Width of aisle.

§ 25.815 Width of aisle. The passenger aisle width at any point between seats must equal or exceed the values in the following table: Passenger seating capacity Minimum passenger aisle width (inches) Less than 25 in. from floor 25 in. and more from floor 10 or less 1  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. [Amdt. 25-15, 32 FR 13265, Sept. 20, 1967, as amended by Amdt. 25-38, 41 FR 55466, Dec. 20, 1976]