Historical
ANSI E1.2-2006
Entertainment Technology - Design, Manufacture and Use of Aluminum Trusses and Towers
ANSI E1.2 - 2006, Entertainment Technology - Design, Manufacture and Use of Aluminum Trusses and Towers, describes the design, manufacture and use of aluminum trusses, towers and associated aluminum structural components such as head blocks, sleeve blocks, bases, and corner blocks in the entertainment industry. It does not cover individual, separate rigging hardware such as half-couplers and shackles. The 2006 edition differs from the 2000 version mainly in that the 2006 version offers advice on applying and removing coatings and painted finishes.
Entertainment Services and Technology Association [esta]