Dangerous Conditions for hoisting and employee: Do not hoist employees if weather conditions are bad, or if any other indication of impending danger exists. If employees are hoisted and a dangerous situation arises, they should be grounded immediately and safely.
Which one of the following hazards is not considered to be a crane related hazard?
Which one of the following is NOT considered to be a crane-related hazard? According to OSHA, hoisting personnel on a platform is NOT considered to be a crane-related hazard.
What is the factor of safety applied to personnel hoisting?
At each jobsite, prior to hoisting employees on the personnel platform, and after any repair or modification, the platform and rigging must be proof tested to 125 percent of the platform’s rated capacity.
What is the safety factor for rigging?
Multiple lift rigging procedure.
This capacity, certified by the manufacturer or a qualified rigger, shall be based on the manufacturer’s specifications with a 5 to 1 safety factor for all components.
When may a crane or derrick be used to hoist workers on a personnel platform?
Use of Personnel Platform
A personnel platform must be used when hoisting employees except when hoisting them: into and out of drill shafts that are 8 feet in diameter or smaller; in pile driving operations; solely for transfer to or from a marine worksite in a marine-hoisted personnel transfer device; or.
What are the four common types of struck by hazards?
There are four common struck-by hazards in construction: struck-by flying objects, struck-by falling objects, struck-by swinging objects and struck-by rolling objects.
What are the major types of caught in and caught between hazards in construction?
“Caught in-between” hazards kill workers in a variety of ways. These include: cave-ins and other hazards of excavation work; body parts pulled into unguarded machinery; standing within the swing radius of cranes and other construction equipment; caught between equipment & fixed objects.
What is a qualified rigger?
A qualified rigger is a rigger who meets the criteria for a qualified person. Employers must determine whether a person is qualified to perform specific rigging tasks. Each qualified rigger may have different credentials or experience.
What is the minimum safety factor when a rope is used for hoisting materials?
Never overload a rope. Apply the design factor of 5 (10 for ropes used to support or hoist personnel).
What is the most common misuse of rigging?
Overloading The Hoist: Not surprisingly, the single most common way to potentially damage or misuse a chainfall is to overload the hoist. Putting too much force on the hook or exceeding the working load limit of the hoist leads to stretched hooks, damaged equipment, damaged loads, and employee downtime.
What is a 5 to 1 safety factor?
These single use/single trip bags are rated at a 5:1 safety factor ratio (SFR) which means that they have the ability to hold five times the amount of their safe work load (SWL). Remember, although the bag is rated to hold five times the rated safe working load, doing so is unsafe and is not recommended.
How is safety factor calculated?
The “safety factor” is the ratio between the force that will be applied to a component in a system and the minimum breaking strength of the component. To calculate the safety factor, divide the gear’s minimum breaking strength by the maximum force it will support.
What are the 3 types of slings?
There are three main types of lifting slings that you can choose: chain slings, wire rope slings, and polyester slings.
Can cranes be used to lift people?
Mobile cranes are generally designed for the use of lifting loads and are not normally designed for the purpose of lifting persons. … However, mobile cranes may be used to hoist persons in suspended platforms for working at height when it is the least hazardous way to complete the job.
Can you hoist people with a crane?
Cranes are not designed to be personnel lifts (indeed, most crane manufacturers specifically state that their machines are for material handling), but it has long been recognized that cranes can be used to lift people.
What may cause the bridge to skew?
Skew occurs in a crane system when the bridge fails to remain strictly perpendicular to the runway. Skew causes uneven and accelerated wear to the wheels and rails. This can result in differing diameters of drive wheels which in turn, can cause the crane to skew even more.