Fire-Resistant Stair
Staircase with high fire-resistance duration (F90/F120).
Fire-resistant stairs are made of non-combustible materials and withstand fire for 90 or 120 minutes (F90, F120). They retain their load-bearing capacity despite fire and extinguishing water. Such stairs are mandatory in buildings with more than five full storeys and in high-rise buildings to ensure safe evacuation.
