What are the most common types of crane accidents quizlet?

OSHA has identified the major causes of crane accidents to be boom or crane contact with energized power lines (nearly 45% of the cases); overturned cranes; dropped loads; boom collapse; crushing by the counter weight; outrigger use; falls; and rigging failures.

What are the most common types of crane accidents?

OSHA’s analysis of crane accidents identified the major causes of crane accidents as:

  • boom or crane contact with energized power lines (nearly 45% of the cases)
  • under the hook lifting device.
  • overturned cranes.
  • dropped loads.
  • boom collapse.
  • crushing by the counter weight.
  • outrigger use, falls and rigging failures.

What are the four major types of crane accidents?

The main four causes of crane accidents are contact with power lines, overturns, falls, and mechanical failure.

Which of the following is the most dangerous factor among crane accidents?

Contact with overhead power lines – Electrocution from contact with overhead power lines is a leading cause of crane related accidents. Both the crane operator and workers in the crane basket should be aware of the placement of power lines surrounding the worksite.

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How common are crane accidents?

According to the Bureau of Labor Statistics’ Census of Fatal Occupational Injuries, 79 fatal occupational injuries were related to cranes, derricks, hoists, and hoisting accessories in 1993. (2) OSHA’s analysis of crane accidents in general industry and construction identified an average of 71 fatalities each year.

What is the world’s largest crane?

The Liebherr LTM 11200-9.1, built by the German company Liebherr Group, is the most powerful mobile crane ever built. It also has the longest telescopic boom in the world, which extends fully to 100 meters. It’s set on a double cab truck and can lift 1200 metric tons – that’s nearly 700 automobiles.

How can we prevent crane accidents?

Make sure the crane is not carrying a load which is more than its capacity. Under US standards for mobile cranes, the load should not be more than 75 percent of the tipping weight. 6. Install fences around the construction site to prevent outsiders from going near the crane.

What must be done before operating a crane?

Make sure the crane is suitable to lift and travel the load. … Visually inspect the crane before use. Make sure all loose materials, parts, blocking and packing have been removed from the load before lifting. Remove any slack from the sling and hoisting ropes before lifting the load.

What causes a crane to collapse?

Improper crane assembly.

A major reason booms collapse is improper assembly of the crane. In addition, if the crane does not have the proper wood or metal blocking supports to stabilize the load the crane is carrying, the load could move and cause the crane to collapse.

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Who can operate a crane?

Operators of most cranes above 2,000 lb. capacity when used in construction will need to be either certified by an accredited crane operator testing organization, such as the National Commission for the Certification of Crane Operators (NCCCO), or qualified through an audited employer program [§ 1926.1427(a)].

Which of these injuries could be caused by a flying object?

Flying objects can cause injuries such as cuts, abrasions, concussions, or blindness. Flying objects are a major concern when workers are working with power tools, pushing/pulling loads, or under scaffolds, or work is being performed overhead.

What affects the amount of weight a crane can lift?

For example, if the boom of the crane is extended to 250 feet and the radius (the distance from the center of the load to the center of the crane) is 180 feet, the max load weight drops considerably. The shorter the lift, the more weight can be handled. Transportation of the cranes also needs to be considered.

What is a load limiting factor?

In aeronautics, limit load (LL) is the maximum load factor authorized during flight, Mathematically, limit load is LL = LLF x W, where LL = limit load, LLF = limit load factor, and W = weight of the aircraft. … The limit load factor is reduced if gross weight is increased.

How often do crane operators die?

From 2011 to 2017, the Census of Fatal Occupational Injuries (CFOI) reported 297 total crane-related deaths, an average of 42 per year over this 7-year period.

What percentage of construction fatalities are caused by crane accidents?

Another 30 percent of worker deaths involving cranes occurred to workers in construction and extraction occupations. The worker was operating a crane at the time of the fatal injury in 22 percent of cases. The worker was engaged in construction, assembling, and dismantling activities in another 22 percent of cases.

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Which one of the following is not considered to be a crane related hazard?

OSHA’s analysis of crane accidents in general industry and construction identified an average of _____ fatalities per year. 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.

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