This section is from the book "The Building Code Of The City Of Boston", by City of Boston Building Department. Also available from Amazon: Building Code of the City of Boston.
Par. 1. - All seats in the auditorium excepting those contained in boxes shall be spaced not less than thirty inches from back to back, measured in a horizontal direction, and shall be firmly secured to the floor. No rows of esats in the auditorium shall contain more than fourteen seats between aisles and where there is but one aisle no row shall contain more than seven seats.
Par. 2. - The platforms for seats in balconies and galleries shall nowhere have a greater rise than twenty-one inches, nor be less than thirty inches from back to back.
[1921, c. 60, sect. 6.]
 
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