Voice and Hand Signals
Whats the signal for Hoist Up? Hoist up slow?
Index finger up
Index finger under palm
Capacity at which hoist is considered Critical
85%
Point of an object around which all of the weight of object is evenly distributed
Center of Gravity
Before operating a boom truck, always __________ the outriggers.
Extend
What is the signal for Boom Down? Boom Down Hold the load?
Thumbs down
Open and close motion
Name of part of a crane which elevates crane off ground and levels the crane
Outriggers
Weight of concrete per Cubic Foot
150lbs per cubic Ft
Which sling angle will create the most stress on the sling?
30 Degrees
What is the signal for Dog everything?
web of thumb to web of thumb
Operators compartment on a crane
Cab
Formula to calculate Cubic Ft
LxWXH
Chain slings can withstand higher __________ than wire rope slings or synthetic slings.
Temperatures
what is the signal for travel?
forward motion of arms in a circle
Name of a weight that balances the load
counterweight
What is the weight of a W10x100 if it is 10 ft Long
1000 lbs
Every crane is required to have:
Capacity chart
what is the signal for "use Auxilary Hook"
hand under elbow
like a body slam motion
Force that creates a bend in the boom caused by angle and weight of load
Deflection
Formula for Circumference of a circle
2(R)(PI)
All the slings and equipment used for hoisting must have a safety factor of:
5 to 1
5:1