These helpers cover the everyday numbers behind a WHS programme: heat and noise exposure limits, confined-space and gas readings, fall clearance, mine ground-control setbacks, and the lag/lead indicators a safety team reports each month. The people reaching for them are HSE advisors, supervisors, mine and site engineers, and confined-space or standby crews doing a quick check before signing a permit.
Heat, noise, UV and manual handling limits
Use these to gauge personal exposure over a shift: heat stress and hydration for hot work, the noise dose plus how long a level is safe before it, and hearing protection to see what the earmuffs actually leave at the ear. Reach for UV timing and the manual lifting check for sun exposure and lifting-task screening.
Confined space, gas and atmosphere
Pick the volume tool to size ventilation or purge time, the ppm/percent converter to translate a metre reading between units, and the %LEL calculator when you need the flammability figure that decides whether entry is safe. The dust TWA tool covers airborne particulate over an eight-hour average.
Incident and risk metrics for reporting
LTIFR counts lost-time injuries and TRIFR counts total recordables, both per million hours, while the frequency-rate tool is the general version if your base differs; use the FMEA number to rank hazards by severity, likelihood and detectability.
Mining ground control and vibration
For open-cut and haul-road work: blast vibration safe distance and highwall standing distance keep people clear of ground hazards, the dump-crest tool sizes windrows and setback at tips, and the sight-distance tool checks stopping room for haul trucks. The dewatering tool checks safe pump operating levels on the same sites.
Emergency planning and containment
Work out fire extinguisher coverage for a floor area, estimate how long an evacuation takes, and size a bund so it holds a spill; the fall-clearance tool checks there is enough room below a working-at-height anchor before a lanyard arrests a fall.
