PASMA Tower Assembly Methods 4

Question 1

What is the correct internal access method for climbing a tower scaffold?

Accepted Answer

Using the built-in internal ladder frames via the trapdoor hatch

Answer

Internal ladder frames with trapdoor platforms provide the safest means of access. External climbing or external ladders can destabilise the tower and expose the operative to a greater fall risk.

Question 2

What should be done with the trapdoor hatch after climbing through it?

Accepted Answer

Close it to create a full working platform

Answer

The trapdoor must be closed after climbing through to create a complete working platform. An open trapdoor creates a trip hazard and a fall risk, and reduces the effective platform area.

Question 3

What is the minimum platform width recommended by PASMA for a working platform?

Accepted Answer

600mm

Answer

The minimum recommended platform width is 600mm (approximately 2 feet). Narrower platforms do not provide adequate space for safe working and increase the risk of overbalancing.

Question 4

When building a tower adjacent to a building, what must be considered regarding the height-to-base ratio?

Accepted Answer

The ratio must still be maintained unless the tower is tied to the structure

Answer

The height-to-base ratio must always be maintained unless the tower is properly tied into the adjacent structure using appropriate fixings. Simply being near a building does not provide stability.

Question 5

What is the purpose of the adjustable leg (or screw jack) on a tower scaffold?

Accepted Answer

To allow levelling of the tower on uneven ground

Answer

Adjustable legs or screw jacks allow the tower to be levelled on slightly uneven ground. They must not be extended beyond the manufacturer's recommended limit, and a spirit level should be used to check the tower is plumb and level.

PASMA Practice Test

PASMA Practice Test

PASMA Tower Assembly Methods 4