Check Ergonomia Em Ingles

7/27/2019 Check Ergonomia Em Ingles

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WAC 296-62-05174 Appendix B: Criteria for analyzing and reducing WMSD hazards foremployers who choose the Specific Performance Approach.

Page B-1

See http://www.lni.wa.gov/wisha/regs/ergo2000/default.htm

For each "caution zone job" find any physical risk factors that apply. Reading across the page,

determine if all of the conditions are present in the job. If they are, a WMSD hazard exists and must bereduced (see WAC 296-62-05130(4), specific performance approach).

Awkward Postures

Body Part Physical Risk Factor Duration Visual Aid

Holding the hand(s) above the heador the elbow(s) above the shoulder(s)

More than 4 hourstotal per workday

Check ()here if this isa WMSDhazard

Shoulders

Repetitively raising the hand(s) abovethe head or the elbow(s) above theshoulder(s) more than once per

minute


Neck

Bending the neck,without added support,45 or more


Bending the back forward to work,without added support, more than 30


Back

Bending the back forward to work,without added support, more than 45



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Page B-2

Awkward Postures (continued)


Check ()here if this is

a WMSDhazard

Squatting More than 4 hourstotal per workday

Kneeling on hard surfacesMore than 2 hourstotal per workday

Knees

Kneel on soft or padded surfacesMore than 4 hourstotal per workday


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Page B-3

High Hand Force

Body Part Physical Risk Factor Combined with Duration Visual Aid

Highly repetitivemotions

More than 3hours total perworkday


a WMSDhazard

Wrists bent 30or more


Arms,wrists,hands

Pinching an object(s)weighing more than 2lbs. per hand

No other riskfactors


Highly repetitivemotions

More than 3hours total per

workday

Wrists bent 30or more


Arms,wrists,hands

Gripping an object(s)weighing more than 6lbs. per hand

No other riskfactors



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Page B-4

Highly Repetitive Motions

Body Part Physical Risk Factor Combined with Duration

Using the samemotion with little or novariation every fewseconds (excludingkeying activities)

No other risk factorsMore than 6 hours totalper workday


a WMSD

hazard

Using the samemotion with little or novariation every fewseconds (excludingkeying activities)

Wrists bent 30 or more

AND

High, forceful exertionswith the hand(s)

More than 2 hours totalper workday

Awkward postures More than 4 hours totalper workday

Neck,shoulders,elbows,wrists,hands

Intensive keying (for

example, data entry)

No other risk factorsMore than 7 hours totalper workday

Repeated Impact


Hands

Using the hand as a hammer morethan once per minute



a WMSDhazard

KneesUsing the knee as ahammer more than once

per minute



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-

Heavy, Frequent or Awkward Lifting

This analysis only pertains if you have caution zone jobs where employees lift 10 lbs. or more (see WAC 296-62-05105, Heavy, Frequent, or Awkward lifting) and you have chosen the specific performance approach.

Find the Percentage Modifier. Find out howmany times the employee lifts per minute and the

total number of hours per workday spent lifting.Use this information to look up the PercentageModifier in the table below.

For how many hours per workday?How many liftsper minute?

1 hr or less 1 hr to 2 hrs 2 hrs or more

1 lift every 5 mins 100% 95% 85%

1 lift every min 95% 90% 75%

2-3 lifts every min 90% 85% 65%




10+ lifts every min 30% 20% 0%

Note: For lifting done less than once every five minutes, use 100%

Percentage Modifier: _________%

Find out the actual weight of

objects that the employee lifts.Actual Weight = ________ lbs.

Determine the Unadjusted

Weight Limit. Where are theemployee's hands at the beginning ofthe lift? Mark that spot on the diagrambelow. The number in that box is theUnadjusted Weight Limit in pounds.

Near Mid- Extended

Range

Unadjusted Weight Limit: _______ lbs.

Calculate the Weight Limit. Start by copying theUnadjusted Weight Limit from Step 2.

Unadjusted Weight Limit: ______ lb

If the employee twists more than 45 degreeswhile lifting, subtract 10 pounds from the

Unadjusted Weight Limit. Otherwise subtract 0.

Twisting Adjustment: ______ lb

Adjusted Weight Limit: = ______ lb

Multiply the Adjusted Weight Limit by the

Percentage Modifier from Step 3 to get the

Weight Limit. X

Percentage Modifier: _______

Weight Limit: = _____ lb

Is this a hazard? Compare the Weight Limitcalculated in Step 4 with the Actual Weight lifted froStep 1. If the Actual Weight lifted is greater than thWeight Limit calculated, then the lifting is a WMSDhazard and must be controlled.

Step 1

Step 2

Step 3

Step 4

Step 5

Note: If the job involves lifts of objects with a number of different weights and/or from a number of different locations, use Steps 1 through above to:1. Analyze the two worst case lifts -- the heaviest object lifted and the lift done in the most awkward posture.2. Analyze the most commonly performed lift. In Step 3, use the frequency and duration for all of the lifting done in a typical workday.


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Page B-6

Vibration

Use the instructions below to determine if a vibration hazard exists.

Step 1. Find the vibration value for the tool. (Get it from the manufacturer, look it up at this website:http://umetech.niwl.se/vibration/HAVHome.html, or you may measure the vibration yourself). Thevibration value will be in units of meters per second squared (m/s2). On the graph below find the point onthe left side that is equal to the vibration value.

Note: You can also link to this website through the L&I WISHA Services Ergonomics website:

http://www.lni.wa.gov/wisha/ergo

Step 2. Find out how many total hours per workday the employee is using the tool and find that point on thebottom of the graph.

Step 3. Trace a line in from each of these two points until they cross.

Step 4. If that point lies in the cross-hatched "Hazard" area above the upper curve, then the vibration hazard mustbe controlled. If the point lies between the two curves in the "Caution" area, then the job remains as a"Caution Zone Job." If it falls in the "OK" area below the bottom curve, then no further steps are required.

0

10

20

30

40

50

0 1 2 3 4 5 6 7 8

Time (in hours)

Vibration

value(inm/s2)

Caution

OK

Hazard

Example:An impact wrenchwith a vibrationvalue of 12 m/s

2is

used for2_ hours

total per day. Theexposure level is inthe Hazard area.The vibration mustbe controlled.

Note: The caution limit curve (bottom) is based on an 8-hour energy-equivalent frequency-weighted acceleration value of 2.5 m/s2. The hazard limit curve (top) is based on an 8-hourenergy-equivalent frequency- weighted acceleration value of 5 m/s2.

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