I am going to need to be experimentally measuring the stresses in a tubular steel frame. The tubular steel has a 0.75" OD and a thickness of 1/16". The frame is for a chair and I need to determine the stresses at various locations and determine whether or not the stress is below the endurance limit of steel. What is the best way to measure these stresses. I assume strain gauges but I have very little experience with them so I am not certain. Any advice would be greatly appreciated.