Conforming the European directives the relevant fire safety requirements in the regulations have the following objectives:
• the capacity of structures during a given burn time guarantee
• the production and spread of flames and smoke limit
• the risk of spread of the fire to neighboring construction limit
• the attendees the chance to evacuate the building or to be helped
• take into account the safety of the intervention teams.
To meet these objectives, concerning wall cladding the following requirements are applicable:
• the fire stability
The standard fire shows a common known conventional fire-curve. These nominal curve does not depend on parameters that the actual fire in the fire compartment influence as the fire load, the ventilation conditions and the active fire prevention measures as sprinkler systems.
The standard fire curve (black) is shown, with different other nominal fire curves, in figure below. For comparison, also an arbitrary example of a natural fire curve (blue) is given.
A natural fire curve is a curve that is calculated on the basis of the main parameters that determine fire development in the compartment. A natural fire curve is characterized by its growth phase, heating phase and cooling phase. In the growth stage, the fire is still local. There exist many differences in temperature in the compartment.
In the transition from the growth phase to the phase of a real fire, the fire expands rapidly to the entire compartment. This is called the flash-over Read more