I working on a project to manufacture a door of size (W)1.5m and (H)2.5m that uses 7 butt hinges attached to the frame. The weight of the door is approx 300kg. Currently I have decided to position the hinges equally to each other but my production supervisor is advising against it. He suggest that about 3 hinges be placed closer at the top and the rest to be located equally at towards the bottom. How do I calculate the distance between hinges. Please help!