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Working in Cold Conditions Cold Weather. Cold Workplaces Roofs in cold weather Bridges near large bodies of water High buildings exposed to wind Refrigerated.

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Presentation on theme: "Working in Cold Conditions Cold Weather. Cold Workplaces Roofs in cold weather Bridges near large bodies of water High buildings exposed to wind Refrigerated."— Presentation transcript:

1 Working in Cold Conditions Cold Weather

2 Cold Workplaces Roofs in cold weather Bridges near large bodies of water High buildings exposed to wind Refrigerated rooms or containers Commercial fishing areas Steel structures that retain cold Unheated warehouses in cold climates

3 Goals Cold-Related Illnesses and injuries and first aid Treatment Risk Factors and Prevention Measures Quiz

4 Body reacts to cold by: Trying to maintain core temperature of 98.6ºF Decreasing blood flow to extremities to prevent heat loss which –Keeps internal organs warm –Increases chance of frostbite Shivering generates heat

5 Hypothermia Progressive loss of body heat Accelerated when person is wet Most cases occur in air temperatures between 30ºF and 50ºF Can occur in air temperatures as high as 65ºF Occurs in water at 72ºF

6 Mild Hypothermia Shivering and chattering teeth Blue lips and fingers Poor coordination

7 Moderate Hypothermia Mental impairment and confusion Disorientation and poor decision making Inability to take precautions from the cold Slower heart rate and breathing rate Slurred speech

8 Severe Hypothermia Resembles death Unconsciousness Irregular or hard-to-find pulse No shivering No detectable breathing

9 First Aid for Hypothermia Move victim to shelter Remove wet clothing and wrap victim in warm covers Apply direct body heat Re-warm neck, chest, abdomen, and groin first Give warm, sweet drinks if conscious Monitor breathing, administer CPR Get medical help

10 Frostbite Exposure to severe cold or contact with cold objects Affects fingers, toes, cheeks, nose, and ears Tissue freezes at 30ºF May cause gangrene More susceptible to future frostbite Tissue deathamputation or loss of function

11 Frostbite Symptoms Sensations of coldness Tingling, stinging, or aching sensation Skin feels numb and cold to the touch Skin is waxy and appears white Blistering, turning red, then black

12 First Aid for Frostbite Warm gradually with body heat Do not rubmay result in more tissue damage Use water between 102°F-110°F Apply sterile dressing to blisters Do not thaw if risk of re-freezing Get medical attention; thaw at hospital

13 Goals Cold-Related Illnesses and injuries and first aid Treatment Risk Factors and Prevention Measures Quiz

14 Environmental Cold Stress Factors Low temperature Cool, high winds Dampness Cold water

15 Wind Chill Temperatures Combined effect of air temperature and air movement

16 Other Risk Factors Inadequate or wet clothing Drug use or certain medications A cold or certain diseases Male gender Age Heart condition Physical condition

17 Environmental Protection Heated shelters Windscreens On-site sources of heat Thermally insulated tools and work surfaces

18 Administrative Controls Work and Warm-up Schedule for 4-hour Shift

19 Protective Clothing Several layers of clothing Synthetic fibers next to skin to whisk away sweat Water-repellent, wind- resistant outer clothing Hats, hoods, or face covers Insulated, waterproof footgear Insulated, waterproof gloves Change of clothing available

20 Hand Protection Wear gloves when fine manual dexterity is not required Use tools and machine controls designed for gloved hand operation Limit bare hand work to minutes when < 60ºF Use warm air jets, radiant heaters, contact warm plates Use metal handles covered by thermal insulating material Prevent contact frostbite when near metal surfaces < 20ºF

21 Other Protective Controls Be medically fit Eat high calorie foods Consume warm, sweet drinks and soups Avoid coffee Stay in good physical condition

22 Safe Work Practices Avoid heavy perspiration Work in the warmest hours of the day Minimize prolonged sitting, standing Allow time to adjust to cold Do not work alone Watch for symptoms of cold-related illness

23 Goals Cold-Related Illnesses and injuries and first aid Treatment Risk Factors and Prevention Measures Quiz

24 Summary Symptoms of hypothermia and frostbite First aid treatment Wind chill factor Engineering and administrative controls Protective clothing and staying dry

25 Quiz 1.The body responds to cold by shivering and _____________________________________ 2.Hypothermia can occur in air temperatures as high as 65ºF. True or False 3.Describe at least three symptoms of hypothermia. 4.Describe at least one form of environmental protection for workers in the field. 5.Other risk factors of cold-related illness include: certain medication, certain diseases, age, and physical condition.True or False

26 Quiz (cont.) 6.Drinking coffee will help workers stay warm. True or False 7.Describe at least three symptoms of frostbite. 8.Warm up frostbitten areas by rubbing gently. True or False 9.Environmental cold stress factors include: temperature, wind, and __________________ 10.Administrative controls, such as __________, can be used to protect workers from overexposure to cold conditions

27 Quiz Answers 1.Decreasing blood flow to the extremities 2.True, when other contributing factors are present 3.Confusion, disorientation, slow heart rate and breathing, shivering, blue lips, poor coordination, slurred speech 4.Heated shelters, windscreens, heat sources, thermal insulated tools 5.True

28 Quiz Answers (cont.) 6.False, coffee increases blood flow to the extremities 7.Cold sensation, tingling, aching, numbness, white skin, waxy skin 8.False, rubbing will contribute to the skin damage 9.Dampness 10. Limiting work time or taking additional breaks


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