Safety Topic · 320 articles
TL;DR Match the wavelength first. Eyewear must block the exact nanometre(s) your laser emits — a green-laser filter does nothing against a 1064 nm beam. Then match the optical density. The OD must drop the beam below the maximum permissible…
TL;DR If you run any Class 3B or Class 4 laser, then you are expected to designate a Laser Safety Officer with authority to enforce controls (ANSI Z136.1-2022, US). If OSHA inspects a US laser workplace, then it applies no…
TL;DR — What crews most often get wrong about cable jointing safety Myth: arc-rated clothing protects you from electric shock. Reality: it only limits burns from an arc's heat. It does nothing to stop current passing through your body. Myth:…
TL;DR — The Numbers That Matter 50% projected job growth (2024–2034): Wind turbine service technician is the fastest-growing occupation in the United States, putting more people on towers than ever before (US Bureau of Labor Statistics, 2025). Towers over 200…
TL;DR — Myth vs Reality Myth: Switching off the inverter makes the array safe to handle. Reality: Photovoltaic modules produce voltage whenever daylight reaches them — the DC side stays live independent of the inverter. Myth: Falls only kill from…
TL;DR — The Numbers That Frame the Risk NIOSH recommends no more than 1 µg/m³ of respirable elemental carbon (8-hour TWA) for carbon nanotubes and nanofibers (NIOSH CIB 65, 2013) — and even that figure is a measurement floor, not…
TL;DR Myth: Nanoparticles are too small for respirator filters to catch. Reality: NIOSH-approved N95 and P100 filters capture sub-30 nm particles very efficiently by diffusion — the weak point is the face seal, not the filter media. Myth: A standard…
TL;DR Carbon nanotube exposure limit: worker exposure to respirable carbon nanotubes and nanofibers should not exceed 1.0 µg/m³ as an 8-hour time-weighted average (NIOSH/OSHA, 2013). Nanoscale titanium dioxide limit: the NIOSH recommended exposure limit is 0.3 mg/m³, eight times stricter…
TL;DR Measure climate, not culture. A perception survey captures point-in-time worker perceptions and works as a leading indicator, flagging risk before injuries appear. Start with a validated instrument. NOSACQ-50 or the HSE Safety Climate Tool give you tested validity and…
TL;DR Seven hazard classes — laser products run from Class 1 (safe) to Class 4 (eye, skin, and fire hazard) under the international classification standard (IEC 60825-1, 2014). 1, 5, and 500 mW — the rough visible continuous-wave dividing lines…
TL;DR Protect the eyes and face first. Safety glasses with side shields at all times; add a full face shield whenever you pour, decant, or face a high splash risk. Wear loose-fitting cryogenic gloves, never tight ones. They must come…
TL;DR — The Numbers That Matter 20.9% → 19.5%: Air is 20.9% oxygen; OSHA treats anything below 19.5% by volume as oxygen-deficient (29 CFR 1910.146). ~694 to 1: One litre of liquid nitrogen becomes roughly 694 litres of gas at…
Every safety category is listed in the A–Z directory.