Learn how to build a Z-Rig, a mechanical advantage system designed for efficient pulling and hauling in rescue, off-road recovery, and rigging scenarios. This step-by-step tutorial demonstrates proper ...

When you push or pull with a simple machine, you are applying a force and doing work. And, if you get more force out of a machine than you put into it, then that machine has a mechanical advantage.

In the world of rope rescue, we use mechanical advantage systems really for two reasons. The first being a force increasing tool and the second, a means of reducing the weight of a load during a ...