Drywall Drop Ceiling

Hello,

I have a question on my soffit/drop ceiling. I've attached a picture.
This is for a drywall drop ceiling.

I've already gone under the ductwork, but my ceiling will then be a little higher to the left of the ductwork. I didn't make my ceiling the same height all the way across because it would cover the window. And I couldn't make it tight to the joists because of a gas pipe.

My question is can I tack a long 2x4 "flatways" to my existing ductwork soffit and then put another long 2x4 on the stud wall on the opposite side of the room (running perpendicular to the studs)...then I would either toe nail or connect to the bottom of those 2x4's with my ceiling runners?

I would obviously reinforce my runners with braces coming down from the joists, but my concern was whether this would be too much weight on my soffit ladder already holding runners under the ductwork or too much weight on my framed wall.

You guidance is appreciated!

Thank you!

 

That should be fine.................