Title: +038=627.001-##001T_03-Fasadevasksystem NorAcon - International Code of Practice (ICOP).pdf
Tables O.3.1, O.3.2 and O.3.3 also include a frostbite indicator, showing the points at O.3.2.3 which the combination of temperature, wind speed and exposure time produces frostbite in humans. The unshaded area and the two shaded areas show how long a person can be exposed before frostbite develops. For example, a temperature of -17 °C/0 °F and a wind speed of 24 km/h/15 mph are shown to produce a wind-chill temperature of -28 °C/-19 °F. Under these conditions, exposed skin can freeze in 30 minutes.© IRATA International Annex O Page 11 of 45 2017-Aug-01IRATA International code of practice for industrial rope access Part 3 of 5: Informative annexes: Annex O: Protecting rope access technicians against environmental conditionsTable O.3.1 – The effect of wind chill in degrees Fahrenheit and miles per hourWind speed mph 0 5 10 15 20 25 30 35 40 45 50 55 6035 31 27 25 24 23 22 21 20 19 19 18 1730 25 21 19 17 16 15 14 13 12 12 11 1025 19 15 13 11 9 8 7 6 5 4 4 320 13 9 6 4 3 1 0 -1 -2 -3 -3 -4