Par. 1. - All aisles on the respective floors in the auditorium, having seats on both sides of the same, shall be not less than thirty inches wide where they begin and shall be increased in width toward the exit in the ratio of one inch to five running feet. Aisles having seats on one side only shall be not less than two feet wide at their beginning and shall increase in width, the same as aisles having seats on both sides.

Section 89. Changes in Level

Par. 1. - All changes in the levels of the floors of such buildings, except under stairways, from story to story, and except the necessary steps in galleries and balconies rising or declining toward the exits, shall be made by inclines or declines of no steeper gradient than two in ten within the auditorium, and rising toward the exits, and one in ten for all others.

[1921, c. 60, sect. 7.]

Section 90. Lobbies

Par. 1. - Preceding each division of the theatre there shall be foyers, lobbies, corridors, or passages, the aggregate capacity of which on each floor or gallery shall be sufficient to contain the whole number to be accommodated on such floor or gallery in the ratio of one square foot of floor room for each person.