# Create 3D Members from Soil Zones
Raft models are typically set up to include soil zones and soil profiles. The alternative way to analyse the raft-soil interaction is to create a finite element model of the soil using 3D elements. This tool loops though the soil zones and soil profiles creating a 3D member for each stratum in the soil profile bounded by the soil zones. An isotropic elastic material is created for each member with an elastic modulus corresponding to the value at the mid-height of the stratum.