The provided content deals with the calculation of smoke layer temperature, maximum volumetric flow rate without plugholing, and exhaust mass flow rate in an atrium building. The calculations involve heat release rates, plume heights, and mass flow rates of plumes from two locations - fire location 1 (Balcony Spill Plume) and fire location 2 (Axisymmetric Plume). The results show that the total mass flow rate at elevation z is 106.48 kg/s, and the maximum volumetric flow rate without plugholing is 7.58 L/s. The smoke layer temperature is calculated to be around 25°C. The exhaust mass flow rate is found to be 8.86 kg/s. The content also references various studies on fire safety design and engineering for atrium buildings.