Mr. Inspector
SAWHORSE
Looking for an exception for a ramp curb on these two ramps and the top landings. Don't seem right to put a 4" curb on top of the curb.
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Curb on top of a curb?
- Thread starter Mr. Inspector
- Start date
Looking for an exception for a ramp curb on these two ramps and the top landings. Don't seem right to put a 4" curb on top of the curb.
walker.t
SAWHORSE
I don’t think you’re going to find an exception, A117.1 doesn’t say anything about parallel curb ramps that I can find.
The U.S. Access Board must consider this an unstated exception to the need for edge protection, they show a parallel curb ramp without edge protection in this animation (link is cued up to the part showing the parallel curb ramp):
I agree it would seem odd, but it’s also odd to not have the edge protection on a ramp. Here’s an article with several illustrations of parallel curb ramps, see Section 6.6, not one has edge protection between the ramp and the road:
steveray
SAWHORSE
Assuming you are speaking of edge protection, never seen it on a curb ramp, but no handrails either....Curb ramps are not ramps....
Mr. Inspector
SAWHORSE
In my state I am required to go exactly as the ICC/ANSI A117.1-2006 section 405.9 says. Looks like i will tell them to put in the required curbs on top of the curbs for the ramps and the top landings or they can appeal.
steveray
SAWHORSE
406 is curb ramps....no? 405 IS ramps......We never used 2006
walker.t
SAWHORSE
A117.1 402.2 does list curb ramps and ramps as separate components of an accessible route:
Plus there are two separate sections as steveray pointed out:
Now that I look more closely at 406.1 I guess that because it doesn’t say that we have to comply with 405.8 Handrails or 405.9 Edge Protection that curb ramps don’t need to have handrails or edge protection.
I was mistaken to think that A117.1 has to specifically address parallel curb ramps. I think your “exception” is 406.1 because it doesn’t state that you need edge protection on curb ramps.
This looks legal to me. Another design could include stopping the sidewalk that comes in at the right 30 feet from the curb ramp. The landing above the curb ramp goes away. In place of the landing could be a ramp from the curb ramp to the FF of the covered walkway.
Mr. Inspector
SAWHORSE
i never thought to call it a curb ramp because to me it does not look like me without the flared sides. But I see the flare sides are not required and there is no definition of curb ramps so I can assume it is a curb ramp. Thanks Walker T.
walker.t
SAWHORSE
You’re welcome. When I think “curb ramp” I automatically think of flared sides, parallel curb ramps to me seem like two “regular” ramps.
Unrelated to your question, looking more closely at your photograph, it looks like the asphalt might be sloped up to the striped accessible route marker. That got me wondering how long the run would be for 1:20 sloped walking surfaces, the sketch below shows 60” runs if the lower 3” is made by the asphalt and the rest by sloped walking surfaces. With maximum 1:20 slopes the term “ramp” doesn’t even come into play.
