Rigging and Hoisting Operations Flashcards
6 cards from real NWSA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Rigging and Hoisting Operations flashcards as text
What is the purpose of a gin pole in tower rigging operations?
Answer: To provide a temporary lifting point above the work area for hoisting materials and equipment up the tower
A gin pole is a temporary lifting device mounted on the tower that provides a high anchor point for hoisting operations.
What safety precaution must be taken when using a capstan hoist for tower work?
Answer: The operator must maintain proper wraps on the drum, never allow the rope to override, and keep hands clear of the pinch point
Capstan hoists rely on friction between the rope and rotating drum. Improper wraps or contact with the pinch point can cause serious injuries.
How does wind affect rigging operations on towers?
Answer: Wind creates lateral forces on loads, increases dynamic loading, and can cause loads to swing into the tower structure or workers
Wind creates unpredictable lateral forces on suspended loads, especially large antenna panels that act as sails.
What is the correct method for inspecting wire rope used in tower hoisting?
Answer: Hands-on inspection checking for broken wires, corrosion, kinking, birdcaging, diameter reduction, and core protrusion
Wire rope deteriorates from use, environmental exposure, and internal fatigue. Thorough hands-on inspection detects conditions that would cause failure.
What is meant by the term 'sling angle factor' and why is it critical in tower rigging?
Answer: It describes how the angle of sling legs from vertical increases the tension in each leg, reducing effective capacity
As sling legs angle further from vertical, the tension in each leg increases due to geometric forces.
What documentation must be maintained for rigging equipment used on tower sites?
Answer: Inspection records, load test certificates, manufacturer rated capacities, and removal-from-service documentation
Complete documentation creates an auditable history of rigging equipment condition and ensures only rated equipment is used.