Specifies the building dimensions for the space needed to install escalators with a maximum nominal speed of 0,5 m/s, an inclination angle of 30° or 35° and a rise from 2 m to 6 m. The machine room is a part of the truss. Does not apply to certain escalators which are subject to special operational conditions; special designs like spiral escalators, combinations of escalators and passenger conveyors etc.