I am remodeling my kitchen and have removed two interior non load bearing walls and part of the ceiling. When we removed part of the ceiling there are 2 x 8 ceiling joists running perpendicular to the scissor trusses above. We cut those in half because we are going to create a soffit affect in part of the kitchen and vault the remaining part. What I need to know is can we attach additional framework to the scissor trusses above to support the 2x 8's to create the soffit? or do i have to finish removing the 2x 8 joists completely and replace it with 2x4. The ceiling joists are not structural, they were put in to support the ceiling only