Ramp/Walking Surface Cross Slope at Existing Site

[alora]

Table 405.2 describes the slopes/maximum rise for ramps for existing sites/buildings/facilities.

Is there similar direction given (or inferred) regarding cross slopes? Meaning, can the cross slope be steeper than 1:48 at an existing facility?

(It looks like there was discussion of increasing the cross slope in the 2010 ADA for drainage reasons to 1:24, but it was shot down.)

Thanks!!

 

[Mr. Inspector]

No ............

 

[mark handler]

Meaning, can the cross slope be steeper than 1:48

2010 ADAAG 405.3 Cross Slope. Cross slope of ramp runs shall not be steeper than 1:48.

 

[alora]

2010 ADAAG 405.3 Cross Slope. Cross slope of ramp runs shall not be steeper than 1:48.

Thank you for totally missing the point of my question.

 

[mark handler]

Is there similar direction given (or inferred) regarding cross slopes? Meaning, can the cross slope be steeper than 1:48 at an existing facility?

No ............

Your question has only one answer, No.

There is no other Point.

 

[mark handler]

If the cross slopes complied with the previous ADAAG standards, it is safe Harbored under the New ADAAG's (2010)

The previous ADAAG 2002

4.3.7 Slope. An accessible route with a running slope greater than 1:20 is a ramp and shall comply with 4.8. Nowhere shall the cross slope of an accessible route exceed 1:50.

1:50 has a less slope than 1:48

1:24 exceeds both standards, So No ............

Your question has only one answer, No.

There is no other Point.

 

[Papio Bldg Dept]

Thank you for totally missing the point of my question.

I am unaware of any significant changes to 403.3, 405.3, or 405.7.1 for cross slopes in new construction, and have seen no additional exceptions similar to 405.3 (given or inferred), that would allow for, or give guidance to creating, steeper cross slopes at existing facilities.

Now if your point is 'can there be steeper cross slopes at existing facilities,' then yes, in some special circumstances, where in "existing sites, buildings, and facilities," cross slopes exceed 2%, non-compliance may be permitted if the site meets all of the scoping provisions (i.e., Churches, 912.8 International Existing Building Code 2006, etc.) and is not on, or part of an accessible route; or the conditions prove compliance to be technically infeasible, in which case compliance shall occur to the maximum extent feasible (i.e., sidewalks and business thresholds along 10% streets and narrow PROW).

I hope this helps, if not, you may want to clarify what exactly you are looking for.