UNI EN 174 : 2004

Foreword
1 Scope
2 Normative references
3 Definitions
4 Design and manufacture
    4.1 General requirements
    4.2 Materials
    4.3 Sit and fit
    4.4 Ventilation
5 Requirements
    5.1 Optical requirements
    5.2 Mechanical strength
    5.3 Protection against water and snow
    5.4 Resistance to ignition
    5.5 Suitability for cleaning and care
    5.6 Optional specifications
6 Testing
    6.1 Field of vision
    6.2 Maximum reduced luminance coefficient
    6.3 Resistance to ultraviolet radiation
    6.4 Mechanical strength
7 Information for users
Annexes
A (normative) Spectral weighting functions for the
    calculation of solar UVA-transmittance values
ZA (informative) Clauses of this European Standard
    addressing essential requirements or other provisions of
    EU Directives