OSHA 30-Hour Construction Safety
Complete course prep with 600+ practice questions. Learn fall protection, electrical safety, scaffolding, and OSHA compliance. Get the card employers want.
What is OSHA 30?
OSHA 30 is a 30-hour safety awareness course for construction supervisors and workers. It's not a test you “pass” — it's a course completion card that proves you've completed formal safety training.
The DOL card (green or blue laminated credential) is what employers want. Some states require it by law for public works projects. VoltExam tests you on the knowledge the course covers, so you truly understand the material rather than just sitting through lectures.
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Frequently Asked Questions
Is OSHA 30 a test you pass or fail?▼
OSHA 30 is not a test — it's a 30-hour safety awareness course. You complete the course to earn a card. VoltExam tests you on the knowledge covered, so you deeply understand the material rather than just sitting through lectures.
How long does the course take?▼
The official OSHA 30-hour course takes about a week at an accredited training center (full-time). Self-paced online options take 2–4 weeks depending on your schedule.
What's the difference between OSHA 10 and OSHA 30?▼
OSHA 10 is for entry-level workers (10 hours). OSHA 30 is for supervisors and managers (30 hours). OSHA 30 covers more in-depth hazards and compliance responsibilities.
Is my OSHA card valid nationwide?▼
Yes. The card is issued by DOL-authorized training centers and is recognized nationwide. However, some states or local jurisdictions may have additional requirements for public works projects.
Does OSHA 30 expire?▼
The card itself doesn't technically expire, but employers expect the knowledge to be current. Some states and companies request recertification every 5 years, while others don't.
What construction jobs require OSHA 30?▼
Most supervisory roles, safety coordinators, and public works projects. Many general contractors, heavy equipment operators, and site managers pursue it to advance their careers or meet employer requirements.