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Work At Height

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Published in: Mechanical
11,347 Views

Scaffolding

Sandeep K / Kolkata

3 years of teaching experience

Qualification: M.Tech. (Production Engineering)

Teaches: Chemistry, English, Hindi, Physics, Drawing, Mechanical

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  1. SCAFFOLDING Presented By: Sandeep Kumar (Department of Mechanical Engineering)
  2. Industrial Safety Industrial Work Working in confined spaces Hot working Working with Hazardous chemicals Working at height
  3. Industrial Safety Working at Height 3m working stand Hydraulic scissor platform Jhula (Man riding Basket) & access ladders Scaffolding
  4. Definition Scaffold are working platforms used to protect persons working at Height against falling down, and also to stop material and tools from falling down. ( As per IS 4014 - Part-I)
  5. Types of scaffolds Categories — Suspended — Supported, tubular Classification as per intended use — Light duty ( 251b / ft2 ) — Medium duty — Heavy duty
  6. Terminology
  7. c o Il SERER LONGTLDINA/- •CING TOE (STAN 8] N) 0) RI-INFER a...EDGER) B*SE PLATE SILL (SOLE BOARD) BAR LIFT LIFT) FUSE n.9.1 SCAFFOLD TERMINOLOGY
  8. @OARDS) INCUSING TOEmne CUPS POU2L.E) ca,mER B*SE n.9.3 TYPICAL TUBE AND COUPLER SCAFFOLD
  9. Scaffolding Tubular scaffolding are further divided in 3 groups: —Pipe & coupler ( Clamp) —H frame —Cuplock
  10. Scaffolding- Pipe & coupler, H Frame
  11. Criteria for Selection Flexibility of Height Freedom of rotation Ease of Erection ( Time ) Load bearing Capacity Storage space Material availability Availability of competent ( Experienced) contractor
  12. Schemes for scaffold erection
  13. N/A
  14. Learning Various types of scaffolds Supported, tube & coupler type Scaffolds with height to base ratio of more than 4:1 shall be restrained from tipping by guying, bracing, tying or the equivalent Scaffolds & scaffold components must support at least 4 times the maximum intended load Top rail & mid rails are reqd, else provide personal fall protection system.
  15. Learning The platform must not deflect more than 1/60 of the span when loaded The standard prohibits the use of cross braces as a means of access Access must be provided when the scaffold platforms are more than 0.6m (2 feet) above or below a point of access To protect employees from falling hand tools, debris & other small objects, install guardrails systems, debris nets or barricades. Employees must wear helmet.
  16. Do's & Don'ts Each person who could fall more than 2 meters shall be protected from falling by a fall protection system like guardrails, personal fall arrest systems. Fixed fall protection, such as guardrails are preferred over the use of personal fall arrest systems.
  17. Do's & Don'ts Top height of handrails shall not be less than 900mm & not more than 1200mm above the walking / working surface of a platform. Cantilever can be maximum 1 meter allowed.
  18. Do's & Don'ts Walkway plank should extend not less than 6" & not more than
  19. Do's & Don'ts Midrails shall be installed approximately halfway between the walking / working surface and the handrail.
  20. Do's & Don'ts In addition to wearing helmet, additional protection from falling objects may be provided by barricading the area below into which objects can fall and not permitting workers to enter the hazard area.
  21. Do's & Don'ts A safe means of entry and exit shall be provided and used like ladders, stairs/stairways, ramps.
  22. Do's & Don'ts Climbing of scaffold braces, runners, etc. is not permitted, except as required by scaffolder during scaffold erectiOn, alteration, and dismantling.
  23. Do's & Don'ts Good housekeeping shall be maintained to help prevent slipping, tripping, and falls. Oil spills, mud, scrap, and other debris shall be cleared up immediately.
  24. Do's & Don'ts Ladders can be used up to 6 meters of height Above 6 meters of height two separate ladder to be used or stair case module to be used. Additional access (ladder /stair ) is required for 5 meter & more long scaffolding
  25. Administration Tagging Red & Green Red Scafftag: Indicates that the scaffold has not been inspected or is not safe for use by anyone other than Scaffolder (for scaffold completion/rectification work only) Green Scafftag: Indicates that the scaffold is complete and is safe for use at the time of inspection. A green scafftag is valid for a maximum of two weeks.
  26. Administration Material belongs to Contractor Assembling / dismantling done by contractor Ownership / accountability of material by contractor (I.e. L&T will be charqed for damaqed material, if damaqed durinq use) Contractor is experienced (serving at RPL Jamnagar)
  27. Cost Contractor is paid by the volume If no. of days are more than 30, additional charge is applied
  28. What is expected from you Give requirement only when reqd After scaffolding is erected, ensure that no modifications are done which can result in unsafe condition For long duration work, check fortnightly (as per checklist) Immediately after use, get the scaffolding dismantled
  29. Color coding of scaffold material Contractor annually checks scaffolding material for wear / rusting etc. & certifies the material for usability by changing colour - 1st year --Red — 2nd year - - Yellow _ 3rd year - Blue — 4th year-- Red
  30. THANKS

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