Confined spaces in construction
CHST written lesson, 12 min read. CHST Domain 1: Hazard and Risk Identification and Control
AI-drafted from the cited rules and fact-checked against them. Study aid, not site-specific safety advice. The official rule controls.
What you'll learn
- Explain who identifies confined spaces and what the employer must do after a permit space is found
- Describe how information flows among host employer, controlling contractor and entry employer
- State every condition for the ventilation-only alternate procedures
- Apply the atmospheric testing order and the 10 percent LFL rule
- Apply the rules for reclassifying a space and for reviewing the program
What this lesson covers
This lesson covers how construction employers identify, classify and control permit-required confined spaces under Subpart AA. It teaches who does what, the alternate-procedures conditions, the atmospheric test order, reclassification and program review, which are all frequent exam targets and real jobsite duties.
This lesson is included with a pass
Written lessons come with every CHST pass, along with the video lessons, the question bank, mocks and the tutor. $80 per exam or $143 for all three, for 180 days.
Try the free confined spaces in construction practice questions