I have a barn that with a central bay that was originally designed for supporting hatywagons, so it's undergirded by three huge tree trunks used as beams (running longitudinally, parallel to wheel tracks). It has previously been rated by an engineer as being capable of supporting 45 psf at its...
I have a very, very similar setup to rlay023's. I use almost exactly the same rim to drive my rope. And I also have experienced the very same problem: to get enough friction to drive the rope, you need to do two wraps; but a skier abruptly weighting the rope will cause slack that propagates and...