Ensure employees know they must not stand under loads and ensure operators never lift a load over an employee. You must never stand under a crane or have a load lifted over you. It’s crucial your employees are aware of this and avoid walking through any zones where cranes are overhead.
What is the safety factor for cranes?
CMAA safety factor for the wire rope is 5:1 for standard cranes, and 8:1 for molted metal cranes.
What helps to improve crane safety?
Ensure items being lifted are properly secured.
When working with a mobile crane, make sure your crew understands exactly how to secure each load. Assign a supervisor or lead hand to double, and even triple-check every single load prior to lifting – a few extra minutes spent checking the load can literally save a life.
What is the OSHA guideline regarding cranes in construction?
OSHA issued a final rule setting November 10, 2018, as the date for employers in the construction industries to comply with a requirement for crane operator certification. Compliance Directive for the Cranes and Derricks in Construction Standard OSHA Directive CPL 02-01-057, (October 17, 2014).
What guidelines should you follow when using a crane with outriggers?
- If a crane has outriggers they should be used on every lift.
- All outriggers on a crane must be used if an outrigger load chart is being used for calculating load capacities.
- Even on ideal, solid ground always use outrigger floats or mats.
- Use of a crane’s outriggers is your choice.
How is Crane SWL calculated?
SWL or WLL are calculated by dividing MBL by a safety factor (SF). An example of this would be a chain that has a MBL of 2000 lbf (8.89 kN) would have a SWL or WLL of 400 lbf (1.78 kN) if a safety factor of 5 (5:1, 5 to 1, or 1/5) is used.
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.
At what depth of a trench does OSHA require fall protection?
OSHA requires that fall protection be provided at elevations (with unprotected edges) of four feet in general industry workplaces, five feet in shipyards, six feet in the construction industry, and eight feet in long shoring operations.
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.
How often does OSHA require cranes to be inspected?
OSHA regulations only require that such equipment be inspected during initial use and annually thereafter by a “competent person”, or by a government or private agency recognized by the U.S. Department of Labor. The owner must, also, maintain a record of these inspections.
What are the most common 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.
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.
What part of the crane is used to lift and lower the load?
Hoist – A mechanical unit that is used for lifting and lowering a load via a hook or lifting attachment.