Slips, Trips and Falls: A Root Cause Analysis Primer A ...
Slips, Trips and Falls: A Root Cause Analysis Primer
Slips, trips and falls happen every day. Falls are responsible for tens of thousands of deaths each year. (Slips and trips are considered a subset of falls, and are included in these numbers.) Falls on the job account for 12-15% of all worker's comp costs. The direct and indirect costs of workers injured and killed on the job are estimated to be billions of dollars each year, both in worker's comp claims and in lost productivity. In 1999, as an example, 5,100 workers were killed by falls and over 570,000 injuries were reported. However, there are many things that can be done to prevent and lessen the impact of falls. Performing a Cause Map - a visual root cause analysis - will allow us to identify all the potential causes of falls. A thorough root cause analysis built as a Cause Map can capture all of the causes in a simple, intuitive format that fits on one page. Once we've done that, we can identify all the solutions.
A worker is injured during a fall because the worker strikes the floor, or another object, and the object contacted is hard, and the worker hits in a way that causes injury. When we say workers are injured because they hit an object in a way that causes injury, what we are really talking about is factors that worsen a fall, and make injury more likely. The worker could land on a part of his or her body that is more easily injured. Another way that injuries can be worsened is if a worker falls farther than his or her height (i.e., not a same-level fall).
The worker strikes the floor or other object because he or she falls, and there is no other support for the body, such as a handrail, or a harness. There are four different ways to fall: slips, trips, the "step and fall" - where a person gets off-balance while stepping - and becoming unbalanced on moving equipment.
Solutions: Use harness or handrail
Monetary Goal Impacted
Safety Goal Impacted
Billions of dollars in worker's comp, lost productivity
5,100 workers k5il,l1e0d0frwoomrkfearllss killed from falls
AND
570,000 idn5ij7sua0rib,e0lsi0n0ign
Worker injured
Worker strikes floor or another
object
AND
Solutions: Use soft floor covering
Surface of floor/object contacted hard
AND
Safety Goal Impacted
Worker hits object in a way
that causes
A worker can become off-balance by encountering an unexpected height difference (known as the "step and fall"). This occurs in one of two ways. Either the front foot lands on a surface lower than expected, or the ankle turns due to one side of the foot ending up higher than the other side, with footwear that inadequately supports the ankle. These are both due to an unexpected height difference.
No other support for
body
AND
Worker falls
Solutions: Tuck in head and land on side
Lands on part of body more easily injured
AND/OR Solutions: Use harness when working at heights
Worker falls farther than worker's height
Cause Map
Detail Level
Houston Office 281-489-2904
Why?
Effect
Cause
NOTE: Read the Cause Map from left to right with the phrase "Was Caused By" in place of each arrow.
A worker slips when there is inadequate traction, either because the force of stepping off is too high, or the coefficient of friction is too low. The force of stepping off can be higher than average if the worker is walking quickly or running, making a sudden change in direction, or if he or she has an awkward gait, from injury or old age, for example. The coefficient of friction is a function of the traction provided by the shoes the worker is wearing and the "slipperiness" of the walking surface. The coefficient of friction is too low if the traction of the worker's shoes is inadequate and if the floor is slippery, because the surface is wet, icy and/or oily and does not have a non-skid coating. Of course, for this to be an issue at all, the worker has to step into the slippery area.
Awkward gait
Worker slips
Traction inadequate
AND/OR
When a worker trips, it is because his or her toe is stopped, but his or her upper body is not stopped. The upper body does not stop because the worker is moving (and so is the upper body) and it does not stop due to inertia, or Newton's First Law (a body in motion stays in motion). The toe is topped because it encounters an object in the walking path, a rise in the walking path, or a difference in height of subsequent stairs.
Toe stopped
Force of stepping off too
high
AND
Coefficient of friction (COF)
too low
Solutions: Ensure walking path properly maintained
Object in walking path
AND/OR
Rise in walking path
Solutions: Ensure walking path properly maintained
Worker steps on slippery area
AND
Solutions: Wear shoes with good traction
Traction provided by
shoes
AND
Quality of walking surface
slippery
AND/OR
Sudden change in direction
AND/OR Solutions: Walk at a medium, even pace
Walking quickly or running
No non-skid floor coating
AND Solutions: Ensure walking path properly maintained
Surface icy
AND/OR
Solutions: Ensure even walking surface
AND/OR Surface wet
Worker trips AND/OR
AND
Upper body not stopped
Difference in height of
subsequent
Worker moving
AND Inertia
Solutions: Ensure even walking surface
AND/OR SolutAioNnDs/O: R Ensure walking path properly maintained
Surface oily
Worker offbalance ("step
and fall")
Front foot lands on surface lower than
AND/OR
One side of foot ends up higher than
Unexpected height
difference
Ankle turns
AND
Solutions: Wear footwear with ankle support
Footwear inadequately supports ankle
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