Title: +038=627.001-##001T_03-Fasadevasksystem NorAcon - International Code of Practice (ICOP).pdf
O.5.2Ultraviolet radiationO.5.2.1Ultraviolet raysO.5.2.1.1 UV radiation is invisible electromagnetic radiation emitted from the sun with wavelengths between 100 and 400 nanometres (nm). These rays cause increasing damage to an exposed person as the wavelength decreases, i.e. the shorter the wavelength, the greater the energy and the greater the risk of damage to the exposed person.O.5.2.1.2 Based on its characteristics and effects, UV radiation is divided into three wavelength ranges: UVA, UVB and UVC:a)UVA covers the wavelength range 320 to 400 nm. UVA is not absorbed by the ozone layer (see O.5.2.2) and is the greatest source of solar radiation at the Earth’s surface.b)UVB covers the wavelength range 280 to 320 nm. UVB is partially absorbed by the ozone layer. UVB rays that are not filtered out cause sunburn and other harm to persons.© IRATA International Annex O Page 38 of 45 2017-Aug-01