’ gap. In doing this there ends up being a step up into the addition which the customer does not want. I suggested installing lally columns and smaller floor joyces. 0Reply4 views