diy 150" screen will velcro even hold?

[Emperor_Barbarosa]

Trying to rig up a 150" DIY projector screen on a stand, and I'm already running into the classic problem: sag. I want it stretched tight like a proper frame, but most DIY stands I've seen look like wrinkled sails after a week. Velcro straps sound convenient, but on vertical poles they'll just slip down unless you anchor them. Tape isn't going to hold long-term. Zip ties work better for tension, but then you're cutting and redoing them every time. So what's the real trick here? Do people add stoppers/clamps on the poles, or is the only real solution to build a rigid frame where the grommets get pulled evenly all the way around? I'd rather not waste time with half-measures if the end result is always going to sag.

 

[Peignot_08]

I had the same problem when I made a 150" screen last spring for movie nights in my backyard here in LA. The screen kept sagging, so I used metal pipes to build a strong frame. I added bungee cords through the holes in the screen to pull it tight. I made sure the cords were spaced out evenly and the corners were tight. I also used clamps with rubber to keep the pipes from moving. It's stayed strong, even in wind.

 

[LightBeam]

Go with square tubing or EMT pipe and corner pieces. Use bungees and grommets to get the screen tight. Clamps or stoppers can help, but if you don't support the whole screen, it'll still sag in the long run.