Which term describes the line used to move the load by applying force to the purchase in a rigging system?

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Prepare for the USITT Backstage Terminology Safety Test. Study with flashcards and multiple-choice questions. Each question includes hints and explanations. Get ready for your exam today!

Multiple Choice

Which term describes the line used to move the load by applying force to the purchase in a rigging system?

Explanation:
In a rigging system, the line that actually moves the load by acting on the bottom block (the purchase) is called the purchase line. This line carries the force that lifts or shifts the load through the tackle, with the opposite line (often called the haul line) being the one you pull to initiate the movement. The other terms refer to different parts of the setup: the arbor is the counterweight carriage, and the head block is the top pulley assembly, while the main line is not the specific line used to move the load through the purchase in this context.

In a rigging system, the line that actually moves the load by acting on the bottom block (the purchase) is called the purchase line. This line carries the force that lifts or shifts the load through the tackle, with the opposite line (often called the haul line) being the one you pull to initiate the movement. The other terms refer to different parts of the setup: the arbor is the counterweight carriage, and the head block is the top pulley assembly, while the main line is not the specific line used to move the load through the purchase in this context.

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