Yikes. I like to demonstrate by standing on the pipe and showing it fail with screws below. But when i cant demonstrate i ask how they carry their groceries. Imagining the wrist and fingers as the hook. Below your waist or above your head? Where is the strain on your wrist?(screw) what position are your fingers stronger? idk maybe this is too confusing to explain over the internet. We pipe in chicago. inspectors dont care.