In rigging, safety is paramount. To be safe, it is imperative that you know how heavy the load is and where you are hanging it. If you know how much the load weighs and what your rigging points are rated for, you have the information you need to calculate if your design can be hung safely. In this session, we will go over the process of calculating loads for arena and outdoor ground support situations, learn how to determine bridle lengths and calculate the forces that hardware and structures experience. We will also discuss the very important concept of indeterminate structure and how it should affect our thinking when designing the rigging for a show.