CTSP Struck-By and Falling Object Hazards Flashcards

What is the function of the 'back cut' in a standard tree felling operation?

Answer: To complete the felling by cutting from the back of the tree to release it from the hinge

The back cut releases the tree from the stump and allows it to fall in the direction controlled by the notch and hinge.

What must workers do if a felled tree becomes 'hung up' in another tree?

Answer: Use a rope or mechanical pulling device from a safe direction; never work beneath it

A hung-up tree must be freed with a rope or mechanical device from a safe direction—ANSI Z133 specifically prohibits working beneath or cutting the trunk of a hung tree.

Why is high-visibility (hi-vis) clothing required for ground crew during tree care operations?

Answer: It ensures ground crew are visible to the climber, equipment operators, and passing vehicle traffic

Hi-vis clothing makes ground crew members visible to climbers overhead, equipment operators, and vehicle traffic, which is critical to preventing struck-by incidents.

When must a tree risk assessment be performed before tree care work begins?

Answer: Before any climbing, rigging, or felling operation begins on a tree

A tree risk assessment must be performed before any climbing, rigging, or felling begins to identify hazards and determine how to mitigate them.

What is a 'throwline' used for in tree climbing and rigging setup?

Answer: Installing a climbing line by throwing a weighted bag over a target branch, then pulling the line into position

A throwline is used to install a climbing line by launching a weighted throw bag over a target branch and then pulling the heavier climbing line up into position.

What is the greatest struck-by hazard during wood chipping operations?

Answer: High-velocity debris ejected from the chipper's discharge chute

Material ejected from the discharge chute at extremely high velocity is the primary struck-by hazard during chipping, capable of causing fatal injuries.