Rigging Part B Flashcards
Crane booms are what type of lever
Lever that increases the mechanical advantage
A rope in a sheave should be supported between what arc
120-150 degrees
The diameter of the sheave should be how many times bigger than the rope
20x
What pulley does not increase mechanical advantage
Single wheel pulley
What is one way of expressing the amount of total energy used to lift a load
Energy used to lift a load is equal to the distance the load travels up off the ground divided by the distance of the rope that is pulled to lift it
Recommended when a tackle system has more than five parts of line
Square reeving
This lever arm is always longer than the resistance arm
Effort arm
How to calculate work
Force applied X distance moved
What happens when two blocks are reeved
They become a machine
These cranes are often designed low to the ground so they may pass under obstacles can also crab walk
Industrial crane
This crane has oversized tires and is designed for rough ground
Rough terrain cranes
