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Let's take a look at obligations to implement safety and health measures for office workers

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as stipulated in the rules on occupational safety and health standards

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According to the specifications on the operation and maintenance of air purification systems

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 the employer shall properly operate air purification systems to prevent contamination of the office

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when the employees work in an office equipped with centrally managed air purification

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and shall not allow air entering the office by air purification systems to directly contact the worker

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and the airflow speed must be less than 0.5 meters per second

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In addition, appropriate measures should be taken, such as cleaning, renovating, and repairing air purification systems

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in a timely manner

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Regarding office air evaluation / prevention of inflow of outdoor pollutants


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the employer shall take necessary measures

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such as measuring and evaluating the air in the applicable office

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and installing air purification systems

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or repairing according to evaluation results

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The employer shall take appropriate measures, such as relocating air inlets  such as vents, windows, and entrance doors

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when there is a risk of automobile smoke or other pollutants entering the room from the outside

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For microbial pollution management, the employer shall periodically inspect and repair places that 

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promote the growth of microorganisms from leaks and more to prevent office air pollution caused by microorganisms

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and immediately dry, remove or clean places where microorganisms have grown

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and remove microorganism contamination on the surface of the building and air purification systems

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In the case of air pollution management during the renovation and repair of a building

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where deterioration of air quality is expected, the employer shall

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inform workers of the renovation and repairs, and isolate construction sites 

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or apply appropriate measures such as pollutant control and cleaning


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When looking at managing the cleanliness of the office

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the employer should keep and manage the office clean at all times

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and clean it by using a method that can suppress dust generation as much as possible

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In addition, employers should take appropriate disinfection measures in areas that are likely to cause pollution and pests caused by microorganisms

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such as bath facilities and toilets

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In terms of providing protective equipment, when the worker is required to

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clean, renovate, or repair air purification systems

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employers must provide appropriate protective equipment and ensure they are used

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When providing protective equipment, they must be provided for exclusive use by the individual

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The worker, in turn, must wear the provided protective equipment according to the employer's instructions

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It also stipulates what is considered well-known and established harms

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When workers clean, renovate, or repair air purification systems

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employers must inform workers

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types and hazards of office pollutants

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methods to curb the generation of office pollutants

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protective equipment to be worn and emergency measures

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Among work environment management measures, we will now look at indoor air quality management

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Air volume refers to volume of air taken from the floor of an office by subtracting the volume occupied by systems and equipment

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in the office from the total volume excluding space more than four meters

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Air volume must be at least 10 cubic meters for one worker

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in the office where the worker works full-time

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Ventilation should be provided through a window that can be opened directly to the outside air

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and the area should be at least one-twentieth of the floor area

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However, it is fine if the area is equipped with sufficient ventilation

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Airflow shall be measured so that air entering the office

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by the air purification systems does not directly contact workers

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and the airflow speed must be less than 0.5 m per second

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Air purification system inspections must be conducted prior to use when

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systems are used for the first time or when they are disassembled to modify or repair

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The systems must be inspected every six months for abnormalities

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and documents recording the results must be kept for one year

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Air purifications systems refer to supply and exhaust systems that

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allow office pollutants to be discharged or fresh air to flow into the room

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or filters that remove or reduce pollutants, or cooling and heating systems

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that can adjust temperature, humidity, airflow, and other related equipment

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According to the management standards for each office pollutant

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 if air purification systems are installed in centralized heating and cooling systems

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target materials must be managed to meet the following criteria

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Total amount of respiratory dust suspended in the air

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must not be more than 0.15 mg per cubic meter

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The concentration of carbon monoxide in the room should be less than 10 ppm

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However, in cases where it is difficult to supply air with carbon monoxide concentration less than 10 ppm

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due to contamination of the outside air, it should be less than 20 ppm

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The concentration of carbon dioxide in the indoor air must be less than 1,000 ppm


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Indoor workshops using combustion devices that generate nitrogen dioxide

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must be equipped with exhaust vents, ventilation fans, and other appropriate facilities for air circulation

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to ensure that the indoor concentration of nitrogen dioxide is less than 0.15 ppm

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and employers must check the device for abnormalities every day when using the combustion device

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The concentration of formaldehyde in the office must be less than 0.1 ppm

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In the case of office work environment management, measures must be taken to maintain appropriate temperature and humidity

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If the indoor temperature is below 10 degrees Celsius

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measures to reach appropriate temperature, such as heating, should be taken

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When using indoor air conditioning, the difference between the room temperature and the outside temperature

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must not be less than 10 degrees Celsius

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However, this is not the case in the workplace where electronic calculators, computers, and precision equipment are installed

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where necessary measures are taken to keep the workers warm

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When using centralized air purification systems

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indoor temperature must be between 17 degrees Celsius and 28 degrees Celsius

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and relative humidity must be between 40% and 75%

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Necessary measures shall be taken to prevent the spread of noise or vibration

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that may adversely affect indoor workers

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such as installing ceilings and isolation walls with sound absorption functions

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Drinking water supplied to indoor workers

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must meet the national water quality test standards

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Drainage systems must be repaired or cleaned 

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as not to interfere with normal functions



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Rest facilities that workers can use during breaks must be installed.

