How do you make a rope ladder without using wood, simple loops or knots?
I don’t know why you’d want to make a rope ladder but wouldn’t want to use wood or any sort of knot, but here’s a guaranteed solution I’ve seen work: 2-ton epoxy. You can get it at any home improvement store. Depending the size of the ladder, you may need two or three tubes. Mix the epoxy according to the directions, dip the ends of the rung pieces in it, and affix them to the sides. Take care to do it right the first time because you aren’t going to be able to make changes. Once you’ve got the rungs in place smear epoxy all around all the joints, being sure to coat the rope all the way around. The epoxy will basically make the rope into a solid, inflexible mass. I’ve used this trick to turn basic string into strong sticks for architecture projects, and on a larger scale it suffices to connect rope ends to one another when the ropes aren’t long enough to tie.
You need to splice the rungs into the side rails.Using a suitable length of three strand Monofilament Polypropylene rope for the rungs, unravel about 14″ and mark it there with plastic tape. Melt the ends with a flame so the fibers won’t come undone as you work with them. Do the same on the other end with the width in between the side rails you want. Measure out the rails however long you want them to be by bending the long rope in half cut it and reverse one side so both rail strands lay the same side by side and mark(adjacent to each other) the rails (to locate the rungs) with a piece of tape every foot or however you want the rungs to end up.. You probably should leave some extra length on ends of the rails so you can secure them to whatever your going to when the ladder is finished. At each (one at a time, don’t get ahead of yourself) tape mark untwist the rope so to open it enough ( a phd or wooden dowel might help to keep them open) to pass strands of the rung over and through th