ECS Health Safety and Environmental Assessment 07

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Questions and Answers

Most deaths on site are caused by:

  • Vehicle movements
  • Solvent inhalation
  • Chemical burns
  • Falling from height (correct)

The type of accident that kills most construction site workers is:

  • Being hit by falling objects
  • Falling from heights (correct)
  • Electrical accident
  • Trench collapses

The main cause of deaths on construction sites is

  • Fire
  • Being run over by plant
  • Falls from height (correct)
  • Excavation collapse

How many people should be working on a ladder at one time?

<p>One (C)</p> Signup and view all the answers

Ladders should be set at a slope of approximately:

<p>1 out for every 4 up (A)</p> Signup and view all the answers

Why should aluminium ladders be kept away from wet lime or cement?

<p>It may corrode the ladder (A)</p> Signup and view all the answers

Before being used, a ladder should be inspected:

<p>By the user (B)</p> Signup and view all the answers

Ladders should be:

<p>Tied or footed AND at the right angle AND in good condition (C)</p> Signup and view all the answers

A ladder giving access to a scaffold can generally be safely used, provided that:

<p>It is tied and extends at least 1 metre above the platform (D)</p> Signup and view all the answers

What is the ideal angle for a ladder against a wall and floor?

<p>Four metres up for every metre out from the wall (C)</p> Signup and view all the answers

The rung of a wooden ladder has started to split, what should you do?

<p>Do not use it, tell your supervisor (C)</p> Signup and view all the answers

Ladders should not be painted because:

<p>The paint may cover a defect or damaged part of the ladder (C)</p> Signup and view all the answers

When can you work from a ladder?

<p>For short periods and then only if it is safe to do so (D)</p> Signup and view all the answers

When working above public areas, what should be considered?

<p>The danger of falling materials (A)</p> Signup and view all the answers

A scaffold tower must be erected by:

<p>A trained and competent person (D)</p> Signup and view all the answers

What is the minimum height of the top guard-rail of a scaffold above the edge from which someone is liable to fall?

<p>950mm (A)</p> Signup and view all the answers

A working platform used for construction work, and from which a person could fall 2 metres or more, must not be used unless it has been inspected (and a report is subsequently prepared) by a competent person:

<p>Within the previous seven days (D)</p> Signup and view all the answers

On a mobile elevating work platform, what should you attach your safety harness to?

<p>A secure anchorage point inside the platform (D)</p> Signup and view all the answers

You have been asked to operate a cherry-picker (mobile elevated work platform) when it is very windy. What should your FIRST consideration be?

<p>Does the wind-speed make it unsafe to use the machine (C)</p> Signup and view all the answers

If you have to work at height and it is not possible to erect a scaffold, or use any other type of working platform or mobile elevating work platform, then you should:

<p>Wear a harness and lanyard at all times (A)</p> Signup and view all the answers

When working on a roof that has fragile, clear-plastic panels, what is the best way of preventing falls through the panels?

<p>Cover the fragile panels with a strong material and secure the covers to stop them being dislodged (B)</p> Signup and view all the answers

When working on a roof that has fragile, clear-plastic panels, what is the best way of preventing falls through the panels?

<p>Crawling boards should always be used (D)</p> Signup and view all the answers

Half the deaths on construction sites are caused by which one of the following?

<p>Falls from heights (D)</p> Signup and view all the answers

What should you do if your work activity requires you to wear a full body safety harness and one is not available?

<p>Stop work immediately and tell your supervisor that you do not have the correct PPE (A)</p> Signup and view all the answers

Under what circumstances do the Work at Height Regulations permit a stepladder to be used on site?

<p>Only when a risk assessment shows that safer alternatives have been ruled out and the task is of low risk and of short duration (C)</p> Signup and view all the answers

Of the following, which is the POOREST method of securing a ladder?

<p>Having someone foot the ladder (D)</p> Signup and view all the answers

Prior to moving a mobile tower scaffold, the platform height should reduced to a maximum of:

<p>4 metres (B)</p> Signup and view all the answers

What is the best method of securing a ladder?

<p>Tying it to a suitable point (A)</p> Signup and view all the answers

Flashcards

Leading Cause of Death on Construction Sites

Falling from a height is the most frequent cause of death on construction sites.

How many people should use a ladder at once?

Only one person should be on a ladder at a time, even if someone else is footing it for stability.

Ideal Ladder Angle

The ideal angle for a ladder is 75 degrees, which can be assessed using the '1 in 4 rule' (for every 4 meters out, there's 1 meter up).

What to do if a ladder rung is damaged?

The rung of a ladder has started to break. Do not attempt to use it or repair it yourself. Immediately inform your supervisor about the damaged equipment.

