PASMA Environmental Considerations 3 — Questions and Answers
Question 1: What precautions are needed when using a tower scaffold in an area with dust or airborne particles?
- No precautions are needed
- RPE (respiratory protective equipment) may be needed, and dust can reduce visibility, create slip hazards on platforms, and affect component mechanisms (Correct answer)
- Dust improves grip on the platform
- Only eye protection is needed
Correct answer: RPE (respiratory protective equipment) may be needed, and dust can reduce visibility, create slip hazards on platforms, and affect component mechanisms
Airborne dust or particles may require RPE (masks or respirators), eye protection, and additional cleaning of platforms. Dust accumulation on platforms creates slip hazards, and fine particles can interfere with locking mechanisms on components.
Question 2: What is the risk of using a tower scaffold near chemical storage or processing areas?
- No additional risks
- Fumes may be toxic requiring RPE, chemical spills may corrode components, and some chemicals are flammable creating fire and explosion risks (Correct answer)
- Chemicals make the tower stronger
- Only an apron is needed
Correct answer: Fumes may be toxic requiring RPE, chemical spills may corrode components, and some chemicals are flammable creating fire and explosion risks
Chemical environments introduce risks of toxic fume inhalation, corrosive damage to aluminium components, fire and explosion hazards, and contamination of workers. A COSHH assessment must identify the chemicals present and the necessary controls.
Question 3: How does altitude (above sea level) affect tower scaffold use?
- Altitude has no effect
- Higher altitudes generally mean higher wind speeds, lower temperatures, and reduced air pressure, all of which affect worker performance and tower stability (Correct answer)
- Higher altitude makes the tower lighter and safer
- Altitude only matters above 3,000 metres
Correct answer: Higher altitudes generally mean higher wind speeds, lower temperatures, and reduced air pressure, all of which affect worker performance and tower stability
At higher altitudes (e.g., mountainous terrain), wind speeds tend to be higher, temperatures lower, and the reduced air density can affect breathing during physical exertion. These factors must be considered in the risk assessment for elevated work sites.
Question 4: What lighting considerations apply when using a tower scaffold?
- Lighting is not relevant to scaffold safety
- Adequate lighting must be provided for safe access, working, and inspection — natural or artificial, without creating glare or deep shadows (Correct answer)
- Only natural daylight is acceptable
- Floodlights should be mounted on the tower itself
Correct answer: Adequate lighting must be provided for safe access, working, and inspection — natural or artificial, without creating glare or deep shadows
Under the Workplace (Health, Safety and Welfare) Regulations 1992, adequate lighting must be provided. At height, poor lighting increases the risk of trips, misjudged steps, and unidentified hazards. Light sources must not create glare or deep shadows that obscure hazards.
Question 5: What is the risk of noise exposure when working on a tower scaffold?
- Noise is not a risk at height
- Loud noise from nearby machinery or operations can prevent operatives from hearing warnings, communicating, and can cause distraction leading to falls (Correct answer)
- Noise improves concentration
- Noise is only a risk indoors
Correct answer: Loud noise from nearby machinery or operations can prevent operatives from hearing warnings, communicating, and can cause distraction leading to falls
Excessive noise impairs communication between the platform and ground level, prevents operatives from hearing warning signals or approaching vehicles, and can be distracting. Under the Control of Noise at Work Regulations 2005, noise exposure must be assessed and controlled.
Question 6: What environmental factors affect the decision to tie a tower scaffold to a structure rather than use freestanding?
- Tying is never necessary
- High wind exposure, proximity to traffic, extended duration of use, and the specific site conditions may all make tying the preferred option (Correct answer)
- Tying is only for indoor towers
- Only the tower height matters
Correct answer: High wind exposure, proximity to traffic, extended duration of use, and the specific site conditions may all make tying the preferred option
Exposed sites with consistent wind, proximity to vibration sources (traffic, machinery), long-term use, and complex configurations all favour tying the tower to a fixed structure for additional stability, rather than relying solely on freestanding stability and outriggers.
PASMA Environmental Considerations 3
What precautions are needed when using a tower scaffold in an area with dust or airborne particles?