CITB Specialists Temporary Works and Scaffolding 2

Question 1

What are the requirements for edge protection on a scaffold working platform used by specialist trades at height?

Accepted Answer

A top guardrail at minimum 950mm, a mid-rail, and a toe board at least 150mm high at every open edge

Answer

A single guardrail at any convenient height

Answer

Guardrails are optional if workers wear harnesses

Answer

Netting on the outside of the scaffold is sufficient

Question 2

A specialist contractor needs to erect a scaffold over a public footpath. What additional measures are required under UK regulations?

Accepted Answer

A gantry or protected walkway with overhead protection, lighting, and a licence from the local authority

Answer

Place warning signs and continue

Answer

Barrier tape across the footpath to divert pedestrians

Answer

High-visibility cladding on the scaffold

Question 3

When specialist scaffolding is erected in a location exposed to high winds, what additional design consideration must be applied?

Accepted Answer

A wind loading assessment must be carried out, and the scaffold designed to resist the calculated wind forces, with additional ties and bracing as required

Answer

Use heavier scaffold tubes

Answer

Add extra scaffold boards to weigh it down

Answer

Only erect the scaffold during calm weather

Question 4

What is a 'design check category' in relation to specialist temporary works under BS 5975?

Accepted Answer

A classification (1, 2, or 3) that determines the level of independent design checking required based on the complexity and risk of the temporary works

Answer

A quality grading for scaffold tubes

Answer

A fire rating for temporary structures

Answer

A cost category for budgeting purposes

Question 5

A specialist scaffolder discovers that a scaffold standard (vertical tube) is resting on soft ground that is beginning to sink. What is the correct action?

Accepted Answer

Stop work, evacuate the scaffold, report to the scaffold supervisor and TWC for an engineered solution such as sole boards or foundations

Answer

Pack materials under the base plate to level it

Answer

Adjust the jack and continue working

Answer

Move the standard to a firmer location

Question 6

What is the minimum width of a scaffold working platform for specialist construction work where materials need to be stored on the platform?

Accepted Answer

A minimum of 5 boards wide (1.07m) to allow safe passage while materials are stored

Answer

600mm (3 boards)

Answer

800mm (4 boards)

Answer

Any width as long as guardrails are fitted