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Safety Measures for Ladder Use

Ladders should be in good condition, tied or footed, and at the right angle to prevent falls. They should be inspected by the user before use.

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When is it OKAY to work from a ladder?

Ladders are primarily for access, not for working from for extended periods. Only use them for short tasks if other safer options are unavailable and the risk is low.

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Safety Considerations Above Public Areas

When working above public areas, prioritize preventing falling materials, as it poses a significant risk to the public below.

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Who erects a scaffold tower?

Scaffold towers must be erected by trained and competent personnel to ensure they are built safely and securely.

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Minimum Guardrail Height on a Scaffold

The top guardrail of a scaffold should be at least 950mm (37.4 inches) above the edge from which someone could fall.

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Inspection Frequency for Working Platforms

A working platform used for construction work, from which a person could fall 2 meters or more, needs to be inspected by a competent person every 7 days.

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Where to attach your safety harness on a cherry picker?

Always attach your safety harness to a secure anchorage point inside the mobile elevated work platform. Do not attach it to external structures.

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What is the priority when working in high winds?

If high winds make using a mobile elevating work platform unsafe, do not operate it. Prioritize avoiding work in hazardous conditions.

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Safety Equipment When Working at Height

When working at height and other equipment is unavailable, a full-body safety harness and lanyard must be worn at all times.

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Protecting Fragile Roof Panels

Protect fragile roof panels by covering them with a strong material, securing it to prevent displacement, and clearly marking the panel locations.

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Safe Practices on Fragile Roofs

Crawling boards should always be used when working on a roof with fragile panels to provide a safe working surface for the person.

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Fatality Statistics on Construction Sites

Falls from height account for half of all construction site deaths. They are a major safety concern.

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What to do if the correct PPE is unavailable?

If the correct Personal Protective Equipment (PPE) is unavailable, immediately stop work and inform your supervisor. Do not use improvised equipment.

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Permitted Use of Step Ladders on Site

Stepladders may be used on site if a risk assessment determines that safer alternatives are not feasible, the task is low-risk, and the time required is short.

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Best Method for Securing a Ladder

Tying a ladder to a suitable point, securing both stiles, is the safest way to secure a ladder during use.

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Least Safe Method for Securing a Ladder

Footing a ladder is the least safe method of securing it and should be avoided if possible. Other access equipment should be used where practicable.

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Safety Precautions Before Moving a Scaffold Tower

Before moving a mobile tower scaffold, the platform height should be reduced to a maximum of 4 meters.

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Importance of Scaffold Training

Proper training in safe erection and use of scaffolds is essential for anyone involved in construction.

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Study Notes

Safety on Construction Sites

  • Most common cause of death: Falling from heights is the leading cause of fatalities on construction sites, despite other hazards like vehicle movement, chemical exposure and falling objects also posing risks.

  • Type of accident killing most workers: Falling from heights is the biggest killer on construction sites.

  • Main cause of construction site fatalities: Falls from heights are the leading cause of death on construction sites.

Ladder Safety

  • Maximum workers on a ladder: Only one person should use a ladder at a time.

  • Ladder angle: Ladders should be set at a 1:4 slope (1 out for every 4 up).

  • Ladder inspection: Before use, a ladder must be inspected by the user to ensure it's in safe condition.

Scaffold Safety

  • Safe erection: A trained and competent person must erect a scaffold tower.

  • Minimum height above edge: The top guard rail of a scaffold must be at least 950mm above the edge where people could fall.

  • Scaffold Inspection: A scaffold used at heights of 2m or more should be inspected by a competent person within seven days of last use.

Working Above Public Areas

  • Falling material: When working above public areas, consider the risk of falling materials.

Working with Ladders

  • Ladder placement: The ladder should extend at least 1 meter above the landing point.
  • Ideal angle for ladder: The ideal angle for a ladder is 75 degrees.
  • Ladder stability: Ladders should be tied, wedged (where necessary), or have a stability device to prevent them from moving during use.
  • Ladder use: Use only when necessary; the task must have low risk and a short duration.
  • Dangerous materials or conditions: If working with materials that may corrode aluminium ladders, or if the site is wet or windy, ensure the ladder is protected.

Working at Height

  • Fall prevention: Use appropriate fall protection equipment (e.g., harnesses, lanyards).
  • Competent person review: Platforms that could cause a fall of 2 meters or more need to be inspected by a qualified person before use.

Specific Equipment Safety

  • Mobile elevating work platform (cherry picker): When using a cherry picker, consider the weather and site conditions if working in windy weather.
  • Fragile panels: When working on roofs with fragile panels, use crawling boards to ensure the safety of those working on the site.
  • PPE (Personal Protective Equipment): If the correct PPE is not available, stop work immediately.

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