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In order to keep the office clean at all times

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it should be cleaned using a method that can suppress indoor dust as much as possible

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When there is a risk of exhaust fumes or other pollutants entering the room from the outside

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measures such as rearranging air inlets such as vents, windows, and doors should be taken

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Additionally, in order to prevent air pollution in the office due to microorganisms

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microorganisms contaminating the building surface and air purification systems must be removed

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and regular control and cleaning should be performed at least once every six months

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The illuminance of the indoor work surface should be adjusted to the standard set according to work type

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Ultra-precise work illumination must be over 750 lux, precision work over 300 lux

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regular work over 150 lux, and other work over 75 lux

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Indoor lighting and lighting should be done in a way that

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does not have a severe contrast and does not produce glare

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In addition, indoor lighting facilities should be

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inspected regularly, at least once every six months

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To manage working conditions, workers should maintain an appropriate working posture

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Employees should get enough rest during work, walk and move their bodies frequently during breaks

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and sometimes work while standing from time to time

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To maintain the correct working position, elements of the workstation

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such as chair, monitor and desk must be carefully positioned

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Make sure the space under your desk is enough to move your legs freely

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and make sure there is space to easily sit up and down

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Computer work position is especially important

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The angle of the backrest of the chair should be 90°~110° when entering data and for other work, the angle should be 100°-120°

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Elbow height must be adjusted to align with the keyboard

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The angle of the arm should be at least 90° between the upper and lower arms

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and the upper arm should be naturally fixed to the side

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The lower arm, wrist, and back of the hand should be horizontal

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and the distance between the eye and the center of the screen should be over 40 cm

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The monitor should be tilted so that the eye can see the center of the screen at a right angle

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While sitting on a chair the distance between the seat of the chair

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and the workers calf should have enough space to fit a finger

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To manage long work hours, overtime should be minimal

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and workers must have sufficient time to rest during work

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Also, you can change the type of work to lower fatigue and stress

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and employers must provide a space to rest during work hours

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Now we will discuss work safety training to manage accident factors

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The training should include employee's role in discovering and removing hazards

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and describe potential hazards that could cause harm to the employee

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In addition, employers should conduct risk assessments on a regular basis

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Prepare in advance by selecting evaluation targets

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and identify harmful and risk factors related to the work

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After identifying risks and hazards

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determine whether the estimated risks are acceptable

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Establish and implement risk reduction measures and record their implementation and results

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For safety when using electrical appliances

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install waterproof covers on plug connectors where moisture can enter

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and replace or insulate electrical appliances with damaged coverings

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Wires installed on passageways should firmly be fixed using wire protection covers

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and plug connectors and electromechanical devices should be grounding types

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Now we will look at improvement measures by accident type

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The first type of accident is caused by improper use of footrests and unsafe posture

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The risk factors when replacing light bulbs include

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unconsciously use a nearby rotating chair as a footrest or

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working in an unstable position which can both leading to falling

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As an improvement measure, a mobile ladder can be used for light-replacement work and

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when using the ladder, they must work in groups of two. Also, work is prohibited while standing on the top footboard

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The second type of accident is a disaster that can occur when traveling

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You could trip over neglected file boxes or wires

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or could trip from an unclosed drawer door

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Improvement measures include removing anything that can cause tripping in advance and

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not leaving or stacking items in the hallway

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The third type of accident is a disaster that can occur when using hand tools

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You could hurt your hand with a knife or awl due to carelessness

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Injury often occur when you get used to using the tool and get distracted

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Improvement measures include concentrating when using hand tools

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and when cutting multiple layers or paper or something thick, do not try to cut at once

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but cut over several slashes

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The fourth type of accident is a disaster caused by handling heavy objects

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Risk factors include sudden handling of heavy objects, excessive use of force

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or musculoskeletal disease risk due to repeated handling of heavy objects

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Improvement measures include using auxiliary devices when moving heavy objects

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moving objects in groups of two

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and stretching before and after moving the objects

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The last type of accident is a disaster caused by incorrectly stacking objects

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You could get hurt when an improperly stacked object falls from top of the cabinet

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or when the stack collapses while removing an item from the middle

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Improvement measures include not stacking objects on top of cabinets

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and when necessary, store and stack them neatly

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and when taking objects from up high, use appropriate and safe footstools