Over deze norm
NEN-EN 124-4 is applicable to precast gully tops and manhole tops made of steel reinforced concrete with a clear opening up to and including 1 000 mm for covering gullies, manholes and inspection chambers for installation within areas subjected to pedestrian and/or vehicular traffic. It is applicable to manhole tops and gully tops for use in - areas which can only be used by pedestrians and pedal cyclists (at least class A 15), - pedestrian areas and comparable areas, car parks or car parking decks (at least class B 125), - the area of kerbside channels of roads which, when measured from the kerb edge, extends a maximum of 0,5 m into the carriageway and a maximum of 0,2 m into the pedestrian area (at least class C 250), - carriageways of roads (including pedestrian streets), hard shoulders and parking areas, for all types of road vehicles (at least class D 400), - areas imposing high wheel loads, e.g. docks, aircraft pavements (at least class E 600), - areas imposing particularly high wheel loads, e.g. aircraft pavements (Group 6, class F 900). This European Standard is not applicable in isolation but only in combination with EN 124-1 and gives guidance for combinations of covers/gratings made of steel reinforced concrete with frames according to EN 124-2, EN 124-3, EN 124-5 and EN 124-6. This European Standard is not applicable to: - concave gratings for class D 400 installed in carriageways of roads or hard shoulders and concave gratings for classes F 900 and E 600; - gratings/covers as part of prefabricated drainage channels according to EN 1433; - floor and roof gullies in buildings which are specified in EN 1253 (all parts); and - surface boxes.