Dust Toolbox Talk

Inform your crews about the hazards and risks associated with the types of dust present on construction sites.

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Dust Safety talk

Construction sites have many different hazards present and dust can be one of them. Dust can cause a variety of issues from health concerns to physical hazards for workers who are exposed to it. It is important to know and understand the issues that dust on a construction site can cause and what safety steps you can take.

Construction Dust

Construction dust is not just a nuisance, it can also seriously damage your health and some types can even kill you. regularly breathing these specks of dust over a long period of time can cause lung issues and even diseases.

Construction dust is a general term used to describe different types of dust that you may find on a construction site. The three main types of dust are:

  • Silica dust- This is created when working on silica-containing materials like concrete, mortar, and sandstone.
  • Wood dust- This is created when working on softwood, hardwood, and wood-based products such as MDF and plywood.
  • Lower toxicity dust- This is created when working on materials containing very little or no silica. The most common include gypsum, limestone, marble, and dolomite.

    • Dust Health Hazards

    Anyone including workers that breathe in the construction dust should know the damage they can do to the lungs and airways. the main dust-related diseases affecting construction workers are:

  • Lung cancer
  • Silicosis
  • Chronic obstructive pulmonary disease COPD
  • Asthma

    • Some of these diseases such as asthma and advanced siliceous can develop rather quickly. However, most of these diseases take a long time to develop.

    Dust can build up in the lungs and gradually over time harm you. These effects are not often seen immediately and unfortunately by the time it is noticed the total damage done may already be serious and life-threatening.Construction workers are at a greater risk of developing issues associated with dust because many common construction tasks can create high dust levels. It is believed that over 500 construction workers die every year from exposure to silica dust.

    Assess the Risks

    Assess the risks that are linked to construction work and materials. High dust levels can be caused by several factors. These can include:

  • Task- the more energy the work involves the bigger the risk. High energy tools like cut off saws, grinders, and grit blasters can produce an abundance of dust in a short amount of time.
  • Work area- the more enclosed space leads to more chance of dust build-up. however, dust levels can also be high when working outside.
  • Time- the longer the work takes the most duct there will be on the job.
  • Frequency- doing the same work day after day also increases risks associated with dust.

    • Controlling the Risks

    You can use some of the following measures to control the risks involved with working around construction dust.

    Stop Or Reduce Dust

    Before you start on a new job, look at ways to stop or reduce the amount of dust you might make. You can use different materials or less powerful tools. For example:

    Use the right size of building materials so less cutting or preparation is needed Silica-free abrasives reduce the risks when cutting Less powerful tools, try a block splitter instead of a cut off saw Different methods of work- try using a direct fastening system

    Control The Dust

    If you are unable to completely stop the dust there are ways to reduce the dust that is getting into the air. There are two main ways of accomplishing this.

  • Water- The use of water can damp down dust clouds. It just needs to be used correctly. You would need to make sure that enough water is being supplied at the right levels for the whole time that the work is being done, just wetting your materials will not help.
  • On-tool extraction- This can remove dust as it is being produced. One type is the local exhaust ventilation (LEV) system that can fit directly onto a tool. This system consists of several parts including, the tool, extraction unit, and tubing.

    • Respiratory Protective Equipment (RPE)

    RPE equipment can also help with dust when water or on-toll extraction can not reduce the exposure enough. If you are using RPE you need to make sure it is: Adequate for the amount and type of dust you are being exposed to. RPE has an assigned protection factor also called an ADF which shows how much protection it gives to the person wearing it. The general level for construction dust is an ADF of 20. This means the person who is wearing the mask only breaths one-twentieth of the amount of dust in the air. In some woods, you can also use an APF of 10 if the dust risk is lower.

    Suitable for Work- Disposable masks or half masks can become uncomfortable to wear for long periods of time. RPE can help minimize the discomfort when worn for extended periods. Compatible with other items of protective equipment Fits the user- make sure the masks are tight-fitting on the face Worn Correctly- Make sure the masks fit correctly and also make sure you are cleanly shaven for the best fit

    It is also important to remember that RPE is the last line of protection against construction dust. For an RPE to work appropriately it is important to also know what type (species) of wood you are working with.

    Review the Controls

    The work site may already have controls in place but it is crucial that they are all working properly. You can help with this by:

  • Following procedures.
  • Monitor dust exposure.
  • Identify supervisors of issues.
  • Maintain equipment.
  • Replace disposable masks if needed.
  • Properly clean, store and maintain non-disposable RPE.
  • Exam on-tool extraction systems regularly.

    • What To Do

    Considering the dust hazards that can be created on the worksite is the first step to preventing injuries. Realizing the health issues as well as the physical issues and protect yourself and your coworkers. If you have an injury related to dust please notify your supervisor immediately so proper medical treatment can be administered.

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