Hi there I have a practical physics question. I'm an industrial abseiler, and on the course today we had this question which not even the instructor can answer. If we have a rope connected to a horizontal beam. Say the rope can hold 100kg before it breaks. Now, if we take the top end of that rope and trace it over the beam and back down to the mass so now we have it doubled over, apparently we can now hold 200kg mass before it breaks. This makes sense if each strand of the rope was independent, but they aren't because its actually one rope doubled over the beam. So I'm thinking, wouldn't there be over 100kg acting on that point in opposing directions? I have attached a diagram. Thanks. David.