This is a first edition book that has evolved into a series. It has things that are no longer in the other editions. If your are into knowledge about working, playing, and using ropes, pulleys, knots, and general rigging by hand, etc. are likely to find a number of interesting and useful things. I go over ideas, concepts, and details about Mechanical Advantages like wedges, levers, pulleys, and other types of mechanical advantages (MA) for rescue, arborist, I share details about many different resultants. A resultant occurs when we combine various MA. They can multiply the forces many times more than expected. For example.

A 200 lb block of cement falling 6 feet onto a concrete drive way will create well over two tons of force (2,400 Lbs.) I have included some stories about my own near misses, while working with these resultant forces; some of which nearly took my life. I also share other situations, where resultants have hurt and killed others. Interest has been such that I am just finishing Version two with lots more Dangerous MA Resultants, and many (around 400 pages) Rigging tips and ideas almost I have found having this knowledge about these resultants has helped me do everything from change a fuel filter, to get a water heater (full of water) up a narrow stairway and outside, to saving lives. This includes engineering special effects for movies and TV commercials, to bolting boulders weighing many hundreds of tons, to the side of a mountain, so it would not fall on others, to rescuing people from precarious places - "resultants are all around us."Whether you are a Seasoned Professional, interested in expanding your knowledge and skills, or someone interested in learning more about the world around us, you find reading this text is an investment in efficiency, safety, ideas, survival and additional skills, and much more. It can earn you money, make your job easier, or it could save your life, or someone else's life.Thanks again and please do enjoy .

Douglas S. Hansen.