OSHA 10 vs OSHA 30: Which Construction Cards Do Your Crews Actually Need?

The short answer

If you only remember one thing from this article: OSHA 10-hour is for entry-level workers, OSHA 30-hour is for anyone with supervisory responsibility on a construction site. Both are voluntary at the federal level, but if you work in South Dakota, North Dakota, Minnesota, Iowa, Nebraska, or on any federally funded project, you are almost certainly going to be asked for one or both within the first week on site.

That is the headline. The rest of this guide is the practical, real-world version — built from running these classes for South Dakota contractors, framers, electricians, masons, and earthwork crews for more than a decade.

What OSHA Outreach Training actually is

The OSHA Outreach Training Program is a voluntary education program run by the U.S. Department of Labor. It is not a certification, it is not a license, and finishing the class does not make a worker "OSHA certified." That phrase does not exist. What workers actually receive is a wallet-sized DOL Outreach Training card that documents they completed an authorized 10-hour or 30-hour curriculum delivered by an OSHA-authorized trainer.

The card is good for five years from the issue date. Many state agencies, owners, and general contractors require workers to have a card that is less than five years old before they set foot on the job. That is where the "expiration" idea comes from, even though OSHA itself does not technically expire cards.

What's in the OSHA 10-hour Construction class

The 10-hour class is the baseline awareness training for entry-level construction workers. It runs across two days for in-person delivery or roughly two evenings online, and it covers the topics that account for the overwhelming majority of construction injuries and fatalities — the so-called Focus Four: falls, struck-by, caught-in/between, and electrocution.

A compliant 10-hour Construction curriculum includes the following mandatory hours:

• One hour introduction to OSHA, worker rights, and how to file a complaint
• One and a half hours on the OSH Act, General Duty Clause, and inspection process
• Six hours on the Focus Four hazards (one and a half hours minimum on falls)
• Two hours on personal protective equipment, health hazards, and materials handling
• Plus at least two hours from electives the trainer chooses based on the audience — common picks are cranes and rigging, scaffolds, excavations, stairways and ladders, or welding and cutting

Outreach Training is not job-specific. It will not teach a new ironworker how to tie off properly, it will not teach an excavator operator how to read a soil classification, and it will not make a laborer competent in confined space entry. What it does is give workers a shared vocabulary — they know what a "competent person" is, they know what a "guardrail system" looks like, they know that a trench over five feet deep needs a protective system. That common ground makes site-specific training go faster and stick longer.

What's in the OSHA 30-hour Construction class

The 30-hour Construction class is built for site superintendents, foremen, crew leads, project engineers, safety coordinators, owners' representatives, and anyone else who has responsibility for the safety of others on a construction site. It is the same Focus Four foundation, but it goes deeper into program management, hazard recognition, and the regulatory text itself.

The required topic time is roughly:

• Two hours on OSHA and the inspection process (including how to host an inspection without making things worse)
• Three hours on managing safety and health programs
• Twelve hours on the Focus Four — with at least six hours of fall protection
• Four hours on PPE and materials handling
• Four hours on health hazards (silica, lead, asbestos, noise, heat)
• Plus at least six hours of electives chosen from the same elective bank as the 10-hour, but covered in greater depth

A well-run 30-hour will spend significant time on competent person responsibilities, written program requirements (Hazard Communication, Fall Protection, Confined Space, Respiratory Protection, Lockout/Tagout), incident investigation, and the supervisor's role in correcting unsafe behaviors. If your trainer is reading slides for thirty hours, you got the wrong trainer.

So who actually needs which one?

Here is how we usually advise South Dakota contractors to think about it.

OSHA 10-hour for:

• General laborers, helpers, and apprentices in their first year
• New hires on framing, masonry, concrete, drywall, and similar trades
• Drivers, delivery personnel, and other support staff who spend more than incidental time on a construction site
• Office and estimating staff who occasionally walk a job site

OSHA 30-hour for:

• Foremen and crew leads
• Site superintendents and assistant superintendents
• Project managers and project engineers who manage field operations
• Safety coordinators, environmental compliance staff, and HR personnel involved in incident response
• Owners and principals of small contracting firms who run their own sites
• Subcontractor representatives required by a GC to "have a 30-hour on every site"

Some owners and GCs in the Sioux Falls and Rapid City markets have started requiring OSHA 30 for every full-time employee on hospital, federal, and utility-scale projects regardless of role. If you are bidding work in those sectors, check the project safety requirements before you assume the 10-hour will suffice.

