INTRO Chap 6 Flashcards
Planned movement of material and equipment from one location to another.
Rigging
Rigging involves uses of what? 3 things
Slings
Hoists
Other types of equipment.
Some rigging operations use a —— to move materials around a job site.
loader
Other operations require ——to lift such loads.
cranes.
What are the two basic types of cranes?
Overhead
Mobile
Maximum load weight that the sling was designated to carry.
Rated Capacity
One thing the ringer must look for during synthetic sling rejection is what?
Damage from overload in a web or round sling.
Damage from over load is aka called what 2 things?
Tensile Damage
Overstretching
Tensile damage is evident when the weave pattern of the fabric begins to pull apart.
T
Twin-Path slings have what?
tattle tails
When the tail has been pulled into the jacket, what does it indicate?
The sling may have been overloaded.
Most alloy steel chain slings can be used in temperatures up to —— with little loss in rated capacity.
500 “F
Like other slings, wire rope slings must be what?
Inspected before each use.
Who can actually make the decision to use a wire rope in a rigging operation or to discard it if it is damaged.
Qualified person
Another classification of vertical hitch is the what?
Bridle Hitch
Consists of 2 or more vertical hitches attached to the same stuff.
Bridle Hitch
Bridle has more vertical hitches attached to the same what 3 things?
Same Hook
Master Link
Bull Ring
The ——–affects the capacity of the sling, reducing it by a minimum of —- percent.
Choker Hitch
25
The Choker Hitch’s reduction doesnt need to be considered when choosing the proper sling.
F
When an item more than —– feet long is being rigged, the general rule is to use —– choker hitches spaced far enough apart to provide the stability needed to transport the load.
12 ft
2 choker hitches
Shackles used for overhead lifting should be made from ——, not cast steel.
forged steel
This thing has become the most widely used type in general industry.
The screw pin shackle
Specially designed for angular pulls.
Swivel eye bolts
Eyebolts must be ——- ———– before each use.
Visually inspected
Who must visually inspect eyebolts and how many times?
Qualified rigging inspector
once a year
The most comming type of end fitting hook.
Eye hook
Eye hooks may or may not have ——- or ——
Safety Latches
Gates
Rejection criteria for rigging hooks. 7 things
Wear / Scraping Cracks Cuts/ Gouges Corrosion/ Excessive Rust Increas in Throat Opening Twist Elongation
Below —- degrees, sling stress increases dramatically.
45
The greater the sling stress, the less effect on the lift’s safety.
F
Provides a mechanical advantage for lifting a load, allowing you to move objects that you can’t lift manually.
A hoist
all hoists use a ——- —— to transmit power and lift a load.
Pulley System
Some hoists are mounted on trolley’s and use electricity or compressed air for power.
T
All chain hoists use a —- —- to lift heavy loads.
gear system
To make the safest selection, the rigger must know the —- —- of the load, the ——- at which the slings will attach to the load and the ——- — —— applied during the lift. Only then can a sling be rigged safely to a load.
Total Weight
Angle
Total Sling Stress
Using hand signals to communicate load navigation directions is an intergral element in the safe transport and control of all loads.
T
Used for communicating load navigation directions from the signal person to the crabe operator.
Established Hand Signals
the hand signals used in rigging operations have been developed and standarized by…
American Society of Mechanical Engineers.
Been developed and standarized for use with mobile cranes and for use with overhead cranes.
ASME hand signals
Dont worry about keeping the landing zone clear of personnel other than the tag line tender.
F
