Room Reflectance Room Index C W 0.7 0.5 0.7 0.3 0.5 0.5 2000 F 1 1.5 2 2.5 3 4 0.2 0.2 0.2 0.5 0.3 0.2 2222 0.47 0.51 0.53 0.54 0.55 0.56 50 0.57 0.45 0.49 0.51 0.53 0.54 0.55 0.56 0.46 0.49 0.51 0.53 0.53 0.54 0.55 0.44 0.48 0.5 0.51 0.52 0.53 0.54 0 0 0 0.41 0.45 0.46 0.47 0.48 0.49 0.49 SHRom 1.5; SHRmax-1.5 2. A commercial building has a lift group with four lifts. Each lift has a rated speed 2.5m/s, capacity of 16 persons, door opening of 2.5 seconds and closing time of 3 seconds. The flight time between adjacent floors with an inter-floor distance of 3m is 4 seconds. Assume passengers can enter/exit at 1.5 seconds (average time), and given that there are 18 floors above the main lobby and the population of the building is 720 persons. Car assumed to carry 80% of capacity. Determine: (i) Round trip time (RTT) (ii) Up-peak interval (UPPINT) (iii) Up-peak handling capacity (UPPHC) (iv) Percentage population served (%POP) (v) Quality of services of lift system according to CIBSE guide - End of Question-