From Rigging Lab Academy Course Mechanical Advantage Theory There are three categories of mechanical advantages using pulleys: Simple, Compound, and Complex. Simple MA: A Simple MA consists of a pulley system that has a single haul connection between the load and the haul team. Compound MA: A Compound MA is a simple mechanical advantage system pulling on the haul line … Continue reading 5 Rules to Help Determine Simple & Compound Mechanical Advantage Systems