Show up to a job site without an OSHA 10 card and you may not get past the gate. It’s not a federal mandate for every worker, but it has become the default credential contractors, general contractors, and training programs check for before they let you near a project. Here’s what the 10-hour course actually covers, why so many employers ask for it, and how to get it.
What OSHA 10 Certification Actually Is
OSHA 10 comes out of OSHA’s Outreach Training Program, delivered through a network of OSHA Training Institute (OTI) Education Centers and the independent trainers and providers they authorize. Complete the 10-hour Construction Industry course and you receive a completion card processed by the Department of Labor, the card most people mean when they say “I have my OSHA 10.”
OSHA is direct about the fact that this isn’t a legal requirement on its own: “The Outreach Training Program is voluntary and OSHA does not require Outreach training.” What changes the picture is who else has picked it up. OSHA’s own FAQ notes that “some states, municipalities, employers, unions, and other organizations have enacted requirements mandating training,” and in practice, most general contractors, many public construction contracts, and a long list of employers across the trades treat it as a baseline expectation for anyone on site, regardless of whether any law technically requires it.
What’s Actually Covered in the 10 Hours
The Construction Industry version of the course, the track most HVAC, electrical, and plumbing students take, has a specific required curriculum, not just a general safety pep talk. Per OSHA’s official Outreach Training Program procedures, the 10 hours break down into three parts:
- 6 hours of required topics: Introduction to OSHA (1 hour), the “Focus Four” construction hazards (4 hours total, made up of Falls at a minimum of 1 hour 30 minutes, Electrocution at a minimum of 30 minutes, Struck-By at a minimum of 30 minutes, and Caught-In or -Between at a minimum of 30 minutes), Personal Protective Equipment (30 minutes), and Health Hazards in Construction (30 minutes).
- At least 2 hours of electives, with a minimum of two topics chosen from a list that includes excavations, scaffolds, cranes, materials handling, stairways and ladders, confined spaces, and hand and power tools, among others.
- Up to 2 hours of optional content, where the trainer can go deeper on any required or elective topic or add other job-relevant hazards.
There’s also a separate General Industry track for people working in existing, occupied facilities rather than active construction sites, which swaps the Focus Four for topics like walking and working surfaces, electrical safety, and hazard communication. Which track you need usually comes down to the kind of work: new-install and construction-site work points to the Construction Industry course, while ongoing maintenance and service work inside a facility points to General Industry. Either way, OSHA caps instructional time at 7.5 hours per day, so a 10-hour course typically runs across at least two sessions.
Why It Actually Matters
The reason falls get more required minutes than anything else in the Focus Four isn’t arbitrary. In the Bureau of Labor Statistics’ Census of Fatal Occupational Injuries for 2024 (released February 2026), construction and extraction occupations accounted for 1,032 of the nation’s 5,070 fatal workplace injuries, and fatal falls, slips, and trips among construction workers totaled 370 that year. Those are the exact hazards the 10-hour course spends the most time on, for exactly that reason.
Does the Card Expire?
No. OSHA 10 completion cards for both the Construction Industry and General Industry tracks don’t expire. If you ever lose yours, your original training provider can issue a replacement, but only for classes completed within the last five years, and only one replacement per student per class. There’s also no minimum age to take the course, and trainers are required to get your card to you within 90 days of finishing the training.
How Mountain West Trade School Prepares You
Our HVAC Technician program builds the full 10-hour OSHA 10 Construction Industry course directly into the curriculum as its own dedicated module, covering the required Focus Four hazards along with electives like excavations, scaffolds, cranes, materials handling, and hand and power tools, not a stripped-down summary. You’ll pass the certification exam online at 80% or better as part of the program, alongside EPA 608, NATE Ready to Work, and ATC HVAC certification prep, so you graduate with the credentials employers are actually screening for, not just one of them.
Get Started
Browse the full HVAC Technician course catalog to see exactly how OSHA 10 fits into the program, or check your state-specific details for Montana, Kansas, and Colorado. If cost is a concern, see our WIOA Grant and Student Financing pages, many students qualify for funding that covers some or all of tuition. Questions? Contact us and we’ll help you figure out the right next step.