For better use and arrangement of seats in theaters, cinemas and conferences, the following standards must be observed: The distance between the amphitheater seat and the folding floor in front of the other rows is 75 cm. The width of the chairs connected to each other should be 46 cm and the width of the chairs with handles should be 50 cm. Stair height should be 10 to 15 cm for installing high chairs (high backs) in halls with stepped floors. The minimum distance between rows of chairs for commuting should be 20 cm in halls with flat floors and 40 cm in halls with stepped floors.