They are structural, however, the structure can be modified to eliminate these members by increasing the size of in-floor beams over this area in order to open up the space more fully. The columns, as designed, do have the effect of defining the kitchen in an otherwise fully open space.

Perfect! We are actually looking for a more open space so thank you for the information. We took the plunge and ordered the study plans on Friday. Can't wait to start going though them!