Surface Slope Conversions

Below is a list of surface slopes found in the 2012 Texas Accessibility Standards (TAS).

RatioPercentageRelative MeasurementSections Where Referenced:
1:482.0%1/4″ per foot (actually 2.083%)304.2, 305.2, 403.3, 404.2.4.4, 405.3, 405.7.1, 502.4, 503.4, 504.4, 802.1.1, 810.2.4, 810.5.1, 1002.4.2, 1007.3.1, 1009.2.2, 1009.2.3, 1009.4.1, 1009.5.2, 1010.1
1:205.0%19/32″ per foot (actually 4.95%), or 5/8″ per foot
(actually 5.2083%)
106.5, 402.2, 403.3, 403.6, 406.2, 505.1, 505.6, 1007.2, 1007.3.2
1:166.25%3/4” per foot1008.2.5.1
1:128.33%1″ per foot, or 6” of rise per 6’ of run240.2.1, 405.2, Table 405.2, 406.4
1:1010.0%5/16” per 3 “, or 5/8” per 6”, or 1-3/16″ per foot
(actually 9.9%)
Table 405.2, 406.3
1:812.5%3/8” per 3”, or 1-1/2” per footTable 405.2, 1002.2
1:425%1/4″ per inch, or 1” per 4”1007.2
1:250%3/8” per 3/4”, or 1/2” per inch303.3, 404.2.5