En risikovurdering ved bruk av svalgang som rømningsvei : bruk av FDS til å undersøke brannsikkerheten ved fravikelser fra preaksepterte ytelser

Abstract

The purpose of this master thesis is to investigate the tenability limits on the egress path on an access balcony when not following all the given pre accepted solutions. The analysis construction deviates from some of the pre accepted solutions given for TEK10 to investigate if the fire safety level is satisfying. According to the standard NS 3901 Requirements for risk assessment of fire in construction works, a comparative qualitative analysis has been done by using FDS. The conditions that are analyzed is the time for critical temperature and heat radiation to occur where fire simulations in FDS has given the available safe egress time for the different analysis constructions. The available safe egress time has been compared to the required safe egress time and the fire safety is commented based on whether the margin between these two are satisfying. The visibility on the access balcony has been commented based on the influence from the window dimension. It has been simulated two different fire growths based on the recommendations from different countries in order to comment on how the choose of design fire affects the results. The results show that if the analysis construction deviate from the pre accepted solution for installation of sprinklers on the access balcony, the fire safety will still be satisfying. If it also deviates from the pre accepted solution for installation of a window with fire rating on the access balcony, the fire safety is satisfied, given a functional sprinkler in the apartment.