ESTA E1.4 PDF

General

(a) This standard applies to arrangements of rigging hardware for the raising, lowering, and suspension of scenery, properties, lighting, and similar loads. The single purchase, double purchase, and rope and sandbag systems illustrated in the Figures section describe three common arrangements used over performance areas.

(b) The use of rope, as well as rope and sandbags, is a variation of manual counterweight rigging. Where equipment for rope or rope and sandbag rigging differs from equipment used in regular counterweight rigging, differences will be noted.

(c) This standard applies to rigging hardware only, and not to the structure from which it is supported. While not part of this standard, the ability of the building structure to support the intended loads shall be considered in the design and application of rigging systems.