Hi All, I've been trying to figure out how to get this formula working for a few days now, and I *refuse* to give up. There are three high points, with a line running down from each to a load W. Each of the lines A,B,C are at different angles to each other (x-y plane), and each of the lines depart the load to the high points at different angles (z-plane). The load is static, and there is no stretch or movement in the system. By knowing only the angles of the lines and the weight of the load, how can I calculate the load on each line? I have calculated this for a two rope system and it is simple trig, but for a three rope system I cannot seem to get it happening! I've tried solving using trigonometry, but I keep getting stuck. Today I've been trying to solve simultaneous vectors, but I still can't seem to get it right. If anyone has any clues, or could help I would greatly appreciate it. I can also draw up a picture to show the system, if that helps.