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Looking for Specific code sections

  • Thread starter Thread starter TZJR
  • Start date Start date
T

TZJR

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Good afternoon everyone,

Working on a project that is showing curved ramps throughout a park.

Here are my questions that I can't seem to find based on ADA & IBC.

  1. Are ramps allowed to be curved?
    1. ADA - 2010
    2. IBC - 2015 (Adopted by PA)
  2. When they are curved where do you measure the max run of 30 ft too, with a 30 inch rise?
I am only asking the first because I can't find anything that says they can't, but I also can't find anything as to were to measure a curved ramp run too.

Thanks

Tom
 
I am not into sidewalks

But thinking if outside of a building and not part of a building exit

IBC more than likely does not apply.


I would say yes ramps allowed to be curved

Cannot speak on where you measure
 
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There are a couple problems with curved ramps:

(1) It is difficult wheel a wheelchair along a curved path where you constantly have to turn one wheel at a different rate than the other. It is a lot easier to go straight as far as possible and then turn.

(2) The cross-slope on a curved ramp is constantly changing and likely to exceed 2%.
 
I too would argue that IBC probably does not apply....But I would think the curve would be allowed and I would measure the 30" rise at the shortest point of run.....
 
It's a bunch of walkways in a Park, there are buildings, but they are not directly connected to the curved ramps.

With that in mind I also looking at Ramps that start wider at the top and slim down towards the bottom, I can see possibly doing this in reverse starting small and widening, but not sure how it applies.

If at all?
 
TZJR said:
It's a bunch of walkways in a Park, there are buildings, but they are not directly connected to the curved ramps.

With that in mind I also looking at Ramps that start wider at the top and slim down towards the bottom, I can see possibly doing this in reverse starting small and widening, but not sure how it applies.

If at all?
Click to expand...

Egress is not allowed to narrow in the direction of travel, but if these are not egress ramps, no problem...
 
For every 30" vertically you are required to have a level landing, therefore the end of each landing would be the termination of your 30' runs.
As a public park its POT's must be accessible. City in Northern California lost a suit over this back in 06'.
 
If you do an Internet search ada curved ramps, there is some discussion
 
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ICC/ANSI A117.1 has no requirement that ramps are to be straight. Just that a landing is required where ramps change direction. If a ramp is curving right that's just one direction.
 
Rick18071 said:
ICC/ANSI A117.1 has no requirement that ramps are to be straight. Just that a landing is required where ramps change direction. If a ramp is curving right that's just one direction.
Click to expand...
Landings would be required based upon a vertical height change of greater than 30"
 
I don't think the widening or narrowing of the walkways/ ramps would be an issue as long as the minimum clearances are required... Same as MOE - The required width must be provided ---- a 20 foot wide corridor is allowed to narrow down to a six foot double doorway as long as the doors are wide enough to accommodate the width required for egress.
 
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