Gene’s Roof Prop Hinges, now available in 3 Versions: 1/2in pvc, 3/4in pvc, and 1/2in EMT. Using (2) 1/4in diameter bolts and nuts you can easily reach an appropriate angle for any pitch to make your props plum on your roof.
The lower bolt is the pivot point for the pipe and the upper bolt will lock in the angle. The two pipes rest on the roof and you just lay a small sandbag over them using a few small screws to hold them in the main unit. For stability it is highly recommended to use heavy sandbags or other material to weigh down the props on your roof.
Also, one hinge recommended for 150-pixel props or less. Bigger props can be accommodated by using multiple roof hinges together.