Do the bars damage pixels when watching a movie on the TV?

Hello There are certain TV channels that almost always have black borders/bars at the top and bottom of their films. I wanted to ask if anyone knows if this is harmful to the TV? You shouldn't always have the same picture on your TV, otherwise pixel damage can occur and the bars will always be…

Fastening of cross and longitudinal beams to pressure-treated wooden beams: screw selection and recommendations?

I've erected four posts made of pressure-treated wooden beams (7 cm x 7 cm). Cross and longitudinal beams will overlap at the top. The question is: To attach the beams to the studs, I'm using partially threaded screws. Will standard 9 cm long screws be sufficient, or does it have to be stainless steel? And…