This article needs additional citations for verification. Fly systems are often used in conjunction with other theatre systems, such as scenery wagons, stage lifts and stage turntables, to physically manipulate the mise en scène. Theatrical rigging is most prevalent in proscenium theatres with stage houses designed hoisting and rigging safety manual pdf to handle the significant dead and live loads associated with fly systems. The line set is the fundamental machine of a typical fly system.
By hanging scenery, lighting, or other equipment to a batten, they in turn may also be flown. A batten is said to be “flying in” when it is being lowered toward the stage, and “flying out” when it is being raised into the fly space. In manual rigging, a line set’s lift lines support weights opposite their connections to the batten in order to balance the weight of the batten and whatever it carries. The lift lines are reeved through a series of pulleys, known as blocks, that are mounted above the stage to fly loft structure. Automated rigging sometimes uses weights to help balance line set loads in a manner similar to manual counterweight rigging.
Otherwise it relies solely on the motor power of an electric hoist to fly a line set. Line sets are typically general purpose in function, meaning they can perform any number of functions which vary depending upon the requirements of a particular theatre production. For example, a general purpose line set can usually be quickly transformed into a drapery or scenery line set, but converting a general purpose line set into an electrical line set is more involved. When a line set has a predetermined, relatively permanent, function it is known as a dedicated line set. There are normally at least three electrical line sets provided above the stage, with one just upstage of the proscenium wall, one mid-stage, and one just downstage of the cyclorama. Permanently wired electrical line sets are known as dedicated electrics, fixed electrics or house electrics. Larger, multi-use theaters that must frequently convert the stage from a drama theatre to a concert hall often make use of the fly system in this way.
Before being flown the cloud is pivoted to a vertical orientation to minimize the space it requires for storage in the fly loft. This is a system where a small chair with fall protection equipment is suspended from a track that runs the length of a batten to which it is mounted. An electrician sits on the chair, and is flown out to the height of the electrics, to focus lighting instruments. Flying rigs usually involve specialized equipment and techniques operated by a relatively experienced crew. Building and fire codes typically require that either a fire curtain or water deluge system be installed to separate an audience from the stage in the event of a fire. Those substitutions permit the flying of greater loads with a high degree of control, but with a loss of flexibility inherent to most hemp systems.
Where a defect affects the safe operation of the crane or hoist, a new type of arbor was introduced by Thern Stage Equipment in 2010. At arbor low trim, they have an ideal shape and rigidity to maintain bearing alignment and withstand external shock. Another hand line — and above the fly gallery. The lineset should be balanced before loading begins – the stage is referred to as a deck in the manner of a ship’s deck. A competent person shall determine the number of U, or other equipment to a batten, steel bands are a relatively new type of line used in steel band hoists.