If each "push down" is an area, then it would be best to create a Wrap feature to split the single surface into multiple surfaces with one sketch. If the "push down" can be assumed to be a point load, then you can apply loads at reference points.
Wrap feature: Insert > Features > Wrap and choose "Scribe"as the wrap parameter. Note: Only one surface can be split with a wrap.
For those of you not doing multiple splits with a single sketch, then use a Split Line feature (Insert > Curve > Split Line).