In-person vs. online: which is better?

We deliver both, and we will give you the honest answer rather than the marketing one.

Online OSHA 10 and 30 are convenient, predictable, and let workers go at their own pace. They are excellent for distributed crews, traveling employees, and anyone whose schedule cannot absorb two full days off the tools. The DOL-authorized online providers are tightly monitored and the content is solid. The downside: the social part — the questions, the war stories from the instructor, the breakout exercises — is mostly missing. Workers tend to remember less of it six months later.

In-person OSHA 10 and 30 are slower, more expensive in the short term, and require coordinating schedules. But the retention is meaningfully higher, the questions get asked, and a good instructor can connect every topic back to your sites and your hazards. We tend to recommend in-person for a company's first cohort of foremen and supervisors, then online for ongoing refresher and new hires.

A hybrid we use often: send new hires through online OSHA 10 in their first week, then run a 2-hour site-specific orientation that fills the gaps the online class cannot.

Common mistakes employers make

After running these classes for years, the same five mistakes show up over and over.

1. Treating the card as the goal. The card is documentation, not competence. A worker can finish a 10-hour class online and still not understand why a guardrail with a sagging mid-rail is dangerous. Use the class as a foundation and build site-specific training on top of it.

2. Sending the wrong people through the wrong class. Foremen sit through the 10-hour and then have nothing to refer back to when they have to lead a toolbox talk. Laborers sit through the 30-hour and check out by hour twelve. Match the class to the role.

3. Letting cards quietly expire. Most contractors do not track expirations. Then a worker shows up at a federal jobsite and gets turned away at the gate. Keep a spreadsheet, a column for issue date, and a 90-day reminder.

4. Assuming "OSHA 10/30" means the same thing everywhere. There are separate Outreach curricula for Construction, General Industry, Maritime, and Disaster Site work. A General Industry 10-hour is not acceptable substitute for a Construction 10-hour on a building site. Make sure the card actually says Construction.

5. Buying the cheapest online class you can find. If a class costs $19 and promises a card "in 4 hours," it is not authorized. Verify the provider on OSHA's authorized trainer list before you spend money. A card from an unauthorized provider is worthless.

Planning training without losing a week of production

The pushback we hear most from owners is that they cannot afford to pull crews off projects for two full days. Here are four scheduling patterns that work for South Dakota contractors.

Pattern 1: Winter slowdown. Run cohorts of 12-20 workers in January and February when residential and earthwork volumes are down. Most contractors can spare two days during this window.

Pattern 2: Rolling Friday delivery. Run a 10-hour as two consecutive Fridays. Crews stay productive Monday through Thursday, and the class is fresh in their minds across the weekend.

Pattern 3: New-hire onboarding pipeline. Build OSHA 10 into your standard onboarding for the first 30 days. New hires complete it online before they ever set foot on a site. You stop scrambling for cards mid-project.

Pattern 4: Supervisor cohort. Send all foremen and supervisors through the OSHA 30 in a single week-long block during the slow season, then refresh new supervisors as they get promoted. This builds a shared safety vocabulary across the leadership team.

What it costs

In the South Dakota market, expect roughly:

• Online OSHA 10: $60-90 per seat
• Online OSHA 30: $160-200 per seat
• In-person OSHA 10 (group of 10+): $110-150 per seat, all materials included
• In-person OSHA 30 (group of 10+): $300-400 per seat, all materials included

In-person rates drop sharply with group size — bringing the class to your site is almost always cheaper per worker than sending individuals out.

How we run our classes

We are an OSHA-authorized Construction Outreach trainer based in South Dakota. Every class we run is taught by someone who has actually managed construction projects, not a hired contractor reading slides. We bring real examples from local jobs, we adjust the electives to match the audience, and we will come to your shop or jobsite trailer for any cohort of eight or more.

If you have a crew that needs cards before a federal project starts in 30 days, give us a call. We can usually fit a private 10-hour into your schedule within a week and a 30-hour within two. The card is the easy part — the goal is for your foremen to walk out actually thinking differently about hazards on Monday morning.