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Toolbox talk · 12 min · PPE

Respirator Basics

Hazards: Inhalation of silica, wood, lead or welding fume · Solvent and paint vapors during spraying and coating · Oxygen-deficient or IDLH atmospheres · Physiological strain on the wearer from breathing through a respirator

Why it matters

Respiratory Protection, 29 CFR 1910.134, was the fifth most cited OSHA standard in fiscal year 2025 — and it is one of the few pieces of PPE that can hurt you on its own. Breathing through a facepiece is work. In an OSHA accident report from May 18, 2023 (Summary Nr 156716.015), a worker spray-coating epoxy in a half-face respirator felt chest pain, used his inhaler twice, collapsed and later died. The report does not settle a cause, but it is exactly the situation the medical evaluation in 1910.134(e) exists for.

Key points

  • Medical evaluation comes first. 1910.134(e)(1): before you are fit tested, before you are required to wear it. Paid for by the employer.
  • Fit test the exact respirator. Same make, model, style and size — before first use, on any change, and at least annually (f)(2). New face, new fit test.
  • Seal check every time. (g)(1)(iii) requires a user seal check at every donning. Ten seconds, every time, not once a year.
  • Nothing in the seal. (g)(1)(i): no facial hair crossing the sealing surface, nothing else that breaks the face-to-facepiece seal. Glasses and other PPE go on so they do not break it either.
  • The right cartridge for the right thing. Appendix D says it plainly: a respirator that filters dust will not protect you from gases, vapors, fumes or smoke. Check the NIOSH certification on the box.
  • Voluntary use is not free-for-all. Under (c)(2) the employer must first decide it creates no hazard, and must hand you Appendix D. Keep track of your own respirator — do not grab somebody else's.

Do / Don't

Do

  • Shave the seal area on days you will wear a facepiece.
  • Do the seal check before you walk into the work.
  • Tell your supervisor if breathing in it gets hard.

Don't

  • Borrow a coworker's respirator or cartridges.
  • Use a dust mask against solvent or paint vapors.
  • Leave a used facepiece loose in a dusty gang box.

Quick site check

  • Whose fit test is more than twelve months old, or on a different model than they hold today?
  • Are the cartridges on hand the right ones for what we are cutting, spraying or welding?
  • Any facepieces with cracked straps, hard valves or missing gaskets to pull out of service?
Discussion — ask the crew
  1. Which task on this job puts something in the air, and what are we actually wearing for it?
  2. Who here has been fit tested in the last twelve months, on the make, model and size they are wearing today?
  3. Who does a seal check every single time they put the respirator on, and who has never been shown how?
  4. Who has grown a beard or lost weight since their last fit test, and who did they tell?
  5. Are any of us wearing a dust mask nobody asked us to wear, and does the boss know?
Refs: 29 CFR 1910.134 — Respiratory protection: written program (c), voluntary use (c)(2), medical evaluation (e), fit testing (f), facepiece seal and user seal check (g)(1), recordkeeping (m) · 29 CFR 1910.134 Appendix D (Mandatory) — Information for Employees Using Respirators When Not Required Under the Standard · 29 CFR 1926.103 — Respiratory protection, construction: the requirements are identical to those set forth at 29 CFR 1910.134 · OSHA — Top 10 Most Frequently Cited Standards, FY 2025 (Respiratory Protection, general industry, ranked fifth) · OSHA Accident Search — Accident Summary Nr 156716.015, event date 05/18/2023Sign-in sheet included in the printed version

Frequently asked questions

For a required respirator, yes, and it comes first. 29 CFR 1910.134(e)(1) says the employer provides a medical evaluation to determine the employee's ability to use a respirator before the employee is fit tested or required to use it. The evaluation is done by a physician or other licensed health care professional using the questionnaire in Appendix C, and (c)(4) puts the cost on the employer.

Before first use of a tight-fitting facepiece, whenever a different facepiece size, style, model or make is used, and at least annually after that — 1910.134(f)(2). Paragraph (f)(3) adds a fit test whenever there is a change in your physical condition that could affect fit, such as facial scarring, dental changes, cosmetic surgery or an obvious change in body weight.

No. 1910.134(g)(1)(i)(A) says the employer shall not permit respirators with tight-fitting facepieces to be worn by employees who have facial hair that comes between the sealing surface of the facepiece and the face, or that interferes with valve function. Stubble in the seal area counts. A loose-fitting powered air-purifying hood is the usual alternative — ask your employer.

Every time you put the respirator on. 1910.134(g)(1)(iii) requires employees to perform a user seal check each time, using the procedures in Appendix B-1 or the manufacturer's procedures the employer demonstrates are as effective. It is a ten-second check that the facepiece is sealed right now — it does not replace the annual fit test.

That is voluntary use, and it has its own rules in 1910.134(c)(2). The employer may permit it only after determining the use will not itself create a hazard, and must give you the information in Appendix D. For voluntary use of anything other than a filtering facepiece, (c)(2)(ii) also requires enough of a written program to confirm you are medically able to use it and that it is cleaned, stored and maintained safely. Filtering facepieces — dust masks — are excepted from that written-program element.

Yes, word for word. 29 CFR 1926.103 states that the requirements applicable to construction work under that section are identical to those set forth at 29 CFR 1910.134. There is no lighter construction version of the respirator rule.

The employer. 1910.134(c)(4) requires respirators, training and medical evaluations to be provided at no cost to the employee, and 1910.132(h)(1) carries the same rule for PPE generally.

Sources & references

Content checked against these sources — last reviewed August 28, 2026.

Results are estimates for planning purposes and do not replace a competent person's evaluation or an engineer's design. Follow the OSHA standards that apply to your work and your employer's written program.

By — Editorial team of SteelToeTools.com (published by LSEA SAS) Updated