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BUILDING TRADE SAFETY

BUILDING TRADE SAFETY. CONFINED SPACES. BUILDING TRADE SAFETY. Confined spaces. BUILDING TRADE SAFETY. THE DEFINITION OF A CONFINED SPACE IS GENERALLY RECOGNIZED AS A SPACE THAT:. Has limited or restricted means of entry or exit. Is large enough for a person to enter to perform tasks.

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BUILDING TRADE SAFETY

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  1. BUILDING TRADE SAFETY CONFINED SPACES

  2. BUILDING TRADE SAFETY • Confined spaces

  3. BUILDING TRADE SAFETY THE DEFINITION OF A CONFINED SPACE IS GENERALLY RECOGNIZED AS A SPACE THAT: • Has limited or restricted means of entry or exit. • Is large enough for a person to enter to perform tasks. • Is not designed or configured for continuous occupancy. • Has the potential for a significant hazard to be present.

  4. BUILDING TRADE SAFETY • In the U.S., entry into permit-required confined spaces must comply with regulations promulgated by the Occupational Safety and Health Administration (OSHA). • These regulations include developing a written program, issuing entry permits, assigning attendant(s), designating entrants, and ensuring a means of rescue.

  5. BUILDING TRADE SAFETY According to OSHA, a permit-required confined space (permit space) has the three characteristics listed above (which define a confined space) and one or more of the following: • Contains or has the potential to contain a hazardous atmosphere.

  6. BUILDING TRADE SAFETY • Contains a material that has the potential for engulfing the entrant. • Has an internal configuration that might cause an entrant to be trapped or asphyxiated by inwardly converging walls or by a floor that slopes downward and tapers to a smaller cross section. • Contains any other recognized serious safety or health hazards.

  7. BUILDING TRADE SAFETY • In addition to the hazards posed by the design of the space, work activities can also pose serious safety hazards (heat, noise, vapors, etc.) that must be taken into account when identifying safety measures that must be taken. STEAM TUNNELS POSE A THREAT FROM BURST STEAM LINES AND 140+ DEGREE TEMPS.

  8. BUILDING TRADE SAFETY CONFINED SPACES SOME EXAMPLES OF CONFINED SPACES; STORAGE TANKS AND VESSELS SEWERS AND MANHOLES UNDERGROUND UTILITY VAULTS AGRICULTURE SILOS RAILCAR TANKS TUNNELS GRAIN ELEVATORS MARINE VESSEL TANKS

  9. BUILDING TRADE SAFETY ATMOSPHERIC HAZARDS • These affect air quality and present immediate hazards to health or life. • Acceptable atmospheric conditions must be verified before entry, and must be monitored continuously while the space is occupied. • The oxygen concentration, the presence of toxic gases, and flammable material are the three conditions that must be monitored.

  10. BUILDING TRADE SAFETY ATMOSPHERIC HAZARDS • The presence of combustible substances (methane), carbon monoxide, hydrogen sulphide or lack or surplus of oxygen must be tested for before anyone can enter a confined space. • Anyone entering a confined space must have the proper training and be certified for confined spaces.

  11. BUILDING TRADE SAFETY FOUR GAS DETECTOR PPM= Parts per million LEL= Low explosion limit THE SENSOR IS LOWERED DOWN INTO THE CONFINED SPACE TO SAMPLE THE AIR QUALITY

  12. BUILDING TRADE SAFETY • The results of the four gas test have to be recorded and documented on the permit • Continued monitoring of the confined space is necessary to ensure continued safety.

  13. EFFECTS OF OXYGEN ENRICHED & DEFICIENT ATMOSPHERES OXYGEN EFFECTS & CONTENT SYMPTOMS 23%Oxygen enriched, extreme fire hazard 20.9%Oxygen concentration in normal air 19.5% Minimum permissible oxygen level. 15% to 19%Decreased ability to work strenuously, may impair coordination and may cause early symptoms for persons of coronary, pulmonary or circulatory problems 10% to 12%Respiration further increases in rate and depth, poorjudgment and blue lips. 8% to 10% Mental failure, fainting, unconsciousness, ashen face, nausea and vomiting. 6% to 8% Recovery still possible after four to five minutes, 50% fatal after 6 minutes, fatal after 8 minutes. 4% to 6% Coma in 40 seconds, convulsions, respiration ceases,Death BUILDING TRADE SAFETY

  14. BUILDING TRADE SAFETY

  15. BUILDING TRADE SAFETY PERMIT REQUIRED CONFINED SPACE ENTRY PROCEDURE; • Isolate the space • Ventilate the space • Conduct tailgate • Complete permit • Test the atmosphere • Enter the space.

  16. BUILDING TRADE SAFETY CONFINED SPACES RESCUE REQUIREMENTS When working in confined spaces a worker retrieval system must be utilized.

  17. BUILDING TRADE SAFETY • Workers must wear a safety line at all times while in a confined space and a standby worker must be present at all times while work is being done in a confined space.

  18. BUILDING TRADE SAFETY • Injuries and fatalities involving confined spaces are frequent and often involve successive fatalities when would-be rescuers succumb to the same problem as the initial victim. • Approximately 60% of fatalities involve would-be rescuers and more than 30% of fatalities occur in a space that has been tested and found to be safe to enter

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