Stagehand Primer Description of the activities of unionized theater stagehands. Includes a listing of the technical crew hierarchy, safety information, explanation of different types of theater spaces (such as proscenium and trust stages), and discussions of types of stagehand activities in stage carpentry, scene shop, electrics, sound, video properties, and wardrobe. From IATSE Local 470, the local section of the International Alliance of Theatrical Stage Employees (IATSE) labor union in Wisconsin.