Emergency Exit Width
Calculate the required width of an emergency exit, W = (population ÷ unit capacity) × 0.55, dividing the population to be discharged by the capacity of people per exit unit and multiplying by one unit's width (0.55 m). The result, in metres, sizes doors, corridors, stairs and ramps of escape routes by the exit-unit criterion of fire safety codes. The capacity per unit varies with the type of exit (door, stair, ramp) and the occupancy. Enter the population and the capacity per exit unit.
Resultado
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Largura de saída de emergência
As normas brasileiras de segurança contra incêndio (como a saída de emergência da ABNT NBR 9077 e as instruções técnicas dos corpos de bombeiros) dimensionam saídas pelo conceito de unidade de passagem: a largura mínima (0,55 m) por onde uma fila de pessoas consegue passar. A largura necessária sai de L = (população ÷ capacidade da unidade) × 0,55, onde a população é o número de pessoas que aquela saída precisa escoar (calculado pela área e pela densidade de ocupação típica do uso) e a capacidade da unidade é quantas pessoas cada unidade de passagem comporta — um valor tabelado que depende do tipo de saída: portas e corredores (acesso) escoam mais pessoas por unidade que escadas e rampas (onde o movimento é mais lento e arriscado), e o número também varia com a ocupação (uma escola difere de um hospital ou de um teatro). O resultado, em metros, é a largura mínima de portas, corredores, escadas e rampas das rotas de fuga; arredonda-se sempre para cima ao número inteiro de unidades e respeitam-se larguras mínimas absolutas. Dimensionar bem é vital: saídas estreitas demais criam gargalos que aumentam o tempo de evacuação e o risco de aglomeração e pisoteamento. Informe a população e a capacidade por unidade de passagem.
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