하절기 건설현장 안전보건 가이드(영문)

Safety measures by danger factor in summer

What are the dangers that can be found in the construction site?

Contents

Analysis of the current status of accidents in construction sites

Analysis of Accidents in Construction Sites

Analysis of accidents for the past 2 years

Types of accidents in 2006

Fatal accidents and accidents between June and August

Category Accident Victims No. of Deaths

2006 17,956 632

2005 15,918 609

Increase·Decrease 2,038 23

12.8% increase in the number of accident victims (2,038 persons)

12.8% increase in the number of accident victims (2,038 persons)

3.8% increase in the number of deaths (23 persons)

3.8% increase in the number of deaths (23 persons)

Analysis of accidents for the past 2 years


Fall5,873

persons

Fall5,873

persons

Falling to the same level2,855

persons

Falling to the same level2,855

persons

Collision2,275

persons

Collision2,275

persons

Struck by falling object

2,108 persons


2,108 persons

account for 73% of the total account for 73% of the total no. of accidents.no. of accidents.

account for 73% of the total account for 73% of the total no. of accidents.no. of accidents.

32.7%

15.9%

12.7%

11.7%

Among the 17,956 victims17,956 victims in in 2006,2006,

Among the 17,956 victims17,956 victims in in 2006,2006,


1,709

1,376 1,4371,452

1,652

1,455

-

500

1,000

1,500

2,000

June July August

20062005

The no. of accidents occurring in summer (June~August) accounts for more than 26% of the total no. of accidents.

Victims

Accidents between June and August


Deaths

46

5459

33

6466

-

20

40

60

80

June July August

20062005

Fatal accidents between June and August

The no. of accidents occurring in summer (June~August) accounts for more than 25% of the total no. of accidents.


Safety Measures by Danger Factor in Summer

Downpour

Landslide

Collapse of form shore

Electric shock


Suffocation

Health problems in summer

Safety checklist

DangerfactorsDangerfactors

Landslide caused by downpourLandslide caused by downpour

Damage to buildings/facilities due to the weakening of land or damage to underground utility works

Damage to buildings/facilities due to the weakening of land or damage to underground utility works

Suspension of construction and physical loss due to flooding

Suspension of construction and physical loss due to flooding

Safety measures for downpourSafety measures for downpour


Safety m

easures

Safety m

easures

Stock up on emergency flood prevention materials and equipment.

Organize and manage an emergency team.

Check the current underground utility works and maintain a mutual assistance system with related organizations.

Inspect the facilities around the site to prevent loods.

Perform safety inspection and take action in advance against facilities that are vulnerable to rain.


Case of Accident and Actions


Death during landslide caused by downpour

Install slope protection. Install hill top channel and raceway. Install a drainage system.


Danger factorsDanger factors

The rainwater percolates in the slope and loosens the soil. This causes landslide.

The rainwater percolates in the slope and loosens the soil. This causes landslide.

Danger of retaining wall collapsing - Loose soil caused by rainwater - Earth pressure increase due to increase in rainwater

Danger of retaining wall collapsing - Loose soil caused by rainwater - Earth pressure increase due to increase in rainwater

Collapse of retaining wall and stonework due to damaged drainage systemCollapse of retaining wall and stonework due to damaged drainage system

Safety measures for preventing landslideSafety measures for preventing landslide


Safety m

easures

Safety m

easures

Conduct safety inspection and take action in advance to prevent tunnel cave-in.

Prohibit the passing of cars or placing of materials to avoid increasing the load above the tunnel.

If the tunnel is in danger of caving in, or if there is danger of soil/rock falling, install a retaining wall or prohibit the entry of workers to the site.

Check the state of retaining wall and take safety actions if necessary.


1 person was crushed to death when the land above the dug tunnel caved in.

Observe the ground digging surface gradient. If impossible, install a retaining wall.





Form shore collapses during the casting of concrete.

Form shore collapses during the casting of concrete.

Safety measures for collapsing form shoreSafety measures for collapsing form shore


Safety m

easures

Safety m

easures

Investigate the form shore structure and observe the assembly instruction.

• The performance of shore must be verified.• For those with height of more than 3.5m, a horizontal

connector must be installed every 2m.• For the slope timbering, a wedge must be installed to

distribute the weight on the post veneer.• In case of high floor or thick slave, the system shore

must be used.• More than 2 steel pipe supports cannot be used.



Case of Accident and Actions Death caused by

constriction by concrete when form shore collapsed

during the casting of concrete

Inspect the form shore structure and construct based on the assembly instruction.

Install horizontal connectors.

Observe the casting time and order.



Electric shock while handling electrical machineries and tools during the rainy season

Electric shock caused by flooding in electrical facilities

Electric shock caused by contact with electric chargers

Safety measures for preventing electric shockSafety measures for preventing electric shock


Safety m

easures

Safety m

easures

• A temporary power receiving unit must be installed in a safe place with no possibility of flood.

• Electrical machineries and tools must not be handled with wet hands.

• Portable electrical machineries and tools must be unplugged before use.

• Conduct safety inspection on wiring and temporary wiring for portable wiring.

