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Health & Ergonomics

8 guides

Heat, noise, lifting, silica and other exposures.

All Concrete & Masonry Paving & Earthwork Rigging & Lifting OSHA Compliance Safety Programs & Training Health & Ergonomics

Health & Ergonomics · 6 min read

Heat Acclimatization Schedules: The 20% Rule and What Follows It

New workers, returning workers, and heat waves: the three published day-by-day schedules, and which one applies to the person in front of you.

Health & Ergonomics · 8 min read

Heat Index vs WBGT: Which One Should Run Your Heat Program?

Two heat numbers, two different jobs. What each measures, what each misses, and how to choose the one your heat program runs on.

Health & Ergonomics · 7 min read

Jobsite Decibel Chart: How Loud Are Your Tools, and for How Long?

OSHA-published sound levels for common tools, next to the time OSHA and NIOSH allow at each level.

Health & Ergonomics · 8 min read

How Cold Is Too Cold to Work Outside?

No legal minimum temperature exists. Here is what actually decides it: wind chill, wetness and workload, plus what OSHA expects employers to do about cold.

Health & Ergonomics · 8 min readPopular

OSHA Silica Table 1 Explained

All 18 tasks with their required respirator, the four-hour shift-total rule, and what Table 1 does not excuse.

Health & Ergonomics · 9 min read

NRR Derating Explained: What an Earplug Actually Blocks

The 7 dB subtraction, the 50% safety factor and the NIOSH percentages — which method applies when, and to what.

Health & Ergonomics · 5 min read

The NIOSH Lifting Equation Explained (With a Worked Example)

The six multipliers, the Lifting Index, and a real example where raising a pallet halves the risk.

Health & Ergonomics · 5 min read

OSHA Noise Exposure Limits: the 90 dBA PEL vs the NIOSH 85 dBA REL

Two limits, two exchange rates, very different allowed exposure times — and what each one obliges you to do.