Free Guides
Confined Space Safety Guides
Plain-English guides to confined space signs, equipment, examples, written programs, gas monitors and hydrogen sulfide.
- 12 free guides
- No sign-up
Confined Space Signs: OSHA Requirements, Exact Wording and Where to Post Them
The required DANGER wording, sign format and colors, placement, languages and what signs can't do alone.
GuideConfined Space Entry Equipment: What OSHA Requires and What Crews Actually Use
OSHA's equipment list translated into real gear: monitors, blowers, radios, tripods, winches, harnesses.
GuideConfined Space Examples: What Counts, by Industry
Dozens of real confined spaces by industry, plus quick answers for crawl spaces, attics, pits and open-top tanks.
GuideHow to Write a Written Permit-Required Confined Space Program
The 14 required elements of 1910.146(d) turned into a practical section-by-section outline.
GuideBump Test vs. Calibration: Keeping Your Confined Space Gas Monitor Honest
What bump tests and calibration each do, OSHA's daily recommendation, and what makes sensors read wrong.
GuideHydrogen Sulfide (H2S) in Confined Spaces: Exposure Limits, Effects and Controls
OSHA, NIOSH and ACGIH limits, effects by concentration, why smell fails, and testing and controls.
GuideConfined Space Retrieval Systems: Tripods, Davit Arms, Winches and SRLs
OSHA's retrieval rule, tripods vs. davits, winches vs. 3-way SRLs, harness attachment and setup.
GuideConfined Space Fans and Blowers: Choosing, Sizing and Setting Up Ventilation
Axial vs. centrifugal vs. venturi, CFM and duct losses, explosion-proof options, and setup.
GuideOxygen-Deficient Atmospheres: Causes, Effects and the 19.5% Limit
The 19.5% and 23.5% limits, how oxygen is displaced or consumed, effects by level, testing and controls.
GuideCarbon Monoxide Exposure Limits (PPM) and Confined Space Safety
OSHA, NIOSH and ACGIH CO limits in ppm, IDLH, symptoms, sources near confined spaces, and controls.
GuideConfined Space Entry Procedure: A Step-by-Step Walkthrough
Plan, isolate, ventilate, test, permit, enter, monitor, respond, and close out, in order.
GuideLower Explosive Limit (LEL): What It Is and What 10% LEL Means
LEL and UEL explained, reading %LEL, OSHA's 10% limit, values for common gases, and sensor limits.
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