ruumis olevate süttivate materjalide kogu pinna äkiline põlema löömine
a stage in the development of a contained fire in which all exposed surfaces reach ignition temperature more or less simultaneously and fire spreads throughout the space and flames appear on all surfaces
If the FRG considers the proposal to be well founded, it will then determine (either itself or on the basis of recommendations) the functional performance criteria upon which a product is to be judged in the new reference test (e. g. no flashover in a room, extent of fire spread from storey to storey via a fa?ade etc) and, if required, any parameters that need to be measured or observed to express these criteria (e. g. time to flashover, heat release, flame spread, smoke production, occurrence of flaming droplets etc).
