ESTA E1.21 PDF

This document establishes a minimum level of design and performance parameters for the design, manufacturing, use and maintenance of temporary ground-supported overhead structures used to cover the stage areas and support equipment in the production of outdoor entertainment events.

The structures within the scope of this standard are ones in which the structural elements are rigid towers, trusses, and space frames. Membrane structures and other structures in which the majority of the structural elements under tension are made of flexible elements such as cable are not included in the scope of this standard. This document offers guidance to ensure the strength and structural reliability of these structures and does not address fire safety and safe egress issues.