CSOC Scaffold Safety 1 — Questions and Answers
Question 1: At what minimum height above ground are guardrails required on a scaffold platform in Singapore?
- 1 metre
- 1.5 metres
- 2 metres (Correct answer)
- 3 metres
Correct answer: 2 metres
Under Singapore WSH (Scaffolds) Regulations, guardrails must be provided when the working platform is 2 metres or more above the ground.
Question 2: What is the minimum width required for a scaffold working platform under Singapore WSH regulations?
- 300mm
- 450mm
- 500mm (Correct answer)
- 600mm
Correct answer: 500mm
Singapore WSH (Scaffolds) Regulations require working platforms to be at least 500mm wide to provide adequate and safe working space.
Question 3: What is the minimum required height of a toe board fitted on a scaffold platform?
- 100mm
- 150mm (Correct answer)
- 200mm
- 250mm
Correct answer: 150mm
Toe boards must be at least 150mm high to prevent tools, materials, and debris from rolling or sliding off the scaffold platform edge.
Question 4: What does a green scaffold tag indicate?
- The scaffold is restricted to authorized personnel only
- The scaffold is under construction and not safe for use
- The scaffold requires minor repairs before use
- The scaffold has been inspected and is safe to use (Correct answer)
Correct answer: The scaffold has been inspected and is safe to use
A green scaffold tag confirms that the scaffold has been inspected by a competent person and is safe for all workers to use.
Question 5: Who is authorized to inspect and certify a scaffold for use in Singapore?
- Any experienced construction worker with over 5 years on site
- A competent person with recognized scaffold inspection training (Correct answer)
- The project manager or site manager
- The scaffold supplier's representative
Correct answer: A competent person with recognized scaffold inspection training
Under Singapore WSH regulations, only a competent person holding recognized training and certification in scaffolding may inspect and certify scaffolds.
Question 6: What is the minimum overlap required between adjacent scaffold planks on a working platform?
- 150mm
- 200mm
- 300mm (Correct answer)
- 450mm
Correct answer: 300mm
Scaffold planks must overlap by at least 300mm to prevent them from tipping or becoming dislodged when loaded.
Question 7: What is the primary purpose of base plates in a scaffold structure?
- To connect the scaffold securely to the building facade
- To provide anchorage points for safety harnesses
- To distribute the scaffold load over a wider ground area (Correct answer)
- To support the top guardrail of the scaffold
Correct answer: To distribute the scaffold load over a wider ground area
Base plates spread the load of the scaffold standards (vertical poles) over a larger area to prevent them from sinking into soft or uneven ground.
CSOC Scaffold Safety 1
At what minimum height above ground are guardrails required on a scaffold platform in Singapore?