Handling Capacity (5 min)
Calculate an elevator's handling capacity over 5 minutes, HC = (300 × Q) ÷ RTT, from the car capacity Q (people) and the round trip time RTT (s). The result, in people carried per 5 minutes, is the standard vertical-traffic performance metric (building peak demand is usually measured over 5 min). The factor 300 is the seconds in 5 minutes. Multiplied by the number of elevators and compared with the building population, it tells whether the system meets demand (typically 12-15% of the population in 5 min in offices). Enter the car capacity and the RTT.
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Capacidade de transporte (5 minutos)
A capacidade de transporte (handling capacity) é o indicador-padrão do desempenho de um sistema de elevadores: quantas pessoas ele consegue transportar em 5 minutos, HC = (300 × Q) ÷ RTT, onde Q é a capacidade da cabine (pessoas) e RTT o tempo de viagem redondo (s). O 300 são os segundos em 5 minutos. Por que 5 minutos? Porque a demanda de tráfego dos edifícios é tradicionalmente medida no pico de 5 minutos — o intervalo mais crítico, como a chegada matinal num prédio de escritórios, quando todos sobem em pouco tempo. A capacidade de transporte de um elevador, multiplicada pelo número de elevadores do grupo, dá a capacidade total do sistema. Compara-se então com a demanda de pico: para escritórios, o sistema deve transportar tipicamente 12 a 15% da população do edifício nesses 5 min de pico (porcentagem menor para residências e hotéis). Se a capacidade não atende, formam-se filas e esperas no térreo. A capacidade depende inversamente do RTT — por isso reduzir o tempo de ciclo (cabines maiores, mais rápidas, despacho eficiente) e adicionar elevadores são as formas de aumentá-la. Informe a capacidade da cabine e o RTT.
Related Tools
Number of Elevators Required
Calculate the number of elevators required, N = peak demand ÷ capacity per elevator, dividing the peak transport demand (people in 5 min) by the handling capacity of a single elevator (people in 5 min). The result is the minimum number of elevators in the group to meet peak demand. In practice, round up and also check the resulting traffic interval (waiting quality). Peak demand comes from the building population times the peak percentage (12-15% in offices). Undersizing causes queues and long waits. Enter the peak demand and the capacity per elevator.
Probable Stops
Calculate the probable number of stops of an elevator, S = N × (1 − (1 − 1/N)^P), from the number of served floors N and the number of passengers P in the car. The result is how many floors, on average, the elevator actually stops at during a trip (probabilistically, two passengers may go to the same floor). It is an essential parameter of the round trip time calculation: more stops raise the RTT. The formula assumes passengers choose destination floors randomly and uniformly. With a full car, S approaches N (stops at almost all). Enter the number of floors and passengers.
Elevator Traffic Interval
Calculate the traffic interval (average waiting time) of an elevator group, INT = RTT ÷ N, dividing the round trip time RTT (s) by the number of elevators N in the group. The result, in seconds, is the average time between elevator arrivals at the main floor — the main service-quality indicator perceived by users (waiting time). Intervals up to 30 s are excellent; above 50-60 s, poor. More elevators in the group reduce the interval. It is the key criterion in sizing the number of elevators. Enter the RTT and the number of elevators.
The results provided by this tool are for general informational and educational purposes only and do not constitute professional, financial, medical, legal, tax or accounting advice. Always confirm important decisions with a qualified professional and official sources.