Main aisle width.

§ 29.815 Main aisle width. The main passenger aisle width between seats must equal or exceed the values in the following table: Passenger seating capacity Minimum main passenger aisle width Less than 25 inches from floor (inches) 25 Inches and more from floor (inches) 10 or less 12 15 11 through 19 12 20 20 or more 15 20 1  A narrower width not less than 9 inches may be approved when substantiated by tests found necessary by the Administrator. [Doc. No. 5084, 29 FR 16150, Dec. 3, 1964, as amended by Amdt. 29-12, 41 FR 55472, Dec. 20, 1976]