ABSTRACT
This chapter discusses the essential design calculations for passenger lifts and electro lighting. The total capacity of passenger lifts required for any building, to give a certain grade of service, is determined by the number of occupants and the number of visitors expected to use the lifts. The calculation of lift performance depends upon the acceleration and retardation times, car speed, and speed of door operation. The probable upwards peak performance and hence the round-trip time of a lift car may be calculated from consideration of the total passenger-transfer time, total door-operating time, and total running time. The chapter explains the inverse-square law and the cosine law of illumination. The lumen method of design is the most commonly used method of lighting design and its objective is to determine a lighting layout that will provide a specified service illuminance on the horizontal working plane from an installation of luminaires mounted overhead in a substantially regular pattern.
