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FAQ's
What are Dust Mask signs telling workers to do?
Dust Mask signs are telling workers to put on respiratory protection before they enter an area or do a task where the air has particles, dust, or other tiny things that can hurt them.
These signs are saying that it is not an idea to breathe the air in that area without protection.
Is there a difference between a dust mask and a respirator? Does it matter for signage?
Yes, it matters. A dust mask is a filter that can protect you from big particles that are not poisonous. An N95 or half-face respirator is much better at filtering the air and fits tightly on your face. If the air in an area is bad enough that you need a respirator, the sign should say that.
What types of environments need dust mask or respirator signs?
These signs are needed in places like woodworking areas with a lot of sawdust, areas where people are sanding or grinding, places where people handle chemical powders areas where people cut or mix cement or concrete, grain and agricultural processing facilities and areas where people install or demolish drywall.
Any place where tiny particles are in the air all the time needs these signs.
What OSHA standards apply?
The main standard for protection is OSHA 29 CFR 1910.134. This standard covers things like figuring out what hazards are present, choosing the respirator, making sure it fits, checking the workers' health, and training workers. OSHA 29 CFR 1910.132 is a standard that covers all personal protective equipment. OSHA 29 CFR 1910.145 is about signs and tags that prevent accidents. For things like silica dust, OSHA 29 CFR 1910.1053 has further requirements.
Do these signs need to specify the type of dust mask or respirator required?
It is a good idea if they do. The specific sign is that there is less chance that someone will think a simple mask is enough when it is not.
We only generate dust occasionally, not all the time. Do we still need these signs?
Yes, we still need them. Even if the dust is in the air sometimes, it can still be bad for workers. If workers are breathing in particles at any point, they need to wear protection, and the signs should say that.
Can dust get behind these signs and make them fall off over time?
In places with a lot of particles in the air, dust can build up on surfaces. Make the signs not stick well. You should clean the surface before you put up the sign and check on it to make sure it is still stuck on. If the edges start to come off, you should replace the sign.