405.2+3+6 – Slope
405.2 Slope.
Ramp runs shall have a running slope not steeper than 1:12.
405.3 Cross Slope.
Cross slope of ramp runs shall not be steeper than 1:48.
405.6 Rise.
The rise for any ramp run shall be 760 mm (30″) maximum.
| Table 405.2 | |
| Maximum Ramp Slope and Rise for Existing Sites, Buildings, and Facilities |
|
| Slope ยน | Maximum Rise |
| 1. A slope steeper than 1:8 is prohibited. | |
| Steeper than 1:10 but not steeper than 1:8 | 3 inches (75 mm) |
| Steeper than 1:12 but not steeper than 1:10 | 6 inches (150 mm) |