Scaffold safety email

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Scaffold safety email

  1. 1. Supported Scaffold Safety Johnanewquist@gmail.com Draft 4 30 2014
  2. 2. Nov 2013 • The victim was working outside the sixth floor of New York University’s Languages and Literature Building on the corner of University Place and W. 8th St. when he plunged from the sixth floor level about 11:20 a.m., police said. • The victim, in his 40s, landed on the roof of the neighboring two-story NYU Cantor Film Center.
  3. 3. Aug 2013 • Work resumed today at McDowell High School where eight workers were injured Monday due to a scaffold collapse.
  4. 4. June 2013 • Virginia Tech • Several construction workers were taken to the hospital after an incident at the Davidson Hall construction site on campus. • A hydraulic construction scaffold collapsed late Friday morning and one end of the platform fell approximately 20-25 feet before striking the ground.
  5. 5. NY 2012 • Three workers were injured Thursday after a scaffolding structure they were working on collapsed in Manhattan. • Officials say it happened just after 9 a.m. at 366 Broadway between Franklin and White Streets. • They say workers were putting up scaffolding on the sidewalk when the framing collapsed.
  6. 6. Common Scaffold Hazards • No guardrails on scaffolds. What else is wrong?
  7. 7. Common Scaffold Hazards • Defective wood planks and inadequate planking overhang.
  8. 8. Common Scaffold Hazards • Unsafe access to scaffold.
  9. 9. Common Scaffold Hazards • Cross bracing not adequate.
  10. 10. Common Scaffold Hazards • Inadequate footings.
  11. 11. General Requirements • Erect/dismantle all Scaffolds According to the Manufacturer's Instructions and Competent Persons (CP) Direction 11
  12. 12. General Requirements • All scaffolds are to be capable of supporting, without failure, at least • 4 times the maximum • intended load. 12
  13. 13. General requirements Design load • The design load of all scaffolds shall be • calculated on the basis of: • Light--Supporting 25 lbs per square foot • Medium--Supporting 50 lbs. Per square foot • Heavy-- Supporting 75 lbs. Per square foot Where is the overload? 13
  14. 14. General Requirements • Stable Footings • Base Plate, Screw Jacks & Mudsills
  15. 15. Planks with Visible Defects MUST NOT be Used 15
  16. 16. Base Plate & Mudsill Required 16
  17. 17. Proper Scaffold Base 17
  18. 18. Masonry Blocks & Bricks NOT Acceptable as Scaffold Base 18
  19. 19. General Requirements • Platforms at Least 18” Wide • Ladder Jack, Pump Jack, Top Plate, and Roof Brackets Can Be 12” Wide 19
  20. 20. General Requirements • Each platform on all working levels must be fully planked and secured to prevent movement. 20
  21. 21. General Requirements • Wood scaffold planks must be nominal 2” x 10”. • Must be Scaffold Grade Planks or equivalent.
  22. 22. General Requirements • Planks Extend 6” Past Supports or Secured 22
  23. 23. General Requirements • Or Cleated to prevent plank movement 23
  24. 24. General Requirements • Front edge of all platforms within 14” of face of work • Exceptions: • 3” for outrigger scaffold • 18” for plastering and lathing operations
  25. 25. 2010 Death • Event Date: 01/26/2010 • Employee #1 was accessing the bracket scaffolding by exiting a second floor window. • There was a 15 inch space between the bottom of the eave and the top of the scaffold plank. • While in the process of accessing the roof employee #1 apparently slipped and fell between the house and the scaffold plank, landing 27 feet below on the frozen ground.
  26. 26. Fully Braced Scaffold • Scaffolds must be braced per manufacturer’s instruction 26
  27. 27. Competent Person • Inspect scaffolding and components prior to each work shift
  28. 28. Competent Person • Evaluate connections to support load and prevent swaying • Determine structural soundness when intermixing components manufacturer • Train erectors and dismantlers to recognize work hazards • Determine feasibility of providing fall protection and access
  29. 29. General Requirements Access • Do not stand on ties, guardrails, or extensions • 16 ½ Inches between rungs Violation 29
  30. 30. Portable Access Ladder • Must be secured to prevent displacement. • Extend at least 3’ above landing to provide a handhold. 30
  31. 31. Attachable Access Ladder 31
  32. 32. Scaffold Stairway 32
  33. 33. 1926.451(f) Use Proper clearance near overhead lines Keep 10 foot minimum unless de-energized,
  34. 34. Scaffold Fall Protection • Scaffolding 10’ or higher must have some means of fall protection:  guardrails or  personal fall arrest system (PFAS) 34
  35. 35. Scaffold Fall Protection • Toprails installed between 38” and 45” High. • Midrails installed halfway between toprail and platform.
  36. 36. Scaffold Fall Protection • Cross bracing OK as guardrails if the center point is between • 20” to 30” for Midrail and • 38” to 45” for Toprail.
  37. 37. Scaffold Fall Protection • Toprails to 200 lbs. of force • Midrails to 150 lbs. of force in any direction
  38. 38. Falling Object Protection • Anyone working on or around a scaffold must wear a hard hat. • Workers on or below scaffolds must be protected from falling objects by: • Toeboards • Mesh • Screens; or • Equivalent measures
  39. 39. Wind • Enclosing scaffold will create wind load • Engineering calculations needed.
  40. 40. Scaffold Safety Training • All employees must be trained prior to working on scaffolds. • Qualified person must conduct the training and include the following: – Electrical Hazards – Fall Protection – Falling Object Protection – Proper Use – Material Handling – Load-carrying Capacities 40
  41. 41. Questions

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