Rigging, Crane and Hoist, Climbing, Lifting and Procedures Flashcards
What do you use on a boom truck to increase the cranes stability when you hoist?
Two sets of stabilizers
The tirfor are best used for?
Moving heavy equipment across the floors or horizontally
What are the common capacities for electric hoist?
1/4 to 5 ton
What can you do on the crawler-mounted lattice boom crane to give the crane more stability?
you can extend the tracks laterally to provide a wider stance
One of the most important considerations when assessing the condition of the ground on which a crane will sit is to?
to investigate whether the ground has been excavated recently
What are the two purposes of blocking when used with outrigger floats?
- increases the bearing area of the float
* it prevents float from settling or sinking
What must you ensure when you are leveling a crane on outriggers?
that all tires are off the ground
In addition to using a target level or carpenters level, what other means can be used to determine that the crane is sitting level?
check if the hoist line is hanging plumb in two directions
What three (3) things affect the stability and reduce the lifting capacity of a mobile crane?
- load distance
- load weight
- quadrant that the crane is lifting over
When the crane you are using is equipped with outriggers, what must you ensure?
the outriggers beams are extended fully and that all four tires are off the ground
For transportation purposes, where is the jib extension mounted on the carrier-mounted telescopic boom crane?
crane heel (base) section of the telescopic boom
What are two basic type of cranes?
- hydraulic
* conventional
When estimating the weight of a material, what percentage of the safe load is added?
12 percent
What is the strength reduction on a bent rope?
50 % reduction
What is the strength reduction on a knotted rope?
50 % reduction
What is the strength reduction on a spliced rope?
15% reduction
What is the percentage on rope strength when a hitch is used?
75%
Tuggers are used for?
- hoisting loads
- lowering loads
- pulling loads
The ratio for general rigging is?
5:1 or 5 is to 1
Safety factor for lifting and transporting workers
10:1 or 10 is to 1
Safety factor for public elevators
20:1 or 20 is to 1
When must you replace a rope?
when the surfaces are worn by 1/3 or more of their original diameter
What is the formula to calculate 5 to 1 factor on wire ropes for general rigging and hoisting?
D²x8
The first consideration on lifting a load is?
the weight of the load
The rope perimeter should be supported by the sheave in an arc of?
120 to 150 degree
All turnbuckles used for rigging must be made from?
Alloy steel
A scaffold must be design and constructed to support at least?
4 times the load
The OHS code provides the safety requirement for operating various types of hoisting equipment with a rated capacity of?
2000 kilos or more
As a rule of thumb use a minimum sheave diameter of?
20 times the rope diameter
What should never be used on turnbuckles?
Jam Nuts
What is the minimum distance a ladder must protrude above the intended landing point?
1 metre or 3 ft
What is the crane sweep area?
is the total area that the cranes boom can swing
Why is chain better suited for certain hoisting jobs than wire rope?
Chain is more resistant to abrasion and corrosion
Why is wire rope better for general construction rigging than chain?
- chain fails when one link breaks
* chain gives little to no warning signs when is about to break
What are the types of jacks available?
- Porta power
* Bottle jack
Remove from service any portion of lifting chain that is worn by?
10 % of the original diameter
When should you remove a chain from service?
if the chain is stretched is more than 5%
What is the recommend sling angle when rigging a load?
The sling angle must never be less than 60%
What does the term shock loading mean?
when a load is expose to stress by having the load suddenly started or stop
What is the goal of proper lifting techniques for the human body?
to eliminate loading stress on the soft tissue of your lower back
How is Safe Working Load or SWL define?
Breaking strength divided by the safety factor
What is the highest that a person should lift?
Lift no higher than eye level
When conducting a hazard assessment related to lifting and handling a load, your employer must consider the?
Weight, Size and Shape of the load
At what height must an employer have a guard rail erected for a temporary work area?
3 metres or 10 feet
What is the strength reduction on a hitched rope?
25% reduction
Where is the lifting capacity marked on a chain hoist?
on the hoist
Only one type of natural fibre rope is sturby enough for lifting service?
number one grade Manila
What is SF stands for?
Safety Factor
What are tag lines used for?
to keep the load from turning or to swivel the load to avoid abstractions in the way
When using hand signals, the operator and the signal man must what?
Agree on various hand signals
Ratio for ladders?
4:1 or 4 is to one
Ratio for scaffolds?
3:1 or 3 is to one
Factors that can cause uneven loading on sling legs are?
- varying sling legs length
- lifting logs positions
- sling eye positions in the lifting hook or shackles
- a structure that is warped, twisted, or uneven
The maximum capacity on a light duty house hold ladder is?
Type 3 - 91 kg
Medium duty light commercial ladder has a maximum capacity of?
Type 2 - 102 kg
The maximum capacity heavy duty building maintenance ladder is?
Type 1 - 113 kg
The carrier mounted lattice boom crane is also known as the?
- truck crane
- mobile crane
- conventional crane
What is a conventional crane?
- A conventional crane uses mechanical means to raise and lower the boom
- The lattice boom is made from a structural pipe and steel
What is one of the fibre ropes main use in the industry?
Safety lines / tag lines
The maximum capacity on an extra heavy duty industrial construction ladder is?
Type 1-A - 136 kg
What does EOT means?
Electric Overhead travelling
What are the three methods of EOT crane controls?
- cab operated
- pendant control
- radio control
What happens when a EOT is to be inspected or to have maintenance done?
it must be tagged and locked out
What supports the trolley on an electric overhead travelling crane?
the bridge
Who must be present if you are moving the boom into the limit of approach?
A signaler or a signal man must be present at ALL times
What is the term limit of approach means?
is the danger zone at which no boom, load, crane, or any hoisting equipment cant enter
The minimum limit of approach is?
ten feet and it increases as voltage increases
How should wooden scaffolds be constructed?
on painted dressed plain wood or lumber should be sound, close-grained S4S material, and all components should fitted tight together
At what height should crane hooks be kept when not in use?
Always leave the crane hook above head height when not in use
