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Max ADA slope for ramps is 1:12

Posted by doug on March 31st, 2004 05:12 PM
In reply to ramp by darrell philon on March 31st, 2004 04:51 PM [Go to top of thread] your 2' height yields a 24' ramp..........

Here's a link that might be useful:

Here's the section that deals with "existing" conditions.............
"#4.1.6.(3) Special Technical Provisions for Alterations to Existing Buildings and Facilities:

(a) Ramps: Curb ramps and interior or exterior ramps to be constructed on sites or in existing buildings or facilities where space limitations prohibit the use of a 1:12 slope or less may have slopes and rises as follows:

(i) A slope between 1:10 and 1:12 is allowed for a maximum rise of 6 inches.

(ii) A slope between 1:8 and 1:10 is allowed for a maximum rise of 3 inches. A slope steeper than 1:8 is not allowed."

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