I have a inverted "U" shaped frame which is made up of 10"X12.7mm wall thick pipe with a height of 2000 mm and 3000 mm distance between two legs. Both ends are hinged. 3000 kg point load is on the top of the frame. Now, I wish to move the frame from 50 degree to 140 degree. How to calculate the proper pushing point in the both legs and how much force need to move this frame?