• Do not touch processing wires; install an insulation protection unit near the worker.




While installing a dust net from the external double scaffold, the worker got electrocuted.

Avoid electric wires or install insulation when working near electric wires.

Install an insulation protection unit on the charging wire.



Danger of getting struck by falling objects from high places due to wind

Danger of getting struck by falling objects from high places due to wind

Safety measures for preventing impact due to falling objectsSafety measures for preventing impact due to falling objects


Safety m

easures

Safety m

easures

• Various installations, safety notice boards, and load must be installed firmly and reinforced to resist strong wind.

• Do not work during heavy downpour or strong wind. Take shelter until the weather improves.

• Inspect the state of the net for blocking falling objects.




Collapse of scaffolding due to strong wind

Reinforce the connection of scaffolding to the wall.

If dust net or curtain net is installed on the scaffolding, make sure it is not affected by strong wind by installing a ventilation opening.



Suffocation caused by the lack of oxygen due to the decomposition of organic matter of growing microorganisms that live in tanks, manholes, and pits during summer

Suffocation caused by the lack of oxygen due to the decomposition of organic matter of growing microorganisms that live in tanks, manholes, and pits during summer

Suffocation caused by breathing in organic vapor when working with waterproof solution and paint containing organic solvent in a closed area

Suffocation caused by breathing in organic vapor when working with waterproof solution and paint containing organic solvent in a closed area

Safety measures for preventing suffocationSafety measures for preventing suffocation


Safety m

easures

Safety m

easures

When working in closed tanks, manholes, sewage, or pits for a long time, make sure the oxygen content is above 18%.

Install a ventilation unit when working with organic solvent in a closed space.

Secure the pathway and conduct safety training for workers to enable prompt escape in case of emergency.




Breathing in organic vapor while working with waterproof solution and paint with organic solvent in a closed space

Install a ventilation fan and make sure the oxygen content is above 18%.

Measure the oxygen content before and during work.

Install an escape path that can be used for workers’ escape in case of emergencies.


Install and manage a resting lounge where workers can rest from the heat while working in the construction site in summer.

Try not to work outside from 1pm to 3pm, the hottest times in summer.

Drink a glass of cold water every 15~20 minutes while working.

Measures for preventing health problems in summerMeasures for preventing health problems in summer




Health problem due to overworking in hot summer

Avoid working outdoors for too long in summer.

- Divide the working time and resting time reasonably.

Take in sufficient amount of water and salt.


02

▶ It is easy for workers who wear helmet and safety boots while working in construction sites to get athlete’s foot.

Avoid getting

athlete’s foot in

summer.

- Put on safety boots alternatively.

- Maintain cleanliness by cleaning the feet regularly.

- Consult a doctor and get treatment immediately once you develop athlete’s foot.

Health Management Tip

Health Management Tip


03

▶ Workers working outdoors must maintain their health during summer.

Drink cool

water often.

- Protect the skin and eyes from damage due to UV rays.

- Do not work topless or expose too much skin under the sun.

- Ensure sufficient intake of water and salt when working next to a road with poor radiant heat.

- Avoid working between 1pm and 3pm, the hottest times during summer.

Avoid working

between 1 pm and 3

pm.


Emergency action

Move to a cool place with shade

and take off or loosen the

victim’s clothes.

Give 1 liter of water and

bring the victim to a hospital

if he/she loses consciousness

or the temperature of his/her

body rises.


Flood prevention plan

Safety checklist for the construction site in summerSafety checklist for the construction site in summer

Item Inspection Result

Prearranged plan

○ Measure the forecasted amount of rainfall and draft drainage plan.

○ Check the flood control materials. - Water pump (including a substitute in case one breaks down),

sandbag, straw bag, spade, wheel cart, rain gear, and rain boots

○ Check the emergency contacts.○ Check the organization and management of the

emergency team.○ Check the measures to be taken during emergencies.

- Materials and equipment sheltering plan during downpour


Inspection of facilities around the site

Item InspectionResul

t

Facilities around the site

○ Maintenance state of drainage facilities - Check the drainage way.- Install catchment well and grit chamber.- Connection state with nearby drainage system- Check the repair and maintenance state of the drainage way th

at is vulnerable during the rainy season.○ Check the operation state of the water pump.

- Check whether the water pump works. - Check whether the water pump that works on gas in case of po

wer failure is available.○ Safety state of temporary road for construction

- Safety of road and state of soil- Check whether left-right drainage is installed.

○ Check for cracks on the road.


Prevention of collapse

Item InspectionResul

t

Dug slop

e

○ Check for any problem in slope state as well as whether the grade standard has been observed.- Joint and crack

○ Check the drainage way and maintenance.- Hill top channel, raceway, drainage way

○ Check whether slope protection measures have been taken.- Vinyl tent, sandbag, and straw bag

○ Check whether entry to the dug slope is prohibited.

Retaining wall

○ Check the removal of earth and sand and falling rocks.○ Check the entire drainage and cleaning.○ Check for cracks on the wall or change in shape.



Retaining wall

○ Check the assembly instruction as well as whether the order has been followed.

