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. | ||