OSHA 10 is a 10-hour awareness class for entry-level construction workers. OSHA 30 is a 30-hour class for workers with some safety responsibility — foremen, superintendents, safety coordinators. Neither is required by federal law, and neither one satisfies the training requirements of any OSHA standard on its own. What they give you is a Department of Labor course completion card that a lot of jobsites ask for at the gate.
OSHA 10 vs OSHA 30 at a glance
Both classes come from the same program — OSHA's Outreach Training Program — and both are delivered by OSHA-authorized trainers who have completed the OSHA 500 trainer course and hold at least five years of construction safety experience. The difference is depth, audience and how the hours are spent.
| OSHA 10-Hour | OSHA 30-Hour | |
|---|---|---|
| Intended for | Entry-level construction workers | Workers with some safety responsibility |
| Minimum instructional time | 10 hours | 30 hours |
| Required topics | 6 hours | 14 hours |
| Elective topics | 2 hours, at least 2 topics | 12 hours, at least 6 topics |
| Optional topics | 2 hours | 4 hours |
| Minimum calendar days | 2 days | 4 days |
| Result | A DOL student course completion card, issued by the trainer within 90 days of the class end date | |
What an OSHA 10 class must cover
OSHA fixes six of the ten hours. A trainer cannot swap them out, and the class has to emphasize hazard identification, avoidance, control and prevention rather than reciting the standards.
- Introduction to OSHA — 1 hour. Workers' rights, employer responsibilities, how to file a complaint, the OSHA 300 log, safety data sheets. OSHA publishes the required content for this module.
- Focus Four hazards — 4 hours. Falls get a minimum of 1 hour 30 minutes on their own; electrocution, struck-by and caught-in or between get at least 30 minutes each.
- Personal protective equipment — 30 minutes.
- Health hazards in construction — 30 minutes. Noise, hazard communication, crystalline silica or another construction health hazard.
The remaining four hours are two hours of electives — at least two topics from a fixed list that includes excavations, scaffolds, cranes, confined spaces, concrete and masonry, powered industrial vehicles, hand and power tools, welding and cutting — and two optional hours the trainer can use to go deeper. No topic can run shorter than 30 minutes.
What an OSHA 30 class must cover
The 30-hour class keeps everything above and adds the subjects a person who runs work actually needs. Fourteen of the thirty hours are fixed:
| Topic | Minimum time |
|---|---|
| Introduction to OSHA | 1 hour |
| Managing safety and health | 2 hours |
| Focus Four hazards (falls at least 1 h 30) | 6 hours |
| Personal protective equipment | 2 hours |
| Health hazards in construction | 2 hours |
| Stairways and ladders | 1 hour |
Twelve more hours are electives, and the trainer must present at least six topics from the list. One elective is specific to the 30-hour class: Foundations for Safety Leadership, which runs a minimum of 2 hours 30 minutes when it is taught. The last four hours are optional time.
"Managing safety and health" is the giveaway about who this class is for: injury and illness prevention programs, jobsite inspections, worksite analysis, hazard prevention and control, accident investigations, how to run a safety meeting, supervisory communication. If none of that is your job, the 10-hour class is the right size.
The part most people get wrong: it is voluntary
Straight from OSHA's Construction Industry Procedures:
"The OSHA Outreach Training Program is voluntary. Outreach training does not meet the training requirements contained in any OSHA standard."
OSHA, Outreach Training Program — Construction Industry Procedures, 2024
Read that twice if you run a company. A crew that all holds 10-hour cards is not trained for fall protection under 29 CFR 1926.503, for scaffolds under 1926.454, for excavations, for respirators, or for powered industrial trucks. Those standards each require their own training, often hands-on, often with an evaluation and a record. The Outreach card is general awareness on top of that — not a substitute for it.
The same document notes that some states and local jurisdictions have enacted legislation mandating Outreach training to work on jobsites, while the federal government does not. Check your state, your city and your contract: that is where the actual obligation usually comes from.
How a legitimate class has to run
OSHA's program requirements put hard limits on the schedule, and they are the fastest way to spot a provider cutting corners:
- 7.5 student contact hours per calendar day, maximum. That is why a 10-hour class takes a minimum of two calendar days and a 30-hour class a minimum of four.
- A 10-minute break after every two consecutive contact hours, plus meal periods, which do not count as contact time.
- Tests and attendance are administrative time, not instructional time — they cannot be used to fill the hours.
- Trainers must be authorized: five years of construction safety experience (a degree, CSP or CIH can substitute for two), OSHA 510, then the OSHA 500 trainer course, with an update course every four years.
If a site tells you they can put you through OSHA 30 "in a weekend", or a website promises a card the same afternoon with no class at all, that is not an OSHA-authorized class. OSHA maintains investigation procedures and a watch list for exactly that problem.
What the card is, and what it is not
At the end of a class the trainer submits documentation to their Authorizing Training Organization within 30 days; the organization processes the card request within 30 days; the trainer must get the card into the student's hands within 90 calendar days of the course end date. Cards go to the student directly, no matter who paid for the training, and the trainer may not alter them or add a company name.
Lost your card? Only the trainer who taught your class can request a replacement, and only if the class ended within the last five years — which is why it is worth writing down who taught it and when.
Federal OSHA does not stamp an expiration date on the card. Employers, owners and some jurisdictions do set their own refresh cycles, so "my card expired" usually means "my contractor's rule says five years", not "OSHA says so".
So which one do you need?
| If you are… | Take | Why |
|---|---|---|
| A new laborer, apprentice or helper | OSHA 10 | Hazard awareness and your rights, sized for someone taking direction |
| A journeyman with no crew | OSHA 10 | Same reason; the trade-specific training is what matters more |
| A foreman or lead | OSHA 30 | You decide how work is done — managing safety and health is in the required hours |
| A superintendent or PM | OSHA 30 | Most owners and GCs require it for anyone supervising on site |
| A safety coordinator | OSHA 30, then more | Treat it as the floor, not the ceiling — the standards themselves are OSHA 510 territory |
| Working in a state or city that mandates it | Whichever the law names | The local rule sets the class, the hours and often the refresh cycle |
Reviewing before a class helps it stick. Our free OSHA 10 Construction practice test follows the same topic map — Focus Four, PPE, scaffolds, ladders, excavations, hazard communication — and every answer is traced to the paragraph of 29 CFR it comes from. If you run powered industrial trucks, the forklift operator practice test covers 29 CFR 1910.178 the same way.
Bottom line
- OSHA 10 is for workers, OSHA 30 is for people with safety responsibility. That is the real dividing line, not seniority.
- Both are voluntary under federal law and neither satisfies any OSHA standard's training requirement.
- 7.5 contact hours per day maximum: two days minimum for the 10, four for the 30. No exceptions, no weekend miracles.
- The card comes from an authorized trainer within 90 days, goes to the student, and can only be replaced by that trainer within five years.
- Whatever the card says, the trade-specific training required by the standards still has to happen — and be documented.