I am going to be building a false wall, and this is perfect for what I am envisioning.
However, mine will be slightly different in I will be mounting a TV, not a screen. Then, I will be mounting a mechanical screen at the top to come down over the TV.
So, the top beam will house the screen. My previous one weighed about 55 lbs for reference, and I'm thinking I want to plan for 75 lbs in weight.
My current TV weighs around 90 lbs.
I'm thinking I need to do more of a traditional frame. Basically, one large rectangle with 4 middle beams which would mount the TV, and the Screen housing.
I've attached two pictures for reference of what I'm envisioning. Let me know if you think it will be strong enough / makes sense.