Answer Happy

Calculate the equivalent fire severity using the Eurocode formula for a room 4.0 m x 6.0 m in area, 3.0 m high, with one window 3.0 m wide and 2.0 m high. The fire load is 800 MJ/m2 floor area. The room is constructed from concrete. Assume the following criteria for concrete: 1400 Thermal conductivity, k = 1.6W/mK 1200 Density = 2300 kg/m3 1000 Specific heat, c = 980 J/kgK 800 600 1. Stability: Does not collapse (or deflect too much/fast) 400 For flexural elements 200 Limiting deflection D= Ľ2² 400 d mm; or dD Ľ² 0 Limiting rate of deflection mm /min dt 9000 d For vertically loaded members Limiting vertical contraction (negative elongation) Limiting rate of vertical contraction (negative elongation) Temperature [°C] h mm 100 C= dC 3h = dt 1000 mm/min 0 Standard RWS Slow heating or smouldering 30 60 Hydrocarbon RABT-ZIV (highways) 90 Time [min] Modified-Hydrocarbon 120 External exposure ASTM E119 (time in hrs) T-7501-170.41 √, +T ISO 834 (time in mins) T = 345 log₁0 (8+1)+ To Eurocode Hydrocarbon (time in mins) T-1080(1-0.325e-167 -0.6752)+T Eurocode External Fire (time in mins) T-660(1-0.687e-0-0.313e-¹¹)+To 150 180