are done on a regular basis and all operators have load charts in the cranes to determine the working load of the boom taking into consideration the reach and weight being lifted. They even have scales in the crane that can measure the weight of the load. There is also a computer in the crane that will warn an operator when he exceeds the working limit. We had a boom failure in Raleigh when I worked for a crane and rigging company there and it was determined to be metal fatiuge, something that is unforseen and hard to detect. Edwards has some great operators as I personally know alot of them.