○ Research and inspection- Check the intersection area as well as for any damage, change in shape,

or fall-off.- Check for any damage in the joining state in the supporting point.- Check for any crack in braced wall.

○ Check out the measure for the prevention of the horizontal support bucking.- The connection part must be installed on the supporting point of middle

pile.- The machine or material to be supported must not be stacked.- Check the jack intersection of the horizontal support and the stiffener

used.○ Check the prevention of earth and sand outflow.○ Check the measurement management.○ Check the following when installing braced wall:

- Air space at the back of braced wall- Reinforcement of area that will get wet in braced wall due to irrigation

channel- Any use of prohibited braced wall connection- Installation simultaneous to digging


Electric shock prevention


Electric

shock

prevention

○ Safety state of temporary wiring - Safety during flooding - Height of gate and grounding - Danger sign prohibiting entrance

○ Safety state of temporary cabinet panel - Outer grounding - Installation and lock state of cabinet panel locking device - Internal circuit marking for cabinet panel - Short circuit breaker on cabinet panel circuit - Protective cover in internal charger - Use of power outlet

○ Other machines and small electrical tools - Outer grounding - Use of electrical drill, light projector



Electric

shock

preventio

n

○ Installation state of wiring and portable wiring - Exposure to road and pathway- Existence of metal (make sure no metal is used)- Use of waterproof outlet and plug when used outdoors- Damage to insulation clothing

○ State of exchange arch welder- Make sure only an automatic electric shock blocker that passed the

performance test is used.- Outdoor grounding- Check the use of wiring and holder standardized item as well as for

any damage to insulation clothing.- Insulation of the terminal connection area

○ Groundwater pump- Short circuit breaker- Outdoor grounding- Insulation of the terminal connection area- Appropriateness of the water pump-raising rope (use manila rope)


Suffocation prevention


Suffocatio

n preventio

n

○ Installation and operation of the ventilation unit when painting in closed space, e.g., tank and water tank- Avoid using excessive material when painting.

○ When spray painting, always use a mask.○ When working at night, secure sufficient lighting.○ Check the oxygen content before working inside manholes, pits,

or tanks.- Make sure the oxygen content is above 18% before and during work

by using a ventilation fan.

○ Check the use of equipment with internal combustion engine inside the manhole or tunnel where ventilation is insufficient.- Install a ventilation unit to maintain air quality when using a machine

with internal combustion engine.


Item InspectionResu

lt

Suffocatio

n preventio

n

○ Check the oxygen content before working in a tank that had or currently contains inert gas such as argon gas.- When oxygen content is below 18%, install a ventilation fan to

maintain oxygen at above 18%.○ When using adhesive such as super glue (organic solvent) in

closed space, install a ventilation fan.○ Check the oxygen content when installing a retaining wall in

closed space in underground water purifier tank and water tank and dismantling the wall after curing or casting the concrete.

○ Wear air-supplied respirator when working in a place with oxygen deficiency.

○ Make sure there is a ladder or a fiber rope that can be used for workers’ escape and rescue during emergencies or accidents.

○ Assign a person in charge of safety when working with organic solvent and conduct special safety training.


Prevention of impact due to falling objects


Prevention of impa

ct due to

falling

objects

○ Appropriateness of installation of temporary materials or signboards- Check whether the scaffolding meets the installation standard.- Check the installation of ventilation hole to prevent the scaffolding

installed outdoors from moving in case of strong wind.- Check whether the platform is fixed.- Check for any loose materials or parts on the roof.

○ Checking the installation of net for blocking falling objects and its appropriateness- Net installation and between scaffoldings, net between scaffolding

and building- Appropriateness of net angle and horizontal projecting part state

(angle: 20~30°; projecting part length: more than 2m)○ Neatness of various materials○ Rotation limiting switch based on the tower crane’s mutual

interference○ Stop working in case of strong wind and take emergency

actions.


What are the Dangers That Can be Found in the Construction Site?

Fall

Struck by falling objects

• Collision

• Electric shock

The scaffold must be fixed in a workplace that is more than 2m

high. A safety guardrail must also be installed.

Working scaffold

Fall


- Do not use a wooden

ladder built on-site.- Prevent the ladder

from falling.- Do not use a ladder for

working.

Ladder


Fix the opening cover or install a safety guardrail.

Opening


Work after fixing the platform, safety guardrail, and elevating unit safely.

Portable scaffolding


When a safety guardrail or

a cover cannot be installed,

install a fall prevention net

instead.

Fall prevention net


Install a net for blocking falling

objects or a protective shelf outside

the building and entrance/exit for use by the

workers.

Net for blocking falling objects

Struck by falling objects


Control the entry of workers to a working area

with danger of objects falling from above.

Controlling entry


When using construction machineries,

assign a signaler to prevent people

from coming near the machines.

Construction machineries

Collision


Use short circuit breaker

for electromotion machineries or

tools.

Short circuit breaker

Electric shock


Ground the outer metal cover

for electromotion machineries

and tools.

Grounding


Thank you.

Education

하절기 건설현장 안전보건 가이드(영문)