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§ 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]