What is scaffolding?
Scaffolding is a temporary working platform to provide supports both men and materials for working place. It is used in maintenance, construction and demolition work etc.
Types of scaffoldings:-
Permanent scaffolding
Hanging scaffolding
Suspended scaffolding
Mobil scaffolding.
Q. What are the points to be checked while green tagging erected scaffolding?
Before using of scaffold check the tag (7 days validity).
Green tag we can use the scaffold and Red tag for not use and Yellow tag use only for scaffolding works.
Level and firmness of the ground.
Sole plate
Base plate
Standards
Ledger
Transom
Couplers
Planks (boards)
Toe boards
Braising
Guard rails
Mid rail
Out riggers
Ladders
Confined Space Interview
Q. What is Potential Hazards of scaffolding?
Collapse of Scaffolding.
Falling from height.
Falling object.
Slip & Trip hazards.
Pinch point hazards / Sharp edges
Opening without guardrail.
Scaffold erection during storm or high winds, raining and poor visibility.
Blocking emergency access and walkways
Q. What is the cause of scaffolding failure?
Slipping of unsecured ladder.
Use of unsuitable scaffold or faulty materials.
Inadequate or irregular platform width.
Omission of guard rails or toe boards.
Failure to proper secure the scaffold to the building or to brace it adequately.
Overloading on the scaffold platforms.
Unsafe Act & Unsafe Condition
Q. What is the precaution during scaffolding erection?
Scaffolding erection, dismantling should be done under the supervision of a COMPETENT PERSON (Scaffolding Supervisor).
Red Tag‟ means Danger “do not use” and Green Tag means “scaffold complete-ready for use” when completed.
Gap between boards/planks should be 1 inch (25mm).
Top guardrail, midrail and toe board should be provided.
Guard rails and Toa boards shall be fitted to the inside of standards.
Guard rail should have a height between 915 mm (0.9 m or 90 cm or 3‟ feet) to 1143 mm (1.15 m or 3‟ 9”)
Toe board should be 6” (15 cm) high and secured with toe board clips.
If scaffold to be erected on soft ground should be used sole plate.
Worker shall be not work on scaffolds during storms or high winds or poor visibility.
Sole plate shall extend under at least two standards.
Base plates with screw jacks should be proper scaffold leveling adjustment.
All standard shall be vertical.
Ledgers shall be securely fixed to standards couplers.
Scaffolds should be properly braced by cross bracing or diagonal braces or both for securing vertical members together.
Access ladder must be provided for any platform & clamped with scaffold structure.
Ladder should be 4:1 ratio and angle 750.
Ladder should be rise 1 meter (42 inch) above from the landing place/platform.
Scaffold should be not obstruct access to/from any fire fighting equipment / emergency equipment, operating area equipment, instrument and control panels, ladders, stairways etc.
Scaffold platform opening should be secured with guardrail and sign board.
All scaffolding couplers should be tightened.
