ANSI E1.4 The video is a brief introduction into the fourth of ESTA’s American National Standards. The standard applies to permanently installed, manually operated but counterweighted systems of stage rigging hardware for the raising, lowering, and suspension of scenery, lighting, and similar loads. It doesn't apply to performer flying, or to raising or lowering people. The video outlines what is in the standard, and tells the viewer where to download the standard for free courtesy of ProSight Specialty Insurance.